ROCKWOOL®

FIREPRO®
Comprehensive range of passive fire protection
products and solutions
 ROCKWOOL® FIREPRO®

Introduction
Passive fire protection is a critical component of any fire safety strategy.

Usually unseen but always at work, passive fire protection systems are built into the structure of the
building to safeguard the lives of the building occupants. When properly installed, passive fire protection
measures will protect the building’s structure and limit the spread of fire and smoke by containing it
within the compartment.

The ROCKWOOL® FIREPRO® range of passive fire protection products provides firestopping and fire
resistance throughout the building’s construction, ensuring the building and its occupants are safer in
the event of a fire. Our specialist range of products support architects, contractors and developers to
conform to current building regulations.

In the ROCKWOOL® FIREPRO® Book you can find products for a range of specialist passive fire
protection applications which include:

Structural Cavity
protection barriers

Penetration Building
Cavity Linear
seals services
firestops joint seals
protection

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 ROCKWOOL® FIREPRO®

Contents Page No.

Introduction 2

FIRE STOPPING
Section 1 - Penetration seals 4
FIREPRO 50mm Ablative Coated Batt
®
6
FIREPRO® 60mm Ablative Coated Batt 9
FIREPRO Ablative Coating
®
12
FIREPRO Firestop Compound
®
14
FIREPRO High Strength Firestop Compound
®
18
FIREPRO® Intumescent Pillows 23
FIREPRO Multi-Cable Firestop
®
26
FIREPRO Intumescent Putty Pads
®
29
FIREPRO® Firestop Pipe Collars 32
FIREPRO Insulated Fire Sleeves
®
36
FIREPRO Intumescent Pipe Wraps
®
40
FIREPRO® Intumescent Pipe Wrap Roll 43
FIREPRO High Expansion Intumescent Sealant
®
49

Section 2 - Cavity barriers & cavity firestops 54

Fire Barrier System 56
Fire Barrier Slab 72
TCB & PWCB Cavity Barriers 75
FIREPRO® SP Firestop System 79

Section 3 - Linear joint seals 84

FIREPRO® SoftSeal System 86
FIREPRO Linear & Trapezoidal Firestops
®
91
FIREPRO Intumescent Expansion Joint Seal
®
96
FIREPRO® Acoustic Intumescent Sealant 99
FIREPRO Fire Resistant Silicone Sealant
®
103
SP Firestop OSCB 105

FIRE PROTECTION
Section 1 - Structural steel / concrete 110
Soffit Slab 112
FIREPRO Glue
®
115
FIREPRO® BEAMCLAD® Systems 118

FIREPRO® BEAMCLAD® Fixing Guide 127

Section 2 - Building services 150

Fire Duct Systems 152
FIREPRO DuctRock
®
163
FIREPRO® Fire Tube 175

ROCKWOOL Firestopping Principles 179

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 ROCKWOOL® FIREPRO® - FIRE STOPPING

FIRE STOPPING
Section 1 – Penetration seals

Modern buildings include a vast array of building services which when installed, often pass through fire
resistant compartment elements. It is also important to consider that buildings are subject to change, and
that many building services can be added throughout its lifetime.

It is vitally important that breaches applied to compartment walls and floors by services are appropriately
sealed to prevent the passage of fire and smoke. When sealing penetrations through compartment walls
and floors, it essential that approved and tested products are used to re-establish the fire resistance of
the compartment.

ROCKWOOL® Firestopping solutions include a wide range of 3rd party-approved products that have been
developed to seal apertures made within compartment walls and floors. Within our range of penetration
seals, we have products that have been designed for use with specific types of building services including:
• Combustible pipes
• Metal pipes
• Cables, cable trays & conduits
• Fire dampers
• Duct work
• Electrical sockets

FIREPRO® FIREPRO® FIREPRO®

Multi-Cable Intumescent Intumescent
Firestop Pillows Putty Pads

FIREPRO® FIREPRO® Ablative FIREPRO® FIREPRO®

Firestop Coated Batt Firestop Pipe Pipewraps &
Compound Collars Pipewrap Roll

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 PENETRATION SEALS
ROCKWOOL® FIREPRO® - FIRE STOPPING

Core products

• Ablative Coated Batt • Firestop Compound • High Expansion Intumescent Sealant

• Acoustic Intumescent Sealant • High Strength Compound
• Insulated Fire Sleeves • Intumescent Pipe Wraps
• Pipe Wrap Roll • Firestop Pipe Collars

• Intumescent Putty Pads • Multi Cable Firestop • Intumescent Pillows

Useful documents and standards

• ASFP Technical Guidance Document – TGD 17: Code of practice for the installation and
inspection of fire stopping systems in buildings

• ASFP Red Book: Fire stopping and penetration seals for the construction industry

• ASFP: Ensuring best practice for passive fire protection in buildings

• ASFP: On-site guide to installing fire stopping

• ROCKWOOL® Firestopping Standard Details

• BS 476-20: Fire test on building materials and structures. Method for determination of
the fire resistance of elements of construction

• BS EN 1366-3: Fire resistance test for service installations. Penetration Seals

• BS EN 1363-1: Fire resistance tests. General Requirements

• BS EN 13501-2: Fire classification of construction products and building elements.

Classification using test data from resistance to fire tests, excluding ventilation services.

ASFP ( Association for Specialist Fire Protection) guidance documents can be sourced at www.asfp.org.uk

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 ROCKWOOL® FIREPRO® - FIRE STOPPING

FIREPRO® 50MM
ABLATIVE COATED BATT

Advantages
• Excellent fire resistance from a single thickness batt

• Comprehensively tested as part of the FIREPRO®

suite of solutions

• Suitable for sealing wall and floor voids containing

most commonly used services and substrates

• Can be used as a blank seal and a head of wall seal

• Lightweight and simple to install

• Tested for air tightness, providing an additional

smoke and acoustic seal

Description Applications
The ROCKWOOL Ablative Coated Batt • Multiple substrates including: solid
comprises a high density stone wool walls and floors; flexible walls
core, pre-coated on both sides with our • Multi-service penetrations
high-performance ablative coating.
• Head of wall
Ablative Coated Batt has been
• Blank seals
comprehensively tested as part of the
ROCKWOOL FIREPRO® range of fire • Face-fixed applications
protection products, specifically for use
• Large-framed service voids
in service penetrations, head of wall and
other void seals. For a fully comprehensive list of
applications, please refer to the
appropriate ROCKWOOL standard
details available at
www.rockwool.co.uk or contact the
ROCKWOOL Technical Solutions Team.

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Performance
Fire performance
Tests have proved the capability of a single 50mm Batt to provide up to 2 hours fire resistance Integrity
and Insulation ratings are dependent upon the service penetrations and void size. Where 4 hours
integrity and insulation are required we recommend the use of our 60mm Ablative Coated Batt.

Acoustic performance
Tested for head of wall:
• Rw= up to 48db (2 x Coated batts)
• Rw= up to 37db (1 x Coated batts)

The correct use of Coated batt within concealed cavities and voids will reduce the level of transmitted
sound:
• Rw= up to 52 db (2 x Coated batts) - incorporating 48mm O/D PVC /15mm copper pipe penetrations.
• Rw= up to 34 db (1x Coated batts) - incorporating 48mm O/D PVC /15mm copper pipe penetrations.

For specific acoustic requirements please contact ROCKWOOL Technical Solutions.

Product information
Property Description
Length 1200mm
Width 600mm
Thickness 50mm
Fire Resistance Up to 2 hours
Density 160Kg/m³
Air Leakage 0.8 m³/h/m²

Standards and approvals

BS EN 1366-3: 2009 and the dedicated fire resistance standard for linear joint seals, BS EN 1366-4:2006.
Ablative Coated Batt has been classified in accordance with BS EN 13501-2.

Third party accreditation through IFC and Certifire.

CE marked to ETAG 26-02

For further information on the full scope of fire performance please refer to the appropriate standard
details available www.rockwool.co.uk or contact ROCKWOOL Technical Solutions.

Note: All Ablative Coated Batt fire resistance tests were conducted using ROCKWOOL FIREPRO®
ancillary products as appropriate.

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 ROCKWOOL® FIREPRO® - FIRE STOPPING

Installation
1. Make sure that the area within the aperture is clean of any debris and remove any dust from the edges.
2. Cut ROCKWOOL Ablative Coated Batt to the size and shape required to fit the aperture ensuring that
batt will make a tight fit with all edges of the aperture.
3. Cut rectangular holes from the coated batt to accommodate cable trays or ladders containing cables.
4. Cut the Coated Batt across its width at the mid-point of each rectangular hole to enable the Batt to be
fitted into the aperture.
5. Apply ROCKWOOL Acoustic Intumescent Sealant to all edges of the Batt ensuring that an even cover
is achieved over the entire thickness of the Batt. This should include the outer edges of the Batt and
the edges of the cuts made across the Batt to allow fitting into the aperture.
6. Insert the Batt into the aperture.
7. Apply a bead of ROCKWOOL Acoustic Intumescent Sealant approximately 15mm wide around the
perimeter of the Batt ensuring that all gaps between the Batt and surrounding edges are fully filled.
8. Apply a bead of ROCKWOOL Acoustic Intumescent Sealant approximately 15mm wide where cables
pass through the Batt. Ensure that the sealant fully enclosed each cable within the tray or ladder and
that all gaps are fully filled.
9. Repeat step 7 and 8 on the other side of the Batt.

Other installation information

FIREPRO® Ablative Coated Batts are not intended for use as load-bearing seals. Where a load-bearing
seal is required, ROCKWOOL Firestop Compound should be considered.

Solid or suitable
dry wall substrate Non-combustible pipe

Rockwool Fire tube: Insulated non-combustible

Sustained or Interrupted pipe

15mm x 15mm fillet of Plastic pipe

Rockwool acoustic mastic (HDPE, PVC, PP & ABS)

Rockwool Insulated
Fire Sleeve
Cable trays up to 480mm
wide by 25mm deep or cable
ladders up to 340mm x 80mm
50mm Rockwool Coated Batt
Bunched cables or single
sheathed cables <61

For a comprehensive range

of ROCKWOOL solutions
Specification clauses for penetrating services
passing through the Ablative
50mm Ablative Coated Batt is associated with the following NBS clauses:
Coated Batt, please refer to
P12 Fire stopping systems
the applicable ROCKWOOL
• 325 Boards – Mineral Bound Lightweight standard details available
• 360 Mineral Wool Rigid Batts at www.rockwool.co.uk or
• 365 Mineral Wool Rigid Batts – Ablative Coated contact ROCKWOOL Technical
Solutions.

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 PENETRATION SEALS
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FIREPRO® 60MM
ABLATIVE COATED BATT

Advantages
• Excellent fire resistance from a single thickness batt

• Suitable for sealing 20m long x 1.2m high voids at

head of wall

• Suitable for large unframed voids up to 7.02m²

• Tested with dampers

• Comprehensively tested as part of the FIREPRO®

suite of solutions

• Lightweight and simple to install

• Tested for air tightness, providing an additional

smoke and acoustic seal

Description Applications
The ROCKWOOL Ablative Coated Batt • Multiple substrates including: solid
comprises a high-density stone wool walls and floors; flexible walls
core, pre-coated on both sides with our • Multi-service penetrations
high-performance ablative coating.
• Head of wall
Ablative Coated Batt has been
• Blank seals
comprehensively tested as part of the
ROCKWOOL FIREPRO® range of fire • Face-fixed applications
protection products, specifically for use
For a fully comprehensive list of
in service penetrations, head of wall and
applications, please refer to the
other void seals.
appropriate ROCKWOOL standard
details available at
www.rockwool.co.uk or contact the
ROCKWOOL Technical Solutions team.

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 ROCKWOOL® FIREPRO® - FIRE STOPPING

Performance
Fire performance
Tests have proved the capability of a single 60mm Batt to provide up to 4 hours fire resistance Integrity
and Insulation ratings are dependent upon the service penetrations and void size.

Acoustic performance
Tested for head of wall:
• Rw= up to 52db (2 x Coated batts)
• Rw= up to 38db (1 x Coated batts)

The correct use of Coated batt within concealed cavities and voids will reduce the level of transmitted
sound:
• Rw= up to 52 db (2 x Coated batts) - incorporating 48mm O/D PVC /15mm copper pipe penetrations.
• Rw= up to 34 db (1x Coated batts) - incorporating 48mm O/D PVC /15mm copper pipe penetrations.

For specific acoustic requirements please contact ROCKWOOL Technical Solutions

Technical information
Standards and approvals
BS EN 1366-3: 2009 and the dedicated fire resistance standard for linear joint seals, BS EN 1366-4:2006.
Ablative Coated Batt has been classified in accordance with BS EN 13501-2. 60mm Ablative Coated Batt
is also comprehensively tested to BS 476 Part 20 & 22.

Third party accreditation through IFC and Certifire.

CE marked to ETAG 26-02.

For further information on the full scope of fire performance please refer to the appropriate standard
details available www.rockwool.co.uk or contact ROCKWOOL Technical Solutions.

Note: All Ablative Coated Batt fire resistance tests were conducted using ROCKWOOL FIREPRO®
ancillary products as appropriate.

Product information
Property Description
Length 1200mm
Width 600mm
Thickness 60mm
Fire Resistance Up to 4 hours
Density 180Kg/m³
Air Leakage 0.41 m³/h/m²

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 PENETRATION SEALS
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Installation
1. Make sure that the area within the aperture is clean of any debris and remove any dust from the edges.
2. Cut ROCKWOOL Ablative Coated Batt to the size and shape required to fit the aperture ensuring that
batt will make a tight fit with all edges of the aperture.
3. Cut rectangular holes from the coated batt to accommodate cable trays or ladders containing cables.
4. Cut the Coated Batt across its width at the mid-point of each rectangular hole to enable the Batt to be
fitted into the aperture.
5. Apply ROCKWOOL Acoustic Intumescent Sealant to all edges of the Batt ensuring that an even cover
is achieved over the entire thickness of the Batt. This should include the outer edges of the Batt and
the edges of the cuts made across the Batt to allow fitting into the aperture.
6. Insert the Batt into the aperture.
7. Apply a bead of ROCKWOOL Acoustic Intumescent Sealant approximately 15mm wide around the
perimeter of the Batt ensuring that all gaps between the Batt and surrounding edges are fully filled.
8. Apply a bead of ROCKWOOL Acoustic Intumescent Sealant approximately 15mm wide where cables
pass through the Batt. Ensure that the sealant fully enclosed each cable within the tray or ladder and
that all gaps are fully filled.
9. Repeat step 7 and 8 on the other side of the Batt.
Note: For any areas of Batt where the coating has been damaged, repaint with the Ablative Coating. Ensure that there is no uncoated
slab or bare mineral wool visible.

Other installation information

FIREPRO® Ablative Coated Batts are not intended for use as load-bearing seals. Where a load-bearing
seal is required, ROCKWOOL Firestop Compound should be considered. For seals over 1200mm x
1200mm Batt to Batt joints are to be fully coated with FIREPRO® Glue.

Solid or suitable
Non-combustible pipe
dry wall substrate

Rockwool Fire tube: Insulated non-combustible

Sustained or Interrupted pipe

15mm x 15mm fillet of Plastic pipe

Rockwool acoustic mastic (HDPE, PVC, PP & ABS)

Rockwool Insulated
Fire Sleeve
Cable trays up to 480mm
wide by 25mm deep or cable
ladders up to 340mm x 80mm
60mm Rockwool Coated Batt
Bunched cables or single
sheathed cables <61

Specification clauses
For a comprehensive range
60mm Ablative Coated Batt is associated with the following
NBS clauses: of ROCKWOOL solutions
for penetrating services
P12 Fire stopping systems
passing through the Ablative
• 325 Boards – Mineral Bound Lightweight
Coated Batt, please refer to
• 360 Mineral Wool Rigid Batts
the applicable ROCKWOOL
• 365 Mineral Wool Rigid Batts – Ablative Coated
standard details available
at www.rockwool.co.uk or
contact ROCKWOOL Technical
Solutions.

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 ROCKWOOL® FIREPRO® - FIRE STOPPING

ROCKWOOL
ABLATIVE COATING

Advantages
• Suitable for spray or brush application

• Dries to give a sound, flexible white surface finish

• Provides a stable surface for adhesive and fixing

sealants

Description Applications
The ROCKWOOL ablative Coating is a The ablative Coating is available
water based, ready to use viscous paste separately to enable site repairs to
which may be brush or spray-applied Ablative Coated Batts, that may have
to stone wool slabs. The coating is been damaged during installation.
available in white and in other colours
subject to minimum order quantities. ROCKWOOL Ablative Coated Batt is
The coating may be over painted if intended to act as an air seal barrier to
desired*. ROCKWOOL Ablative is reinstate the fire resistance and acoustic
supplied in 5L tubs. performances of concrete floors,
masonry walls and dry wall systems
when voids have been created for the
passage of services. This includes pipes
made of plain or stainless steel, cast
iron, copper, polypropylene (PP), high
density polythene (HDPE ), PVC and
ABS along with all sheathed cables up
to 80mm and supported cable bundles
up to 100mm.

*Please contact ROCKWOOL Technical Solutions for guidance on suitable paints

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 PENETRATION SEALS
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Performance
Fire performance
ROCKWOOL Ablative Coating is designed to re-seal the surface of Ablative Coated Batt where damage
to the ablative coating may have occurred during installation.

ROCKWOOL Ablative Coated Batt has been tested to the dedicated fire resistance standard for
penetration seals EN 1366-3. The independently prepared assessment, detailing the full scope of fire
performance, is available from the ROCKWOOL Technical Solutions Team. Ablative Coated Batt fire
resistance tests were conducted using ROCKWOOL acoustic Intumescent Sealant and/or ROCKWOOL
FIREPRO® Glue.

ROCKWOOL Ablative Coating and stone wool slabs may only be used to fire protect service penetrations
if supported by independent fire test evidence due to the variants in the density and thicknesses of stone
wool slabs available.

Technical information
Product information
Property Description
Cure System Water Loss
Colour White
Specific Gravity 1.3 – 1.4
pH 8.5 – 9.2
Flashpoint None
Solids Content (%w/w) >58%
Application Temp Range +10°C to +30°C
Vice Temp Range -15°C to +75°C
Shelf Life Up to 12 months when stored in unopened
containers under cool, dry conditions. AVOID FROST
and extremes of temperature
Durability Up to 15 years when used as recommended

Installation
ROCKWOOL Ablative Coating can be spray or brush-applied.

Specification clauses
ROCKWOOL Ablative Coating is associated with the following NBS clauses:
P12 Fire Stopping Systems
• 325 Boards: Mineral Bound Lightweight
• 360 Mineral Wool Rigid Batts
• 365 Mineral Wool Rigid Batts: Ablative Coated

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 ROCKWOOL® FIREPRO® - FIRE STOPPING

FIREPRO®
FIRESTOP COMPOUND

Advantages
• Inhibits smoke

• Good acoustic barrier

• Suitable for sealing around most types of service

penetrations

• Load bearing capability

• Simple installation

• No smoke emission

• Unaffected by humidity

Description Applications
Firestop Compound is a specially • Re-instating the fire resistance of wall
formulated gypsum-based compound, and floor constructions
which is mixed with water to be
• Load bearing floors
trowelled or poured around service
penetrations. • Wall penetrations
• Load bearing seals around
unsupported fire dampers

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 PENETRATION SEALS
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Performance
Acoustic performance
Thickness of Compound (mm) Weighted Sound Reduction Index (Rw)
75 39dB
100 46dB
150 51dB

For specific information on acoustic performance please contact ROCKWOOL Technical Solutions on
01656 868490 or technical.solutions@rockwool.co.uk.
Load bearing capability

Thickness of Compound (mm) Max. load bearing area free of services

75 500 x 500mm
100 750 x 750mm

Openings with a clear area larger than 750 x 750mm need to be reinforced as outlined within the
installation section. For further information on the reinforcement of openings greater than 750 x 750mm,
please contact ROCKWOOL Technical Solutions on 01656 868490 or technical.solutions@rockwool.co.uk.

Technical information
Standards and approvals
FIREPRO® Firestop Compound has been tested to BS 476 Part 20:1987
FIREPRO® Firestop Compound is third party accredited through IFC and Certifire.
This product has been authorised for use in LUL surface and sub-surface premises when installed in
accordance with this datasheet - please refer to the LUL Approved Product Register website www.LU-apr.
co.uk for specific details.
Fire performance
Firestop Compound has been independently tested for use in walls and floors.
When reinforced, Firestop Compound offers up to 360mins protection for both Integrity and Insulation in
masonry/ concrete walls or concrete floors.
When un-reinforced, Firestop Compound offers up to 240mins protection for both Integrity and
Insulation in masonry/ concrete walls or concrete floors.
Plastic pipework must be protected with either ROCKWOOL Firestop Pipe Collars or Intumescent Pipe
Wraps. For further advice on specific applications and fire performance, please contact ROCKWOOL
Technical Solutions on 01656 868590 or technical.solutions@rockwool.co.uk.

Firestop Compound - Spans with services

Non-reinforced seals
Firestop Compound Max. opening width x Load bearing capacity
thickness (mm) Fire rating (hours) any linear length (mm) (Kn)
75 2 500 2.5
100 4 750 2.5

Simply reinforced seals

Firestop Compound Max. opening width x Load bearing capacity
thickness (mm) Fire rating (hours) any linear length (mm) (Kn)
100 4 Up to 1500 2.5

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 ROCKWOOL® FIREPRO® - FIRE STOPPING

Product information

Property Description
Pack Size 22Kg Bag
Fire Resistance Up to 6 hours
Load Bearing Capacity Up to 2.5KN
Acoustic Performance Up to 51dB

Installation
Floor installations
In floors, a permanent shuttering made from 50mm ROCKWOOL slab (minimum density 140kg/m3) is cut
and friction fitted between services and the edges of the floor slab. Firestop Compound is then trowelled
over the shutter to a depth of 25mm thick. This is allowed to cure. Further Firestop Compound is then
mixed to a pouring grade and tops the seal up to the required depth (See Figure 1).

Firestop Compound sets in 30-45 minutes and is capable of accommodating light foot traffic in
approximately 72 hours.

Installation instructions – Floors

1. Mix a bag of compound to 10 litres of water (3:1) by volume. Vary to suit site conditions.

2. Set the shuttering into the opening ensuring a tight fit so that once the required depth of compound is
installed it finishes flush with the floor slab/screed unless otherwise specified.

3. Mix and pour compound until the required thickness is achieved.

Insulated metallic pipe Uninsulated metallic pipe

≤160mm PVC, uPVC, PP,

Electrical cable tray / basket
MDPE and HDPE plastic pipe

Rockwool FIREPRO® Pipe Wrap

Rockwool Firestop Compound

Rockwool 50mm shuttering
batt

Figure 1

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Wall installations
In wall applications (See Figure 2), Firestop Compound is mixed into a stiff consistency for trowelling
into openings.
Installation instructions – Walls
1. Mix a bag of compound to 10 litres of water (3:1) by volume. Vary to suit site conditions.
2. Apply the compound using the specified shuttering method (See Figure 3).
3. Trowel the compound starting at the base of the opening ensuring the correct thickness of material
is installed. Work progressively towards the top of the opening until the barrier is complete. If the
shuttering panel is set at the centre, repeat the process on the other side.

Solid wall
structure

120 minute
Fire Damper
1000mm x
1000mm

Rockwool
Firestop
Compound
100mm thick

Figure 2 Figure 3

Thickness of Compound (mm) Number of bags/m²

75 3.15
100 4.20
150 6.30

Coverage
The above calculations are approximate and based on 22kg bags.
The coverage rates shown do not take into account the area of service penetrations within the aperture.

Specification clauses
ROCKWOOL Firestop Compound is associated with the following NBS clauses:
P12 Fire stopping systems
• 340 Intumescent Mortar

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 ROCKWOOL® FIREPRO® - FIRE STOPPING

FIREPRO®
HS FIRESTOP COMPOUND

Advantages
• Unsupported spans of up to 1800mm

• High load bearing capacity

• Suitable for use with multiple service penetrations

• Can be formed into blocks

• Good acoustic barrier

• Effective smoke seal

• Rapid setting

Description Applications
HS Firestop Compound is a specially • Re-instating the fire resistance of wall
formulated gypsum-based mortar, which and floor constructions
is mixed with water to create a workable • Load-bearing floors
range from stiff to pourable mix. HS
Firestop Compound is also suitable for • Wall penetrations
pre-casting into convenient size blocks • Load-bearing seals around
for use in wall openings. unsupported fire dampers

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Performance
Fire performance
HS Firestop Compound has been independently tested for use in walls and floors.

Plastic pipework must be protected with either ROCKWOOL Firestop Pipe Collars or Intumescent Pipe
Wraps. For further advice on specific applications and fire performance, please contact ROCKWOOL
Technical Solutions on 01656 868590 or technical.solutions@rockwool.co.uk

Floor seals - Maximum aperture 1800 x 1800

Min floor
Service Diameter Wall thickness thickness Classification
(mm) (mm) (mm) E EI
Copper pipe ⱡ 40-107 1.5-14.2 100 60 15
Steel pipe ⱡ 40-115 3.5-14.2 100 120
Steel pipe ⱡ 116-160 5-14.2 100 120 90
Electrical cables Ᵽ ≤80 N/A 100 120 60
Non-sheathed wires Ᵽ ≤24 N/A 100 120
Telecom cables Ᵽ 100mm bundle N/A 150 120
Floor seals – Maximum aperture unlagged solutions for cables and conduits
Cable trays ≤450mm 100 120
Cable ladders ≤300mm 100 120
Electrical cables ≤21mm 100 120
Electrical cables 22-80mm 100 120 90
Non-combustible conduits ≤16mm 100 90

ⱡ - Service fitted with 50mm thick H&V 500mm above floor (L/I)
Ᵽ - Service fitted with 25mm thick Ductwrap 500mm above floor (L/I)

Rigid walls min 150mm thick - Maximum aperture 2600 x 2600

Service Diameter Wall thickness Min wall thickness Classification
(mm) (mm) (mm) E EI
Blank seal 2.6 X 2.6M No services 150 240
Non-combustible pipe ⱡ 40 - 219Ɫ 1.0-14.2 150 240
Perforated cable trays ≤500mm n/a 150 240
Non-perforated cable trays ≤500mm n/a 150 240 180
Cable ladders ≤350mm n/a 150 240 120
Cable ladders ≤200mm n/a 150 240 240
Electrical cables (s) ≤21mm n/a 150 240 120
Electrical cables (m) 22-50mm n/a 150 240 120
Electrical cables (l) 51-80mm n/a 150 240 120
Non combustible conduits ≤16mm n/a 150 240 240
Combustible conduits ≤16mm n/a 150 240 180
ⱡ - Service fitted with 1m long 25mm thick H&V section (C/S) - 0mm separation distance to each other and aperture opening
Ɫ - When installed in opening with cable services, the diameter range reduces to 40 -108 with 10mm spacing

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Acoustic performance
HS Firestop Compound has been tested in accordance with EN 10140 achieving Rw 57dB at a depth of
100mm (with 50mm ROCKWOOL shuttering batt).

For specific information on acoustic performance please contact ROCKWOOL Technical Solutions on
01656 868490 or technical.solutions@rockwool.co.uk

Load bearing capability

HS Firestop Compound in floor spans of up to 1800mm without the need for further reinforcement. For
further information on the load bearing capacity of HS Firestop Compound, please contact ROCKWOOL
Technical Solutions.

Property Description
Description Grey coloured free flowing powder
Pack size 20kg bag
Density 1750-1900kg/m³
Loadbearing 2.5KN/m² UDL
Fire resistance Up to 4 hours
Acoustic performance Rw 57dB (100mm Depth)
Max unsupported span 1800mm
Thermal conductivity 0.45W/mK
Setting expansion (%) 0.1
Typical yield ±6bags/m² at 100mm depth
Expected shelf life 6 months (When stored in accordance with the packaging instructions)

Technical information
Standards and approvals
FIREPRO® HS Firestop Compound has been tested for resistance in accordance with BS 476 Part 20
and EN 1366-3.

HS Firestop Compound has been classified as EI 120 in accordance with EN 13501-2

FIREPRO® Firestop Compound is third party accredited through Certifire.

This product has been authorised for use in LUL surface and sub-surface premises when installed in
accordance with this datasheet - please refer to the LUL Approved Product Register website
www.LU-apr.co.uk for specific details.

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Installation
Mixing
HS Firestop Compound can be mixed preferably by mechanical paddle or manually, if required. Measure
out the correct amount of clean water into a clean container to achieve the desired consistency.

Avoid any cross-contamination with part-cured and new mixes as this can accelerate curing times.

HS Firestop Compound: water ratio

Pourable Mix ratio of 3 - 3Vz:1
Trowel Mix ratio of 4:1

Gradually add the HS Firestop Compound, stirring continually. Continue mixing until the compound is
mixed to a smooth, even consistency. Any spillage should be wiped up with a damp cloth before setting
occurs*. Mix only enough material sufficient for use within the recommended pot life (20-30 minutes). Pot
life and set times will be reduced for lower water content and higher temperatures.

*HS Firestop Compound may stain pipes and services

Installation should not be carried out when temperatures are above 35°C. Setting times are normally
between 30 and 90 minutes.

Note: Do not attempt to extend working time by remixing with additional water once the mortar has
started to set, as this will interfere with the setting process. Always mix in clean buckets.

Fit a shuttering board to the bottom of the opening. Shuttering materials must be able to support the
wet weight of the compound under pouring conditions. Pour HS Firestop Compound to the required
100mm thickness.

General installation requirements

Ensure that the aperture and services in question are tested with HS Firestop Compound, and the site
conditions are within the application specification.

All services and apertures need to be clean and clear of all dust and loose particles. The aperture
temperature needs to be at 5°C or above at time of installation. Plastic pipework must be protected with
either ROCKWOOL Firestop Pipe Collars or Intumescent Pipe Wraps.

Upon installation make sure that you install the HS Firestop Compound to the recommended ratio for
the aperture you are installing, make sure that you fill the full depth in a single pour to create a solid
structure. Apply a minimum depth of 100mm in a single pour to achieve loadbearing capabilities.

Once filled, smooth off the HS Firestop Compound to produce a professional finish.

Wall openings (Figure 1)

For small holes and gaps, trowel a stiff mix into the opening to the correct depth. For larger holes, use an
appropriate non-combustible shuttering material to support the mix until it sets, or, if a fair faced finish is
required to both sides, consider using a sandwich construction. Alternatively, the HS Firestop Compound
may be pre-cast into convenient sized blocks, a stiff mix being used as a bedding mortar. All combustible
services (Plastic Pipes etc.) should have a ROCKWOOL tested fire rated closure device/material fitted
prior to the pouring of the HS Firestop Compound.

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 ROCKWOOL® FIREPRO® - FIRE STOPPING

Floor openings (Figure 2)

When sealing holes in floor slabs, appropriate shuttering must be installed, cut to fit tightly around any
services within the opening, to support the wet mix until it sets. Non-combustible shuttering materials,
such as mineral fibre slab, can be left in place, but combustible materials must be removed, after the mix
has set. For complex penetrations it may be preferable to initially form a thin seal around all services with
a nominal 5mm layer of the HS Firestop Compound mix. Once this has set, the remaining depth of seal
should be poured in one operation. All combustible services (Plastic Pipes etc.) should have a tested fire
rated closure device/material fitted prior to the pouring of the HS Firestop Compound.

Solid wall structure

120 minute Fire Damper

1000mm x 1000mm

Rockwool Firestop
Compound 100mm thick

Figure 1

Insulated metallic pipe

Uninsulated metallic pipe

≤160mm PVC, uPVC, PP,

MDPE and HDPE plastic
pipe

Electrical cable tray /

basket

Rockwool Firestop
Compound

Rockwool 50mm
shuttering batt

Figure 2 Rockwool FIREPRO® Pipe

Wrap

Specification clauses
ROCKWOOL Firestop Compound is associated with the following NBS clauses:
P12 Fire stopping systems
340 Intumescent Mortar

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FIREPRO®
INTUMESCENT PILLOWS

Advantages
• Easy to install

• Easy to remove and reinstate when changing

services

• Maintenance free

• Dry system

Description Applications
FIREPRO® Intumescent Pillows consist Under fire conditions, Intumescent
of intumescent material encased within Pillows expand several times their
a glass cloth bag. Intumescent Pillows original volume to form an effective seal
are simply packed tightly in between around service penetrations.
penetrating services and the wall. In a
floor, pillows are additionally supported Intumescent Pillows are suitable for use
by means of a mesh support system with:
(see Figure 3). • Metal pipework
• Cable trays
• Electrical trunking (inside and outside)

Figure 1 Figure 2 Figure 3

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Performance
Fire performance
ROCKWOOL Intumescent Pillows to provide up to 4 hours rating where services pass through fire-rated
walls and floors.

Table 1
Performance in masonry supporting walls

Fire resistance (min)

Method of support/ installation Maximum aperture dimensions Integrity Insulation
Friction fitted 850 x 850mm 120 120
Friction fitted 600 x 600mm 240 120

Table 2
Performance in drywall systems
Fire resistance (min)
Method of support/ installation Maximum aperture dimensions Integrity Insulation
Friction fitted 850 x 850mm 120* 120*

Table 3
Performance in concrete floors
Fire resistance (min)
Method of support/ installation Maximum aperture dimensions Integrity Insulation
Wire basket 850 x 850mm 120 120
Wire basket 600 x 600mm 240 120

Minimum density masonry supported walls – 650kg/m3 300mm bag length to be laid horizontally in wall
void. Bags should be laid centrally within all wall thicknesses.
*Product performance is dependent on matching performance of plasterboard wall system. Void in plasterboard should be fully ‘framed out’
with steel studs or similar 300mm bag length to be laid horizontally in wall void. Bags should be laid centrally within wall thicknesses.

Approved service penetrations

Steel and copper pipes not exceeding 100mm OD. Multi-core power cables not exceeding 25mm diameter.
Multi-core signal PVC sheathed cables not exceeding 11mm diameter. CAT5 or CAT5E communication cables
not exceeding 6mm diameter. Fibre optic cables not exceeding 6mm diameter. Perforated steel cable trays
carrying single cables (as above) or bunched in bundles, no more than 50mm overall diameter with each bundle
separated by at least 40mm. Steel trunking not exceeding 150 x150mm (through floor seals only) containing
single cables (as above) or bunched in bundles, no more than 50mm overall diameter with each bundle
separated by at least 40mm. Remaining void within trunking should be fully sealed with Intumescent Pillows.

Technical information
Standards and approvals
FIREPRO® Intumescent Pillows have been tested in accordance with BS EN 1366 Part 3: March 2009
achieving fire resistance (integrity) of up to 4 hours and insulation performance of 2 hours.

Product information

Property Description
Length 300mm
Width 50, 100, 150 & 200mm
Thickness 30mm
Fire resistance Up to 4 hours integrity

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Installation
Installation in floors
1. Make a basket using galvanised steel mesh (50 x 50mm squares x 2.5mm wire diameter) to sit into the
hole in the floor slab. There should be a minimum 50mm overlap onto the surrounding floor slab or
wall. Mechanically fix to top of floor slab or wall.
2. Lay Intumescent Pillows standing on end into the wire basket. Pack the pillows tightly into the basket
around the penetrating services.
3. For electrical trunking, remove the lid and install a pillow inside so that it aligns with the depth of the
floor. Replace the lid on the electrical trunking.
4. Lay a sheet of the galvanised steel mesh over the basket and tie together using steel wire.

Installation in walls
1. Push the first Intumescent Pillow into the hole to be filled, so that the longest dimension (300mm long)
spans across the wall.
2. For electrical trunking, remove the lid and install a pillow inside so it aligns with the depth of the wall.
replace the lid on the electrical trunking.
3. Pack the hole tightly with additional Intumescent Pillows until it is full.

For plasterboard partitions, the hole must be framed out using suitable stud noggins prior to installing
the Intumescent Pillows.

Installation of service penetrations

All penetrating services should be at least 100mm apart and located within the pillows at least 50mm
from the surrounding aperture. Due to the nature of the penetrating service eg. steel or copper pipes,
the fire insulation performance may be reduced. All penetrating services should be independently
supported within 1m of the pillows, either side of the exposed edge / face of the pillows. For cables
supported on trays passing through floor seals, the independent supports should be fixed to the trays
and the cables clamped securely to the trays. Plastic conduits or trunking should be cut short by at least
100mm either side of pillow seal.

Coverage

Table 4
Estimating quantities

Pillow size (mm) Approximate number

300 x 200 x 30 165 per m2 opening
300 x 150 x 30 220 per m2 opening
300 x 100 x 30 330 per m2 opening
300 x 50 x 30 660 per m2 opening

Specification clauses
FIREPRO® Intumescent Pillows are associated with the following NBS clauses:
P12 Fire stopping systems
• 345 Intumescent pillows

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FIREPRO®
MULTI-CABLE FIRESTOP

Advantages
• Simple to install

• Cables can be easily added/removed

• No de-rating of cables required

• Maintenance free

• Dry installation

Description Applications
Multi-Cable Firestop is compressible fire FIREPRO® Multi-Cable Firestop has
retardant foam which is laminated both been developed to provide fire
sides with a graphite based intumescent protection in all electrical trunking and
polymer. Multi-Cable Firestop is cable trays at the junction in which these
supplied in sections measuring 60mm services pass through the compartment
wide x 25mm thick x 1000mm long. wall. FIREPRO® Multi-Cable Firestop can
be used where electrical services pass
through both walls and floors providing
up to 4 hours fire resistance.

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Performance
Fire performance
Width of Maximum Fire resistance integrity (mins)
fire stop void height
for each (mm) Seal in Seal in a Seal in a
Services and Surrounding Coated (no. of fire masonry plaster- concrete
support penetration seal Batt (mm) stop plies) wall board wall floor
Cables Single 60mm 25(1) 180 180
(see note 1) secured ROCKWOOL
60 55(2) 120 120
to appropriately Ablative Coated
supported perforated Batt 80(3) 120 n/a
steel cable trays/
ladders Double 60mm 25(1) 240 60 240
ROCKWOOL 55(2) 240 60 240
60
Ablative Coated
Batt 80(3) 240 60 n/a

Cables (see note 1) Double 60mm

within PVC trunking ROCKWOOL
(max. 100 x 100mm) Ablative Coated 60 100(1) 240 60 -
Batt with no air
gap

Fire performance - Service penetration requirements

1. Suitable for copper cored / PVC sheathed and insulated power cables up to 12mm diameter, secured
on perforated trays/ladders or within PVC trunking passing through both walls and floors.
2. Cables and trays must be supported within 500mm on both sides of the seal.
3. Maximum of 3 layers of cables, each layer sealed with the Multi-Cable Fire stop.
4. The aperture width cut from the ablative Coated Batt should match the width the cable tray or PVC
trunking (maximum 100mm).
5. There must be a minimum of 100mm width of ablative Coated Batt between the penetration and the
edge of the main aperture within the supporting construction.
6. Maximum depth filled must not exceed 60mm.

Technical information
Standards and approvals
FIREPRO® Multi-Cable Firestop has been tested to BS 476: Part 20: 1987 and can provide up to 4 hours
fire protection in joints.

Acoustic Intumescent Sealant is third party accredited through IFC and Certifire.

Product information
Property Description
Length 1000mm
Width 60mm
Thickness 25mm
Fire resistance Up to 4 hours

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Installation
• Where a single Multi-cable Firestop is installed in fire-resisting walls (which will require fire resistance
from either side), the Ablative Coated Batt and Multi-cable Firestop should be fitted centrally within the
thickness of the wall. Twin layer Batts/Seals with an air gap should be aligned with each face of the wall.
• If a wall/floor does include a decorative finish, such as plaster, the Ablative Coated Batts must not be
installed flush with the surface of this decorative finish; it must be recessed, to remain aligned with the
face of the ‘solid’ construction.
• Where the Multi-cable Firestop is installed in fire-resisting floors, it shall be positioned approximately
15mm from the upper surface of the slab.
• Limitations and specifications for the construction of associated walls, partitions, and floors shall be as
defined in Appendix K.
• Cables must be secured to perforated cable trays, which must be fully supported within at least500mm
of both sides of the construction element; and using a support system that will remain effective under
fire conditions. Cable trays may penetrate horizontal or vertical construction elements.
• Cables may also be included within PVC trunking, which must be fully supported within at least 500mm
of both sides of the construction element; and using a support system that will remain effective under
fire conditions. PVC trunking may only penetrate walls. The lid of the trunking should be cut within 100-
150mm of the Ablative Coated Batt barrier to facilitate the installation of, or access to, cables and the
Multi-cable Firestop within the trunking.
• Only one single layer of cables may be included on each cable tray, or within the trunking, prior to
application of the multi-cable firestop material. Additional cables may be included between extra
sections of Multi-cable Firestop, if necessary; but only one single layer of cables may be included
between each subsequent section of Multi-cable Firestop material, where included.
• Over-compression of the seal can cause lateral expansion or misalignment of the activated strips; and
the seals should be installed carefully, with consideration to the layers/thickness of cables.
• Maximum diameter of any cable is 12mm, and only power cables, of the type with multi-core copper
conductor and PVC insulation/sheath, are approved.
• The aperture in the Ablative Coated Batt must match the width of the perforated cable tray.
• The section(s) of Multi-cable Firestop must extend over the full width of the aperture within the Ablative
Coated Batt; i.e. to fill the aperture and the tray.

Figure 1 Figure 2

Specification clauses
FIREPRO® Multi-Cable Firestop is associated with the following NBS clauses:
P12 Fire stopping systems
• 330 Fire stop laminate

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FIREPRO®
INTUMESCENT PUTTY PADS

Advantages
• Available for single & double sockets

• Up to 2 hours fire resistance

• Reduces noise transfer

• Pre-cut for simple installation

• Maintenance free

Description Applications
Intumescent Putty Pads are Intumescent Putty Pads are designed for
manufactured from a red non-setting, (but not limited to) effecting a fire and
flexible silicone based intumescent acoustic seal around plastic or metal
polymer. They will not harden, crack or electrical socket boxes. Using the putty
dry out with age. pads removes the need to install time-
consuming baffle boxes.
The intumescent properties activate as
temperatures reach 200°C, restricting Under fire conditions the intumescent
the passage of fire and smoke. pad expands to fill the void left by
the burnt out electrical socket box,
External socket Intumescent Putty preventing the spread of fire through
Pads provide a fast, efficient and clean the plasterboard wall. The intumescent
method of achieving the required fire putty can also be used for upgrading
and acoustic ratings as specified in the the acoustic performance of partitions
2006 edition of the Building Regulations where electrical sockets boxes have
approved document part E and B, penetrated the wall, reducing room-to-
sections 7 and 7.12 b. room noise transfer.

170mm 230mm

50mm 70mm 50mm 50mm 130mm 50mm

50mm

50mm
170mm

170mm
70mm

70mm
50mm

70mm

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Performance
Fire performance
Tested to BS 476 Part 20:1987/EN1366-3, Acoustic Intumescent Putty Pads offer up to 2 hour fire
resistance.

Acoustic performance
Measurement of airborne sound insulation was made in accordance with BS EN ISO 140-3:1995. Single
number quantities were calculated in accordance with BS EN ISO 717-1:1997.

Intumescent Putty Pads (Internal socket) offer a weighted sound reduction index of up to 67db. Tests
were conducted by BRE Acoustics who hold UKAS accreditation for the measurement of sound insulation
in the field and the laboratory. The measurements were conducted using the procedures accredited by
UKAS.

Technical information
Product information
Property Description
Suitable socket size Single & double gang
Suitable socket type Internally & externally mounted
Activation temperature 200°C
Application temperature 0°C to 40°C
Acoustic performance Up to 67 dB
Shelf life Up to 24 months
Fire resistance Up to 2 hours

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Installation
1. Remove the socket plate.
2. To ensure a high-quality seal, ensure the socket box is clean, dry and free from any dirt and dust.
3. Remove the protective paper from one side of the pad and align the pad so that it fits centrally over
the switchbox. (can be installed to either the inside or the outside of the socket, depending on the
fitting method / type of socket).
4. Firmly press and mould the pre-formed putty pad into the back of the box and around the cables
ensuring the pad perimeter is sufficiently bonded.
5. Remove the remaining protective paper and trim off any excess material to leave a neat finish.
6. Replace and secure the socket plate.

Figure 1

Figure 2 Figure 3

Specification clauses
FIREPRO® Intumescent Putt Pads are associated with the following NBS Clause:
P12 Fire stopping systems
• 350 Intumescent Putty

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FIREPRO®
FIRESTOP PIPE COLLARS

Advantages
• Simple to install

• Water resistant

• Maintenance free

• Available to suit pipe sizes ranging from 32 to

315mm O.D.

• Available from order in 48 hours

Description Aperture around

pipe made good with
ROCKWOOL Firestop
Tested to BS476 Part 20, Firestop Pipe Compound or Acoustic
Intumescent Sealant
Collars provides up to 4 hours fire
protection. Collars fixed to both sides
of wall to stop fire spread
Firestop Pipe Collars consist of a in both directions

corrosion resistant powder coated steel

sleeve, containing a flexible graphite
FIREPRO® Firestop Pipe
based intumescent liner manufactured Collar
to suit the pipework to be firestopped.
Integral toggles are opened up and the Solid wall
collar is simply fitted around the plastic
pipe. Figure 1
The toggles are closed and the collar is
pushed flush to the surface of the wall
or underside of floor. The collar is then
securely fastened to the structure by
means of fire resistant fixings threaded
through fixing tabs.

Gaps of up to 15mm between the

substrate and service pipework should
be filled with ROCKWOOL Acoustic
Intumescent Sealant.

For gaps greater than 15mm wide

ROCKWOOL Firestop Compound can
be used. Under fire conditions the
intumescent material within the collar
expands, crushing the pipework and fill Figure 2
the void left by the pipework.

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Performance
ROCKWOOL Firestop Pipe Collars and Palm Collars have been tested according
to either BS476 Pt 20 or EN1366-3. The independently prepared assessment, detailing the full scope of
fire performance, is available from the ROCKWOOL Technical Solutions Team.
ROCKWOOL Firestop Pipe Collars provide up to 4 hours fire resistance integrity and insulation for PVC, cPVC, uPVC,
PE, PP, MDPE and HDPE pipes up to a maximum 7mm wall thickness, for pipes from 32mm to 160mm. Collars
may also be fitted to plastic pipes constructed from ABS or muPVC with a maximum outside diameter of 55mm.
ROCKWOOL Firestop Palm Collars can provide up to 4 hours fire resistance and are suitable for PVC and
PP pipes in solid walls.
The performance of the collar will be determined by the performance of the substrate, so should 2 hours
be the requirement of the collar then the substrate should be rated to no less than the collar.
For advice on particular types and sizes of pipes or particular applications, please refer to our standard
details pack available via www.rockwool.co.uk or contact the Technical Solutions Team on 01656 868490.
Table 1
Performance in masonry supporting walls

Maximum pipe Collar depth Fire resistance (mins)

Collar type O.D. (mm) (mm) Integrity Insulation
2 hour 32-55 60 120 120
82 60 120 120
110 60 120 120
160 60 120 120
4 hour 32-55 60 240 240
82 60 240 240
110 60 240 240
160 60 240 240

Table 2
Performance in plasterboard supporting walls

Maximum pipe Fire resistance (mins)

Collar type O.D. (mm) Collar depth (mm) Integrity Insulation
1 hour 32-55 60 60 60
82 60 60 60
110 60 60 60
160 60 60 60
2 hour 32-55 60 120 120
82 60 120 120
110 60 120 120
160 60 120 120

Table 3
Performance in concrete floors

Maximum pipe Fire resistance (mins)

Collar type O.D. (mm) Collar depth (mm) Integrity Insulation
2 hour 32-55 60 120 120
82 60 120 120
110 60 120 120
160 60 120 120
4 hour 32-55 60 240 240
82 60 240 240
110 60 240 240
160 60 240 240

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Table 4
Pipe Collar wall thickness

Approved wall thickness (mm)

Pipe diameter PVC HDPE PP ABS

(mm) Min Max Min Max Min Max Min Max
32 1.8 2.0 3.0 3.4 1.8 2.2 1.8 2.2
40 1.9 2.1 3.0 3.5 1.9 2.3 1.9 2.3
50 2.0 2.2 3.0 3.5 2.2 2.4 2.0 2.4
55 2.0 3.2 3.0 3.5 2.2 2.4 4.0 4.5
82 3.0 3.5 3.0 3.5 2.6 5.0 N/A N/A
110 3.2 3.6 4.2 5.0 3.4 5.3 N/A N/A
160 3.2 3.8 6.2 7.1 4.8 5.3 N/A N/A

Table 5
Performance of 60mm (depth) Palm Collar
Maximum Intumescent Fire resistance
pipe wall depth x (mins)
Maximum thickness thickness
Pipe material pipe O.D. (mm) (mm) Wall / floor Integrity Insulation
Polypropylene (PP) 200 7 60 x 24 Wall or floor 120 120
PVC or HDPE 200 6 60 x 24 Wall or floor 240 240

Table 6
Performance of 200mm (depth) Palm Collar
Maximum Intumescent Fire resistance
pipe wall depth x (mins)
Maximum thickness thickness
Pipe material pipe O.D. (mm) (mm) Wall / floor Integrity Insulation
PVC or HDPE 225 6 60 x 24 Surface mounted 240 240
(Two pieces) wall or floor
PVC or HDPE 250 6 60 x 24 Surface mounted 240 240
(Two pieces) wall or floor
PVC, cPVC, PE, 400 6 125 x 40 Surface mounted 120 120
MDPE, HDPE, uPVC wall or floor
Polypropylene (PP) 225 22 60 x 24 Surface mounted 120 120
(Two pieces) wall only
Polypropylene (PP) 225 22 60 x 24 Cast-in wall only 180 180
(Two pieces)

Polypropylene (PP) 250 22 60 x 24 Surface mounted 90 90

(Two pieces) wall only
Polypropylene (PP) 250 22 60 x 24 Cast-in wall only 180 180
(Two pieces)

Polypropylene (PP) 400 6 200 x 42 Surface mounted 120 120

wall or floor

Technical information
Maintenance
It is recommended that fire stopping is checked as part of the routine maintenance program to ensure
that it has not been damaged, displaced, etc.

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Installation
Installation of Pipe Collars in walls
1. Fill any annular gaps between the pipe and the substrate with either ROCKWOOL Acoustic
Intumescent Sealant (min 10mm depth) for annular gaps not exceeding 7.5mm or Firestop Compound
for gaps greater than 7.5mm.
2. Undo the toggle clip on the Firestop Pipe Collar and open it out.
3. Slide the Firestop Pipe Collar, with its fixing tabs pointing towards the face of the wall, around the
plastic pipe.
4. Lock the Firestop Pipe Collar around the pipe closing the toggle clip. Push the Firestop Pipe Collar
back on to the wall.
5. Fix the Firestop Pipe Collar to the wall by means of 32 x 8mm steel self-tapping screws, through the
fixing tabs (or fire rated fixings to suit the substrate).
6. Repeat for the other side of the wall if required.
Installation of Pipe Collars in floors
1. Fill any annular gaps between the pipe and the substrate with either ROCKWOOL Acoustic
Intumescent Sealant (min 10mm depth) for annular gaps not exceeding 7.5mm or Firestop Compound
for gaps greater than 7.5mm.
2. Undo the toggle clip on the Firestop Pipe Collar and open it out.
3. Slide the Firestop Pipe Collar, with its fixing tabs pointing up towards the face of the soffit, around the
plastic pipe.
4. Lock the Firestop Pipe Collar around the pipe closing the toggle clip. Push the Firestop Pipe Collar
back on to the soffit.
5. Fix the Firestop Pipe Collar to the soffit by means of 32 x 8mm steel self-tapping screws, through the
fixing tabs.
Installation of Palm Collars
1. Fill any annular gaps between the pipe and the substrate with either ROCKWOOL Acoustic
Intumescent Sealant (min 10mm depth) for annular gaps not exceeding 7.5mm or Firestop Compound
for gaps greater than 7.5mm.
2. Slide the Palm Collars around the pipe with the fixing tabs facing the solid wall/floor surface.
3. Secure the collar to the pipe using the either the steel toggles (60mm depth collars) or clasps (200mm
depth collars).
4. Surface mount the collar to the solid wall/floor substrate with screws/bolts fitted through the fixing
tabs. Fixings used to secure the collar should a minimum of 50mm in length.
5. Repeat for both sides of the solid wall.
Cast in applications
Where ‘cast-in’ applications are approved, the Palm Collar is fitted in an enlarged hole within the
structure, ensuring that at least 30mm of the collar is exposed on each face of the wall. The annular gap
around the pipe collar is then filled with ROCKWOOL Firestop Compound.

Specification clauses
FIREPRO® Firestop Pipe Collars are associated with the following NBS clauses:
P12 Fire stopping systems
• 370 Pipe collar: Concealed Intumescent sealant
• 380 Pipe collar: Surface mounted intumescent

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FIREPRO®
INSULATED FIRE SLEEVES

Advantages
• Quick, simple and accurate installation

• Maintains pipe insulation at penetration points

• Supplied with integral vapour barrier

• No mastic or ancillaries required

• Excellent thermal and acoustic insulation

Description Applications
Insulated Fire Sleeves are a unique Insulated Fire Sleeves should be
combination of ROCKWOOL stone wool installed to the same thickness as the
and graphite intumescent. pipe insulation (min 25mm thick). For
uninsulated pipes, a thickness of 25mm
Supplied with a factory applied
is required to maintain the fire resistance
reinforced aluminium foil facing.
of the wall or floor.
When thermally insulated plastic
pipes pass through fire resisting walls
and floors, the insulation is normally
Performance
removed at the point of penetration Standards and approvals
to enable standard pipe collars and Insulated Fire Sleeves have been
wraps to close the resulting void when independently tested and assessed
the plastic softens and melts due to to BS 476: Part 20 for periods of
the effects of a fire. However, the up to 2 hours in concrete walls and
removal of this insulation may result in floors, plasterboard partitions and
the formation of condensation on cold ROCKWOOL Ablative Coated Batts.
pipework or heat loss from hot pipes.
Fire
Insulated Fire Sleeves avoid this Service Temperature and Limiting
problem by providing both fire stopping Service Temperature - Insulated Fire
and thermal insulation in a single Sleeves are used to fire stop pipework
product. operating at temperatures between 0°C
and 180°C. At low temperatures, care
Insulated Fire Sleeves are intended for
should be taken to maintain the vapour
use on copper, steel and most types of
barrier.
plastic pipes, trunking and conduits to
provide up to 2 hours fire resistance.
Insulated Fire Sleeves can be used on
numerous division types and under fire
attack, expand both inwards to choke
the plastic service penetration and
also outwards to seal gaps between
the sleeve and the surrounding
construction.

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Table 1
Fire resistance (FR) performance - ducting, trunking and conduits
Supporting FR integrity FR insulation
construction (minutes) (minutes)
Wall
Max size thickness
Service type Material W/D (mm) range (mm) Wall Floor Wall & floor Wall Floor Report
Rectangular
PVC Other sizes available - 1.6 to 3 M/PB Concrete 120 90 120 1
vent ducts see ROCKWOOL Oval
Insulated Firesleeve
Square
PVC Data Sheet 3 M/PB Concrete 120 90 120 1
trunking
Cable Up to 55
PVC 3 M/PB Concrete 120 90 120 1
conduit diameter

Table 2
Fire resistance (FR) performance - metal and plastic pipes in masonry, plasterboard or concrete supporting construction
FR FR
Supporting integrity insulation
construction (minutes) (minutes)
Wall Wall
Service Min thickness Max thickness Wall &
type Material diameter (mm) diameter (mm) Wall Floor floor Wall Floor Report
Copper
Metal pipes
Mild steel 22 2.5 165 14.2 M/PB Concrete 120 0 0 1
(uninsulated)
Stainless steel
PVC/UPVC 55 3.0 160 4.2 M/PB/CB Concrete 120 120 120
Pipes
PVC/UPVC 160 3.0 110 4.2 M/PB Concrete 120 90 90 1
(plastic)
Polybutylene 12 2.0 28 3.5 M/PB/CB Concrete 120 120 120
A minimum thickness of 25mm is required for uninsulated pipes. 25 to 100mm available to match insulation on other pipes. Manufactured to fit pipe diameters of 15 to 169mm
1 = Chilt/A12265 - 2 = Chilt/A08152 Rev D - M = Masonry - PB = Plasterboard - CB = Ablative Coated Batt

Table 3
Fire resistance (FR) performance of plastic pipes in FIREPRO® Ablative Coated Batt

Pipe outer Wall FR integrity (minutes) FR insulation (minutes)

diameter thickness 50mm 2 x 50mm 50mm 2 x 50mm
Service type Material (mm) (mm) Coated Batt Coated Batt Coated Batt Coated Batt
Pipes
Polybutylene 15-28 2.5 60 120 60 120
(plastic)
HDPE 40 3 60 120 60 120
PVCu 43 1.8 60 120 60 120
PVC 55 2 60 120 60 120
HDPE 56 2.3 60 120 60 120
ABS 57 4 60 120 60 120
PVC, PVCu 82 3.2-4.0 60 120 60 120
HDPE 90 3.5 60 120 60 120
PVC, PVCu 110 4.3 60 120 60 120
HDPE 110 5 60 120 60 120
ABS 110 5 60 120 60 120
PVC, PVCu 160 3.2-4.5 60 120 60 120
HDPE 160 6.2 60 120 60 120
ABS 160 6.7 60 120 60 120
For information regarding alternative pipe sizes or types, or for help regarding achieving higher integrity and insulation ratings.
Please contact ROCKWOOL Technical Solutions Team for further assistance.

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Acoustics
The use of Insulated Fire Sleeves can considerably reduce the noise emission from noisy pipework.
ROCKWOOL Insulated Fire Sleeves have been tested to provide up to Rw 49 dB.

For higher standards of acoustic insulation, it is recommended that an increased length of the pipework
either side of the compartment wall or floor is insulated with ROCKWOOL Techwrap 2 or Techtube.

Product information
Dimensions
Insulated Fire Sleeves are supplied 300mm long. They are manufactured to fit a range of standard pipe
sizes, from 17mm to 169mm O.D. and in a standard thickness of 25mm. Other pipe sizes and thicknesses
may be available to special order.

Installation
Installation instructions
Insulated Fire Sleeves are supplied 300mm long and are simply cut to the desired length and as a
minimum, be cut flush with both faces of the wall/floor. When used in conjunction with PVC services or
ROCKWOOL Ablative Coated Batts, they are required to extend beyond the face of the wall/floor. For
details of how far they need to extend please refer to specification clause 2.

Maintenance
To maintain thermal efficiency, the Insulated Fire Sleeves should tightly abut any existing pipe insulation
and where this is foil faced, all joints must be sealed with self-adhesive class O foil tape.

Other install info e.g. ancillaries

No specialist tools or ancillary materials are required for the fitting of Insulated Fire Sleeves. Insulated Fire
Sleeves can accommodate irregularities in the division opening and the pipe O.D. of up to 15mm.

Multiple pipe penetrations can be accommodated in conjunction with Ablative Coated Batts.

A minimum thickness of 25mm is required for uninsulated pipes. Thicknesses of 25 to 100mm available to
match insulation already installed on pipework. Manufactured to fit pipe diameters of 15 to 169mm.

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Fire-rated wall or floor

25mm protrusion enable

sealing of outer foil facing
onto adjacent insulation

Service pipe as detailed

in scope of use

ROCKWOOL FIREPRO®
insulated Fire Sleeve

ROCKWOOL® pipe
insulation

T-25mm minimum
insulation wall thickness

Specification clauses
1. Supporting construction designation:- Floors: Cast concrete between 1100 and 2400kg/m3 density.
M=Masonry between 600 and 1500kg/m3 density.
PB= Plasterboard clad steel or timber stud partitions with fire resistance at least the same as the Fire
Sleeve performance.
CB= ROCKWOOL 50 or 60mm thick Ablative Coated Batt.
2. Insulated Fire Sleeves should project by at least 25mm beyond the visible face of each Coated Batt.
There must be at least 50mm width of Coated Batt between any fire sleeve and the edge of the
aperture and also between individual Fire Sleeves.
3. If gaps exceed 15mm around the aperture and the sleeve, the gap should be filled with ROCKWOOL
Acoustic Intumescent or FIREPRO® Firestop Compound. If gaps exceed 8mm between the service
and the sleeve, these can be infilled, locally where the service penetrates the aperture, with the
Acoustic Intumescent Sealant.
4. The installed length of any Insulated Fire Sleeve shall be at least 60mm.

NBS clauses

FIREPRO® Insulated Fire Sleeves are associated with the following NBS clauses:

P12 Fire stopping systems

• - 375 Pipe collar: Insulated Wrap

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FIREPRO®
INTUMESCENT PIPE WRAPS

Advantages
• Simple to install with no mechanical fixings required

• Available to suit pipe sizes up to 160mm O.D.

• Fit most electrical trunking sizes

• Water resistant

Description Applications
Pipe Wraps comprise layers of a • Fire stopping plastic pipe
graphite based intumescent sheet penetrations in solid walls and floors
encapsulated in a polythene sheath. only
All Pipe Wraps are supplied in correct • Can be applied to PVC, UPVC,
lengths to suit the pipe diameter. Polypropylene, MDPE & HDPE pipe
materials
• Electrical trunking penetrations

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Performance
Fire performance
ROCKWOOL Intumescent Pipe Wraps can provide up to 4 hours fire protection to all plastic pipework
and electrical trunking where they pass through fire rated walls and floors.
Fire performance in masonry supporting wall & concrete floors

Maximum pipe Maximum pipe Pipe wrap Pipe wrap Fire resistance – Fire resistance –
O.D. (mm) wall thickness (mm) width (mm) thickness (mm) integrity (min) insulation (min)
55 7 50 4 120 120
55 7 50 8 240 240
82 7 50 8 120 120
82 7 75 8 240 240
110 7 50 8 120 120
110 7 100 8 240 240
160 7 100 20 240 240

Product information

Property Description
Pipe diameter Up to 160mm O.D.
Width 50, 75 & 100mm
Thickness 4mm
Fire resistance Up to 4 hours

Technical information
Standards and approvals
FIREPRO® Intumescent Pipe Wraps have been tested to BS 476 Part 20:1987.
FIREPRO® Intumescent Pipe Wraps are third party accredited through IFC and Certifire.

Installation
The product is intended to be wrapped around the outside diameter of the pipework or trunking and
is secured by means of a self-adhesive strip. The Intumescent Pipe Wrap is then positioned within the
compartment wall or floor so that the edge of the product is left exposed at the face of the wall or soffit.
The Intumescent Pipe Wrap is then sealed into the structure with ROCKWOOL Firestop Compound (See
Figure 1 & 2).
Under fire conditions, the intumescent material expands against the structure and fills the void left by the
burnt out plastic.
For walls it may be necessary to fit two wraps depending on the fire risk areas concerned and if the wall
thickness exceeds 150mm.
Where pipes are insulated, please refer to the Insulated Fire Sleeve data sheet.
Intumescent Pipe Wraps are used to prevent fire penetration in plastic pipes that pass through solid walls
and floors for a specified period of up to 4 hours. They are manufactured as a sealed unit to the correct
length and width to suit the pipe diameter and fire rating.
Note: Intumescent pipe wraps are not suitable for use in coated batts or dry wall situations.

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Figure 1 Figure 2
Intumescent Pipe Wrap sealed into compartment Intumescent Pipe Wrap sealed into a compartment
floor with ROCKWOOL Firestop Compound wall with ROCKWOOL Firestop Compound

Installation instructions
1. Check that the pipe surface is clear of mortar.
2. Ensure that the appropriate pipe wrap is installed to suit the outside pipe diameter and required fire
rating.
3. Wrap around pipe and fix with integral self-adhesive strip.
4. Slide into position ensuring that the bottom edge is exposed in a floor slab and both edges are
exposed in a wall. Two wraps may be necessary when the wall thickness exceeds 100mm (See Figure
3).
5. Seal the pipe wrap into the structure with ROCKWOOL Firestop Compound.

Pipe Wrap positioned

level with underside
of the floor slab

Single Pipe Wrap in

position in wall

Figure 3

Specification clauses
ROCKWOOL Intumescent Pipe Wraps are associated with the following NBS clauses:

P12 Fire stopping systems

• 375 Pipe Collar – Insulated Wrap

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INTUMESCENT
PIPEWRAP ROLL

Advantages
• Simple to install

• No mechanical fixings required

• Water resistant

• Maintenance free

• Supplied as a 25m long roll in box dispenser

• Available to suit pipes up to 200mm o.d.

• Comprehensively tested

• Available from stock

Description Installation
Intumescent Pipewrap Roll comprises The product is intended to be wrapped
an intumescent material made from around the outside diameter of
elastomeric thermoplastic polymers combustible pipework or the outside
combined with active components that diameter of insulation on pipework and
provide a high volume expansion and is secured by means of the integral self-
pressure seal in the event of a fire. adhesive strip.
Intumescent Pipewrap Roll is supplied 1. Check that pipe surface and substrate
on 25m roll. The product is 40mm wide are clean and clear of any debris.
and 2mm thick, with integral adhesive
2. Install the correct number of wraps
tape for securing around the pipe.
for the service type and ensure the
Depending on the service to be
correct number of layers of wrap as
protected and the fire resistance
detailed in the performance section of
required, multiple layers of wrap may be
this data sheet.
required, the exact number and positioning
of the product is detailed in the 3. Install the wrap into the wall or floor
performance section of this data sheet. recessed by 5mm from the face of the
wall or floor.
Applications 4. Fill the annular space with
ROCKWOOL® FIREPRO® Acoustic
Install Intumescent Pipewrap Roll to
Intumescent Sealant to seal off the 5mm
provide up to 4 hours fire protection to
gap to the edge of the substrate.
tested plastic pipework and insulated
pipes where they pass through fire 5. Maintain a record of the installation.
rated walls and floors. Installation to be
Under fire conditions, the intumescent
fully in accordance with manufacturer’s
material expands against the structure
instructions.
and fills the void left by the burnt out
plastic and/or insulation.
Maintenance
During normal use, no maintenance is
required.

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Technical information
Table 1 - Pipes through suitable flexible walls

Classification Substrate Wrap dimensions

Insulation
Pipe wall type and Annular
Service Diameter thickness thickness Insulation Wall / space Depth No. of
type (ø) (mm) (mm) (mm) fitting floor type (mm) (mm) layers Supports Capping Classification
100min See table
Thickness 400mm
pVC ≤200 ≤9.6 N/A N/A flexible 40 Φ 5 in data U/C EI120
of wrap & 500mm
wall sheet
100min See table
Thickness 400mm &
PP ≤200 ≤18.2 N/A N/A flexible 40 Φ 5 in data U/C E120,EI90
of wrap 500mm
wall sheet
100min See table
thickness 400mm &
PE ≤200 ≤18.4 N/A N/A flexible 40 Φ 5 in data U/C EI90
of wrap 500mm
wall sheet
100min See table
thickness 400mm &
PE 50 ≤4.6 N/A N/A flexible 40 Φ 5 in data U/C EI120
of wrap 500mm
wall sheet
100min See table
thickness 400mm &
PE 200 18.4 N/A N/A flexible 40 Φ 5 in data U/C EI120
of wrap 500mm
wall sheet

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Table 2 - Pipes in concrete floors

Classification Substrate Wrap dimensions

Insulation
Pipe wall type and Annular
Service Diameter thickness thickness Insulation Wall / space Depth No. of
type (ø) (mm) (mm) (mm) fitting floor type (mm) (mm) layers Supports Capping Classification
See table
150mm Thickness 400mm &
pVC ≤200 ≤9.6 N/A N/A 40 Ϯ 5 in data U/C EI60
rigid floor of wrap 500mm
sheet
See table
150mm Thickness 400mm &
PP 50 2.9 N/A N/A 40 Φ 5 in data U/C EI120
rigid floor of wrap 500mm
sheet
See table
150mm Thickness 400mm &
PP 200 18.2 N/A N/A 40 Φ 5 in data U/C E120, EI90
rigid floor of wrap 500mm
sheet
See table
150mm Thickness 400mm &
PE ≤200 ≤11.4 N/A N/A 40 Φ 5 in data U/C EI120
rigid floor of wrap 500mm
sheet
See table
150mm Thickness 400mm &
PVC ≤200 ≤9.6 N/A N/A 40 Ϯ 5 in data U/C EI60
rigid floor of wrap 500mm
sheet
See table
150mm Thickness 400mm &
PVC 200 9.6 N/A N/A 40 Ϯ 5 in data U/C E240, EI180
rigid floor of wrap 500mm
sheet
See table
150mm Thickness 400mm &
PVC 50 3.7 N/A N/A 40 Ϯ 5 in data U/C E240, EI180
rigid floor of wrap 500mm
sheet
See table
150mm Thickness 400mm &
PVC 50 2.4 N/A N/A 40 Ϯ 5 in data U/C EI240
rigid floor of wrap 500mm
sheet
See table
150mm Thickness 400mm &
PP ≤200 ≤18.2 N/A N/A 40 Φ 5 in data U/C EI120
rigid floor of wrap 500mm
sheet
See table
150mm Thickness 400mm &
PP ≤50 ≤6.9 N/A N/A 40 Φ 5 in data U/C EI240
rigid floor of wrap 500mm
sheet
See table
150mm Thickness 400mm &
PP 200 4.9 N/A N/A 40 Φ 5 in data U/C EI240
rigid floor of wrap 500mm
sheet
See table
150mm Thickness 400mm &
PE ≤200 ≤18.2 N/A N/A 40 Φ 5 in data U/C EI240
rigid floor of wrap 500mm
sheet

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Table 3 - Pipes in suitable flexible wall using pattress installation of 50mm FIREPRO® ACB

Classification Substrate Wrap dimensions

Insulation
Pipe wall type and Annular
Service Diameter thickness thickness Insulation Wall / space Depth No. of
type (ø) (mm) (mm) (mm) fitting floor type (mm) (mm) layers Supports Capping Classification
100min
Copper / Elastomer- Thickness 2 layers of 400mm &
≤159 ≤14.2 CS flexible 40 Φ U/C E120, EI60
steel ic 13-25 of wrap 2mm 500mm
wall
100min
Copper / Phenolic Thickness 2 layers of 400mm &
≤108 ≤14.2 CS flexible 40 Φ U/C EI90
steel 25-40 of wrap 2mm 500mm
wall
100min
Copper / Phenolic Thickness 2 layers of 400mm &
42 1 CS flexible 40 Φ U/C EI120
steel 25-40 of wrap 2mm 500mm
wall
100min
Copper / Phenolic Thickness 2 layers of 400mm &
≤108 ≤14.2 CS flexible 40 Φ U/C EI120
steel 40 of wrap 2mm 500mm
wall
90min
Copper / Elastomer- thickness 2 layers of 400mm &
42 1 CS flexible 40 Φ U/C EI120
steel ic 13-25 of wrap 2mm 500mm
wall
100min
Copper / Elastomer- Thickness 2 layers of 400mm &
≤159 ≤14.2 CS flexible 40 Φ U/C EI90
steel ic 25 of wrap 2mm 500mm
wall
100min See table
thickness 400mm &
PVC ≤200 ≤9.6 N/A N/A flexible 40 Φ 5 in Data U/C EI60
of wrap 500mm
wall Sheet
100min See table
thickness 400mm &
PP ≤200 ≤18.2 N/A N/A flexible 40 Φ 5 in Data U/C EI60
of wrap 500mm
wall Sheet
100min See table
thickness 400mm &
PE ≤200 ≤18.4 N/A N/A flexible 40 Φ 5 in Data U/C EI60
of wrap 500mm
wall Sheet
Mineral 100min
Copper / thickness 2 layers of 400mm &
42 1 wool CS flexible 40 Φ U/C EI120
steel of wrap 2mm 500mm
20-50 wall
Mineral 100min
Copper / thickness 2 layers of 400mm &
≤159 ≤14.2 wool CS flexible 40 Φ U/C EI90
steel of wrap 2mm 500mm
20-50 wall
Mineral 100min
Copper / thickness 2 layers of 400mm &
≤108 ≤14.2 wool CS flexible 40 Φ U/C EI90
steel of wrap 2mm 500mm
20-50 wall

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Table 4 - Pipes in suitable flexible walls in double layer 50mm FIREPRO® ACB

Classification Substrate Wrap dimensions

Insulation
Pipe wall type and Annular
Service Diameter thickness thickness Insulation Wall /floor space Depth No. of
type (ø) (mm) (mm) (mm) fitting type (mm) (mm) layers Supports Capping Classification
100min
copper / Elastomer- thickness 2 Layers of 400mm &
≤159 ≤14.2 CS flexible 40 Φ U/C EI60
steel ic 13-25 of wrap 2mm 500mm
wall
100min
Copper / Phenolic thickness 2 Layers of 400mm &
≤108 ≤14.2 CS flexible 40 Φ U/C E120, EI60
steel 25-40 of wrap 2mm 500mm
wall
100min
Copper / Elastomer- thickness 2 Layers of 400mm &
42 1 CS flexible 40 Φ U/C E120,EI90
steel ic 13-25 of wrap 2mm 500mm
wall
100min
Copper / Phenolic thickness 2 Layers of 400mm &
42 1 CS flexible 40 Φ U/C E120,EI90
steel 25-40 of wrap 2mm 500mm
wall
100min See table
Phenolic Thickness 400mm &
PVC ≤110 ≤6.6 CS flexible 40 Φ 5 in data U/C EI90
20-25 of wrap 500mm
wall sheet
100min See table
Elastomer- Thickness 400mm &
PVC ≤110 ≤6.6 CS flexible 40 Φ 5 in data U/C EI90
ic 13-25 of wrap 500mm
wall sheet
Mineral 100min
Copper / Thickness 2 Layers of 400mm &
≤159 ≤14.2 wool CS flexible 40 Φ U/C EI60
steel of wrap 2mm 500mm
20-50 wall

Key to Tables
ACB = Ablative Coated Batt
CS = Continuous Sustained
Φ = applied to both faces of seal
Ϯ = applied to upper face only
U/C = Upcapped / Capped

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Table 5 - Wrap configuration by size

Pipe O.D. (mm) No. of layers of wrap Total wrap thickness (mm)
40 1 2
55 2 4
63 2 4
75 2 4
82 2 4
90 3 6
110 3 6
125 4 8
160 4 8
200 5 10

Table 6 - Physical properties

Width 40mm
Length 25m
Thickness 2mm
Density 1.3Kg/m³
Volume expansion at 300°c 25 times
Shelf life 60 months

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FIREPRO® HIGH EXPANSION

INTUMESCENT SEALANT

Advantages
• Simple solution for sealing combustible pipes and
metal pipes with combustible insulation

• Suitable for both walls and floors

• Compatible with cPVC pipes

• Tested in multiple substrates

Description Applications
ROCKWOOL FIREPRO High Expansion
®
FIREPRO® High expansion Intumescent
Intumescent Sealant is water based Sealant is comprehensively tested for
acrylic sealant containing graphite. a wide range of applications which
In the event of a fire, the active include:
components provide a high volume
• Combustible pipes
expansion and pressure seal, closing off
the void left by combustible materials. • Metal pipes insulated with
combustible insulation
ROCKWOOL FIREPRO® High Expansion
Intumescent Sealant is supplied in • Other permanent services
310ml cartridges.

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Performance
Standards and approvals
FIREPRO® High Expansion Intumescent Sealant has been tested to BS EN 1366-3: 2009 and BS EN 1366-4:
2006 +A1:2010 and classified to EN 13501-2, providing up to 4 hours fire protection in joints up to 30mm.

FIREPRO® High Expansion Intumescent Sealant has been CE marked against ETAG026-2.

“FBC™ System Compatible indicates that this product has been tested, and is monitored on an ongoing
basis, to assure its chemical compatibility with FlowGuard Gold®, BlazeMaster® and Corzan® pipe and
fittings. FBC™, FlowGuard Gold®, BlazeMaster® and Corzan® are licensed trademarks of The Lubrizol
Corporation or its affiliates.”

FIREPRO® High Expansion Intumescent Sealant is third party accredited through IFC and Certifire.

This product has been authorised for use in LUL surface and sub-surface premises when installed in
accordance with this datasheet - please refer to the LUL Approved Product Register website
www.LU-apr.co.uk for specific details. LUL Ref. 2454.

Table 1
2 hour dry wall (min. 120mm thick)
Diameter Wall Annular Depth
Service penetration (Ø) thickness space (mm) (mm) Classification
Cables 21 N/A 20 25Ф EI 120 U/C
PVC pipes ⱡ 40 3 10 25Ф EI 120 U/C
PVC pipes ᴪⱡ 125 7.4 16 25Ф EI 120 U/C
HDPE 63 7.2 20 25Ф EI 120 U/C
HDPE 90 9.2 12.5 25Ф EI 120 U/C
ABS 90 6 12.5 25Ф EI 120 U/C
Copper / steel pipe with E 120/EI 90
60 0.8-14.2 20 25Ф
Armaflex 32mm CS U/C
Copper / steel pipes with
15 0.8-7 15 25Ф EI 120 U/C
Armaflex 16mm CS

Table 2
Wall with single 50mm FIREPRO® Ablative Coated Batt
Diameter Wall Annular Depth
Service penetration (Ø) thickness space (mm) (mm) Classification
Pvc pipes ⱡ 125 7.4 20 50 EI 30 U/C
Multi layer composite pipes 110 10 20 50 E45 EI30 U/C
500mm perforated cable tray* N/A N/A 20 50 EI 30
Medium cables* 47 N/A 20 50 EI 45

Table 3
Masonry wall (min. 150mm) or flexible wall (min. 100m) with double 50mm FIREPRO® Ablative Coated Batt
Diameter Wall Annular Depth
Service penetration (Ø) thickness space (mm) (mm) Classification
Pvc pipes ⱡ 125 7.4 20 25Ф EI 120 U/C
Multi layer composite pipes 110 10 20 25Ф EI 120 U/C
500mm perforated cable tray* N/A N/A 20 25Ф EI 120
Medium cables* 47 N/A 20 25Ф EI 120

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Table 4
Rigid floor (min. 150mm thick)
Diameter Wall Annular Depth
Service penetration (Ø) thickness space (mm) (mm) Classification
Electrical cables ɸ 80 N/A N/A 25 ↑ E120
Non sheathed electrical
24 N/A N/A 25 ↑ E180
cables ɸ
Telecom cables bundled ɸ up to 21 N/A N/A 25 ↑ E180
Copper / steel pipe with
159 14.2 20 25 EI 120 U/C
Armaflex 32mm cs ɸ
Copper / steel pipe with E240/ EI 60
41 14.2 20 25
Armaflex 16mm cs ɸ U/C
PP pipes ɸⱡ 110 10.7 20 25Ф EI 120 U/C
PP pipes ɸⱡ 50 2.1 20 25Ф EI 240 U/C
PE pipe ɸⱡ 40 4.1 20 25Ф EI 240 U/C
PE pipe ɸⱡ 125 11.4 20 25Ф EI 90 U/C
PVC pipe ɸⱡ 40 2 20 25Ф EI 240 U/C
PVC pipe ɸⱡ 114 8.1 20 25Ф EI 120 U/C

Table 5
Rigid floor (min. 150mm thick) with double 50mm FIREPRO® Ablative Coated Batt
Diameter Wall Annular Depth
Service penetration (Ø) thickness space (mm) (mm) Classification
PVC pipe ⱡ 50 7.4 20 25Ф EI 120 U/C
PVC pipe ⱡ 125 7.4 20 25Ф EI 120 U/C
Multi layer composite pipes 110 10 20 25Ф E120/EI 60 U/C
500mm perforated cable tray* N/A N/A 20 25Ф EI 120
Medium cables* 47 N/A 20 25Ф EI 120
Multi service as follows
(installed centrally in aperture)
PE pipe ɸⱡ 125 7.6 N/A 25Ф E120/EI 90 U/C
60 pipe with cables ɸ 21 N/A N/A 25Ф E120/EI 90 U/C

Table 6
Linear joints
Diameter Wall Annular Depth
Service penetration (Ø) thickness space (mm) (mm) Classification
PVC pipe ϖ 50 7.4 20 25Ф EI 120 U/C

Key to tables

ⱡ = See assessment for other pipe sizes and wall Ф = Applied to both faces of seal
thicknesses within field of application.
↑ = Applied to upper face only
*C= All cables coated with 2mm DFT (Dry Film
Thickness) of FIREPRO® ᴪ = Use RW4 as backing material, minimum 30mm
deep.
RW = Rigid Wall
ɸ = Use RWA45 as backing material, minimum
ACB = Ablative Coated Batt 100mm deep.

CS = Continuous Sustained ϖ = Use PE backing rod

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Technical information
Product information

Property Description
Form Ready to use thixotropic paste
Cartridge size 310ml
Curing system Water based
Specific gravity 1.5
Extrusion rate 350g/min
SAG ˂3min
Open time 30mins
Tack free time 60mins
Curing time 3 to 5 days
Shore (A) hardness 50
Solids >80%
Application temperature range +4°C to +35°C
Service temperature range -15°C to 70°C
Shelf life Up to 12 months when stored in unopened cartridges under cool,
dry conditions. Avoid Extreme Temperatures

Installation
All surfaces must be clean and sound, free from
dirt, grease and other contamination.

Prepare joint by cleaning as previously detailed

and insert backer if required. Cut nozzle to the
desired angle and gun firmly into the joint to give a
good solid fill to the required depth. Strike off the
sealant flush with the joint sides within five minutes
of application, before surface skinning occurs. A
small amount of shrinkage will occur on curing. If a
flush finish is required, fill the joint slightly proud of
the surface to allow for shrinkage.

Specification clauses
Important information
FIREPRO® High Expansion Intumescent Sealant is
The sealant is not intended for application
associated with the following NBS clauses:
on bituminous substrates or substrates that
• E40: Designed joints in in-situ concrete – 530 can exude certain oils and plasticizers or
Sealant solvents.
• F30: Accessories/sundry items for brick/block/ A high expansion intumescent sealant is
stone walling - 610 Movement joints with different to standard intumescent sealants,
sealants it is tested and installed within a defined
annular space between the service and the
• L10: Windows/rooflights/screens/louvres – 790 substrate. Please refer to the ROCKWOOL
Fire resisting frames Standard Details for a complete list of
• L20: Doors/shutters/hatches – 820 Sealant joints tested systems.
The sealant is not recommended for
• P12: Fire stopping systems – 395 Sealant-One
submerged joints or areas exposed to high
part fire resistance acrylic
abrasion.
The sealant is not suitable for food contact
or medical applications.

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ROCKWOOL® FIREPRO® - FIRE STOPPING

The ROCKWOOL technical solution team are Call the ROCKWOOL

technical solution team on
readily available to provide technical guidance 01656 868490 or
and advice on any aspect of the FIREPRO® range. email technical.solutions@
rockwool.co.uk

For our full suite of Firestopping Standard

Details, download the Standard Details
Guide at:
www.rockwool.co.uk/technical-resources/
product-documentation

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FIRE STOPPING
Section 2 – Cavity barriers & cavity firestops

Concealed spaces or cavities within the construction of a building can provide a clear path for fire and
smoke to spread. Cavity Barriers and Cavity Firestops provide two important functions:
Cavity barriers
Used to close the edges of cavities, around openings (e.g. windows) or to sub-divide extensive cavities/
voids in accordance with building regulations.
Cavity firestops
Used to continue the fire resistance of a compartment floor or wall within a cavity space or void e.g.
junction between a compartment floor and external wall or above a compartment wall within a ceiling or
roof void. It is important that the level of fire resistance achieved by the cavity firestop is equal to that of
the compartment wall/floor.
Whether its single storey dwellings or multiple occupancy high rise buildings, ROCKWOOL provide a
wide range of products and systems that have been tested for use as cavity barriers, cavity firestops or for
use in both functions.

FIREPRO® FIREPRO®
SP Firestop Soft Seal
System System

FIREPRO®
Fire Barrier
System

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CAVITY BARRIERS & CAVITY FIRESTOPS

Core Products

• Fire Barrier System • TCB Cavity Barrier

• Fire Barrier Slab • PWCB Cavity Barrier

• SP Firestop System
• SoftSeal System
• SP Firestop OSCB

Useful documents and standards

• ASFP Technical Guidance Document – TGD 17: Code of practice for the installation and
inspection of fire stopping systems in buildings

• ASFP Red Book: Fire stopping and penetration seals for the construction industry

• ASFP: Ensuing best practice for passive fire protection in buildings

• ASFP: On-site guide to installing fire stopping

• BS 476-20: Fire test on building materials and structures. Method for determination of the
fire resistance of elements of construction

• BS EN 1366-4: Fire resistance test for service installations. Linear joint seals

• BS EN 1363-1: Fire resistance tests. General Requirements

• BS EN 13501-2: Fire classification of construction products and building elements.

Classification using test data from resistance to fire tests, excluding ventilation services.

ASFP ( Association for Specialist Fire Protection) guidance documents can be sourced at www.asfp.org.uk

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FIRE BARRIER SYSTEM

Advantages
• Patented ‘quick-fit’ system for up to 1 hour
fire resistance

• Suitable for void heights up to 10.5 meters

• Provides airborne sound reduction

• Additional strength through wire mesh

reinforcement

• Service penetration data available

• Fire resistance of up to 2 hours

• Flexible, accommodates movement

Description Applications
ROCKWOOL Fire Barrier is comprised • Pitched roof voids
of stone wool and has a galvanised • Head of wall
wire mesh which is stitched to one
side. Foil faced options and double • Concealed ceiling spaces
sided wire mesh are also available. Fire • Multiple substrates
Barrier systems have been developed to
prevent the spread of flames and inhibit
heat and smoke through concealed
spaces in buildings and improve sound
reduction.

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CAVITY BARRIERS & CAVITY FIRESTOPS

Performance
Fire performance

Maximum Maximum
drop drop with
without additional
Rating support support Max Supporting
required frame frame width Integrity Insulation Install specification document
30 min 10.5m 30 15 Single 50mm layer
cavity 3m 20m FB, vertical joints butt 116911
barrier - 60 15 jointed.
Single 60mm layer
(plain or foil face)
30 min
with a minimum
fire 6m N/A 20m 60 30 11970
100mm overlapped
barrier
and stitched joints on
vertical joints*.
60 min 2 layers of 50mm
fire 6m 20m 60 60 back to back butt 116912
barrier jointed with staggered
10.5m
90 min vertical joints between
fire 3.5m 20m 90 90 the back to back 51812
barrier layers.
2 layers of 60mm
120 min (plain or foil face) butt
fire 3.5m 9m 20m 120 120 jointed, incorporating 44509
barrier a 40mm aircavity
between the layers.

N.B. All extensions in drop height must incorporate a minimum 100mm overlap between the sections
and stitched with 1.5mm galvanised wire.

*All stitching must be carried out using 0.9mm annealed and galvanised wire. Continuous wire stitching
(100mm minimum) or separate lengths of wire secured by twisting ends together. Wire must penetrate
through thickness of barrier.

Acoustic performance
The correct use of Fire Barrier within structural cavities and voids will reduce the level of transmitted sound.

Room to room attenuation Rw dB

Typical lay-in grid suspended ceiling 30

Ceiling and 50mm ROCKWOOL Fire Barrier 42

Ceiling and 50mm ROCKWOOL Fire Barrier Foil Faced 44

Ceiling and 2x layers of 50mm ROCKWOOL Fire Barrier Foil Faced 50

Where plasterboard ceilings are used, add 2-3dB to above performances.

Note: Values quoted are approximate.

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Technical information
Standard and approvals

Fire Barrier Systems have been independently tested and assessed to BS 476: Part 22 by UKAS
accredited laboratories.

ROCKWOOL Fire Barrier system achieves a reaction to fire classification of A1 as defined in BS EN 13501:1

They are third party approved for performance and quality by the Loss Prevention Council Certification
board (LPCB) and are listed in their Fire and Security ‘Red Book’ - certificate no. 022c.

The product has been authorised for use in LUL surface and sub-surface premises when installed in
accordance with this data sheet - please refer to the LUL Approved Product Register website
www.LU-apr.co.uk for specific details – LUL ref: 2230.

Product information

One or two sided foil face options available.

Wired mesh is available to both sides if required.

Thickness Length Width

50mm 4000mm 1000mm

60mm 3500mm 1000mm

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CAVITY BARRIERS & CAVITY FIRESTOPS

Installation
½ hour cavity barrier
Figures 4-9 show typical details for Fire barrier applied to a timber truss construction as a half hour cavity
barrier within the roof section, to satisfy the requirements of building Regulation B3 - (4) i.e. 30 minutes
fire integrity and 15 minutes fire insulation.

If the truss is constructed from a minimum timber size of 35 to 49mm thick, both sides of all truss
members/bracing require protection from fire in order to minimise charring and retain strength. Figure 6
shows strips of 50mm Fire Barrier used on the reverse side of the truss (for this purpose). Nail plate fixings
may fail prematurely in fire unless protected (see Figure 9).

The ROCKWOOL
Fire Barrier
Fixing System ROCKWOOL
angle support
incorporates an
angle support and
ROCKWOOL
clamping plate clamping plate
(up to one hour)

For fixing to timber, the ROCKWOOL clamping plate is used, compressing the barrier to the timber, fixed
at 450mm centres using No. 10 woodscrews.

To use the patented ROCKWOOL angle support system, bend tongues out to 90° and impale barrier
onto them. The slotted clamping plate is then fitted by pushing the tongues through the slots, these are
then bent over the face of the clamping plate completing the process.

Figure 4
Fire Barrier traverse to rafters

Allow sufficient material

to pack and stitch Fire
Barrier between rafters
as shown

Tongues at max 450mm

centres

Continuous angle support

secured to underside of
each rafter with no 10
wood screws

RW clamping plate

Figure 5
Half hour protection for timber truss construction 50mm thick or more.
Note: Nail plate protection required - see Figure 6
RWA45
min 200mm
Tiled or slated roof

No. 10 wood screws at

maximum 450mm centres
RW clamping plate

ROCKWOOL 50mm Fire

Barrier tightly butt joined
and stitched (see Fig. 15)
Minimum 50mm thick
timber trussed rafter
No. 10 wood screws at
maximum 450mm centres
Clamping plate

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Figure 6
Half hour protection for timber truss construction 35 to 49mm thick.
RWA45
min 200mm
Tiled or slated roof

35-49mm thick timber

trussed rafter

0.9mm wire stitching

to secure strips to main
barrier stitches typically
100mm long

No. 10 wood screws

(or large washer and
screws) at maximum
450mm centres
50mm Fire Barrier

Figure 7
Head of partition

ROCKWOOL Fire Barrier

RW clamping plate

No.10 wood screws at

max 450mm centres

Head plate

Ceiling board

Figure 8
Barrier fitted transversely to timber joisted ceiling

Tongues fixed at max

300mm centres

Angle support fixed to

ceiling joists

Figure 9
Nail plate protection
25mm thick ROCKWOOL
BeamClad® fixed with
FIREPRO® Glue and
nailed, or 50mm Fire
Barrier secured with
screws and large square
washers. Use 50mm nails
for BeamClad® and 70mm
300
screws for Fire Barrier.

300

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CAVITY BARRIERS & CAVITY FIRESTOPS

For fixing to concrete soffits (Figure 10-12), the pre-punched angle support is fixed using Hilti
DBZ or Ejot ECL 35 hammer set anchors at max. 750mm centres. For fixing to steel purlins, use
Hilti SMD 02Z (5.5 x 70mm) self-tapping screws at maximum 450mm centre.

Figure 10
50mm Fire Barrier fixed to concrete soffit.

Support angle fixed to

soffit at max 750mm
centres

Angle support tangs fixed at

450mm centres
max 450mm

max 450mm

Figure 11
50mm Fire Barrier running across ribbed soffit - Section

RW clamping plate fixed

at 450mm centres

Angle support fixed as

Fig10

Barrier cut and packed

into troughs and wired to
prevent uncoiling

Figure 12
Alternative fixing to flat soffit or perimeter, appropriate to barriers with a shallow drop

50mm Fire Barrier

compressed between
soffit and clamping plate
at max 450mm centres

Hilti DBZ 6/4.5 or Ejot

ECL 35 hammer set
anchor

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60-30 fire barrier

If 30 minutes insulation is required, use 1 layer of 60mm plain or foil-faced fire barrier with 100mm
vertical over lapped joints (Figure 13 & 14). The barrier is otherwise fixed for timber construction as
previously shown on Figures 4-9.

Figure 13

min 100mm

Figure 14

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CAVITY BARRIERS & CAVITY FIRESTOPS

Common details

Extended drops
ROCKWOOL 50mm Fire barrier single and double layers, can be extended from a 3.5m drop to a
maximum 6m drop by fixing an additional 2.5m section, stitched with overlapped joints as per Figure 16.
For additional guidance and drops in excess of 6m, please refer to Figure 31 and associated guidance.

Wire stitching of butt joints in ROCKWOOL Fire Barriers

Adjacent barriers must be closely butt jointed, or overlapped, and through stitched with 0.9mm
galvanised annealed wire (see Figure 15). It is essential that the barrier provides a good seal at its head,
perimeter and at all joints. Where the barrier abuts a profile such as a trapezoidal deck, the material
must be cut to suit and secured to fire stop the gap (see Figure 17). For extended drops, 1.5mm
diameter galvanised and annealed wire is used (see Figure 16).

Figure 15

min 100mm

100mm typical

Figure 16

min 100mm 100mm typical

Figure 17
Fire Barrier cut and
pushed up into profile as
fire stopping

max Angle or clamping plate

max 450mm
450mm fixing Fire Barrier to purlin
with self tapping screws
at 450mm centres (Hilti
SMD 02Z 5.5 x 70mm)

Adjacent Barriers butt

jointed and wired tightly
together as Fig15

Fire Barrier draped over

suspended ceiling and
wired to grid, min 100mm
lap. If not wired, overlap
is min 150mm

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Penetration details
It is regarded as good practice to adequately support or reinforce services penetrating compartment
walls and cavity barriers, to prevent displacement. It is recommended that such supports should be no
greater than 500mm from each face of the Fire Barrier.

To maintain the integrity of the Fire/Cavity Barrier when penetrated by services with a high melting point
(such as steel or copper pipes, beams or trusses) the barrier is first cut locally to accommodate the service
or structural member and then re-stitched as neatly as possible. The penetration is then lightly sleeved
each side of the barrier to a minimum length of 300mm, using the same barrier material. Each sleeve
should be securely stitched to the main barrier to produce a tight seal and prevent future detachment
(see Figures 18 and 19). Where access is only available from one side, the double seal solution may be
replaced by a single ‘collar’ detail - please contact our Technical Solutions Team for further advice.

If the penetrating service is manufactured from low melting point materials such as plastic or aluminium,
then sleeving should be extended to at least 1000mm either side of the barrier.

This guidance applies to services such as pipes, sheathed cables and conduits, including those carried on
steel trays.

For protected steel ductwork with a tested fire resistance performance (stability, integrity and insulation)
at least the same as the Fire Barrier, 300mm sleeves should be applied either side of the main barrier, as
for high melting point services above.

For information on achieving fire protection to steel ductwork, please refer to the ROCKWOOL Fire Duct
System data sheet.

For non-fire protected ductwork, or that with a fire resistance performance less than the barrier, two
sleeves should be applied to each side of the barrier, an inner sleeve of 1000mm and an outer sleeve of
300mm. All sleeves should be stitched to the main barrier.

The duct should also include an independently supported fire damper, located in the line of the
main barrier. Reference should also be made to Approved Document B of England & Wales Building
Regulations - Volume 1, Requirement B3, Section 7 and Volume 2, Requirements B3, Section 10.

Figure 18

Sleeves wire stitched

1m min through main barrier

300mm min
Fire barrier material
backing

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CAVITY BARRIERS & CAVITY FIRESTOPS

Figure 19

Sleeves to be stitched to
main barrier

Off-cuts of Fire Barrier

to be packed tightly into
purlin void

1 hour fire barrier

The unique, patented ROCKWOOL support angle and clamping plate is used to fasten two 50mm Fire
Barrier curtains with one support angle without the need for a cavity.

The ROCKWOOL support angle has tongues that are pushed out from opposite sides at 300mm max.
centres. The ROCKWOOL Fire Barriers are then impaled on the tongues on both sides and clamped
using the ROCKWOOL clamping plates. The tongues are finally bent over the clamping plates,
completing the system.

The system uses 50mm Fire Barrier in a double layer with joints staggered.

Note: Wire reinforced sides should be placed outwards.

Figure 20

Concrete soffit

Fire Barrier support angle

Hilti DBZ 6/4.5 or Ejot

ECL 35 hammer set
anchor at max 750mm
centres

Two layers of 50mm

Fire Barrier with joints
staggered

Figure 21

Clamping plate

Screw system at max

450mm centres

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Figure 22

Clamping plate

Hilti hammer screws at

max. 450mm centres

Figure 23
Concrete soffit

Support angle fixed to

soffit at max 750mm
centres
300mm
300mm max
max Clamping plate fixed at
300mm centres

Two layers of 50mm

Rockwool Fire Barrier,
vertical joints staggered
and stitched and clamped
to head of wall

Suspended ceiling

Fire-resisting wall

Fixing To timber structure (1 hour)

When a 1 hour Fire Barrier is supported on structural timber (for example a trussed
rafter), and the thickness of timber is 35-49mm, one layer of 60mm ROCKWOOL
Fire Barrier must be placed on each side of the timber (see Figure 24). Where
timber thickness is 50mm or greater, 2 layers of 50mm Fire Barrier are sufficient.

Figure 24
Fill space between battens
with 300mm wide RWA45

RW clamping plate
No.10 wood screws at
maximum 450mm centres
35mm thick timber
trussed rafter
60mm ROCKWOOL Fire
Barrier tightly butt joined
and stitched (see Fig.15)
1 hour fire rated ceiling
Clamping plate
No.10 wood screws at
maximum 450mm centres

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CAVITY BARRIERS & CAVITY FIRESTOPS

1.5 & 2 hour fire barriers

1.5 hour fire barrier

The ROCKWOOL 1.5 hour Fire Barrier system uses 2 layers of 50mm Fire Barrier
with staggered joints fixed as Figures 25-27.

Note: Wire reinforced faces should be placed outwards.

Figure 25
Concrete soffit
2mm tested angle fixed
300mm
max to soffit at max 750mm
150mm
300mm max centres (see Fig. 26).
max

Clamped at max 300mm

centres with M6 bolts
and nuts

Two layers of 50mm

ROCKWOOL Fire Barrier,
vertical joints staggered
and stitched

Suspended ceiling

Fire-resisting wall

Figure 26

Concrete soffit

2mm tested angle fixed

to soffit at max 750mm
centres
M8 expanding bolt
anchors at max. 750mm
centres

M6 bolts and nuts

staggered each side

2mm tested punched

strap
Two layers of 50mm Fire
Barrier with vertical joints
staggered

Figure 27

2mm tested punched

strap

Hilti HUS universal Screw

System max. 300mm
centres

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2 hour fire barrier

The ROCKWOOL 2-hour Fire Barrier (see Figures 28-30) consists of two layers of 60mm (plain or foil-
faced), wire stitched Fire Barrier with staggered vertical joints, separated by a nominal 40mm air space.
The base or perimeter to which the barrier is fixed must be capable of remaining in place for 2 hours.

Figure 28
Concrete soffit
2mm tested angle fixed
to soffit at max 750mm
centres (see Fig. 29).
2mm tested strap
clamped at max 300mm
centres with M6 bolts
and nuts
Two layers of foil-faced,
wire reinforced 60mm Fire
Barrier, with foil outwards,
vertical joins, staggered and
stitched. 40mm air space
between the two layers

Suspended ceiling
Fire-resisting wall

Figure 29

2mm tested angle fixed

to soffit at max 750mm
centres

M8 expanding bolt
anchors at max. 750mm
centres
2mm punched strap

M6 bolts and nuts

Figure 30

Two layers of foil-

faced Fire Barrier

2mm punched
strap and universal
Screw System max.
300mm centres

2mm punched
strap

Ceiling

Angle and strap for 1.5% and 2 hour fire barriers

The following specification for slotted angles and straps is suitable for supporting ROCKWOOL Fire
Barriers for 1.5 and 2 hours when tested to BS 476: Part 22. Slotted angles (62 x 41 x 2mm) and straps (38
x 2mm) manufactured from mild steel conforming to BS 1449: Part 1.1: 1991 and cold reduced to provide
a minimum of 0.2% proof stress of 417 Mpa (27 tons/ in2) and conforming to BS 4345: 1968 (1986) -
Specification for slotted angles (inc. flat strap).

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CAVITY BARRIERS & CAVITY FIRESTOPS

Other installation information
General design considerations
A cavity fire barrier must be designed to restrict the passage of both hot smoke and flames for the
minimum specified period, as listed in Approved Document B in support of the Building Regulations.
In addition, it must be fixed in such a way that:

• It will remain effective in the event of structural movement

• There are no gaps where it abuts other elements of construction

• It complies with the requirements of Approved Document B of the Building Regulations

Extended drops
For periods of up to 60 minutes, ROCKWOOL Fire Barriers
can be used for extended void heights between 3.5 and 6m
without the need for a supported frame - see Figure 16 for
joining barriers with overlap. For periods of up to 90 minutes,
this drop height can be increased to 10.5m (9m for 120 minutes),
by the use of a simple frame system constructed from slotted
angles and straps (see Figure 31).

Further details are available from ROCKWOOL Technical

Solutions Team.

Fire barriers and dampers

Where ROCKWOOL Fire Barriers are installed in conjunction
with fire dampers, the dampers must be supported
independently of the fire barrier. HVCA or ASFP publications
may be helpful. Figure 31

Access through barriers

Where regular access is required through the barriers for maintenance
purposes etc, this should be achieved by the inclusion of an independently
supported fire rated door set and frame. The Fire Barriers should be
clamped to the door frame with the RW clamping plate and appropriate
fixings at 450mm centres.

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Ancillaries
ROCKWOOL ancillaries
ROCKWOOL Fire Barrier support angle and clamping plate are specially manufactured for ROCKWOOL.

Clamping plate:
3m x 40mm, 10 lengths per pack

Fire barrier support angles:

3m x 34mm x 75mm, 10 lengths per pack

Proprietary fixings
All steel hammer set expansion anchors for soffit fixings are available from Hilti, or Ejot. For perimeter
fixings to concrete or masonry, use Hilti HUS Universal Screw system. For fixings to timber, use standard
No. 10 steel wood screws 100mm long.

Durability
For durability, we recommend that the finish should be capable of withstanding at least 200 hours salt
spray and 400 hours humidity corrosion resistance testing to BS 3990: Part F. Slotted angles and straps
conforming to this specification are available from the following suppliers: JB Products Tel: 01384 240234
Link 51 Tel: 01952 682251 Romstor Tel: 01442 242261

If other hardware is used to support the barriers, we recommend that the respective specifier, supplier
or installer should be certain that the chosen fixing system has been both tested and approved, for the
required period of fire resistance and drop height.

Site advisory service

ROCKWOOL provides a site advisory service by engineers, solely employed to assist with advice when
installing ROCKWOOL materials on site. The service is intended for site guidance, but is not intended to
be an inspection facility unless agreed under a separately financed contract agreement.

For Approval of installed barriers, the installer or building owner will be referred to a suitably accredited
and experienced fire assessor or fire safety engineering organisation.

Packaging of fire barrier

Shrink wrapped in polyethylene

Handling
ROCKWOOL Fire Barriers are easy to handle. It is easy to cut to any shape. The product should be stored
indoors or under a weatherproof covering.

Maintenance
Once installed, ROCKWOOL Fire Barriers should need no maintenance. Fire Barriers should be inspected
to ensure that they have not been disturbed during maintenance of areas and/or as part of a regular
maintenance program.

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Specification clauses
ROCKWOOL Fire Barrier System is associated with the following NBS clauses:

• K10: Gypsum board dry linings/partitions/ceilings

• 530 – Cavity fire barriers within partitions/wall linings

• 545 – Cavity fire barriers within suspended ceilings

• K40: Demountable suspended ceilings

• 287 – cavity barriers

• 425 – Installing cavity barriers

• 431 – Installing sound barriers

• P10: Sundry insulation/proofing work

• 410 – Flexible cavity barriers

• 430 – Wired mineral wool small cavity barriers

• 440 – Fire protection

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FIRE BARRIER SLAB

Advantages
• Simple, butt-jointed and friction fit application

• No fixings, fasteners or angles required

• Suitable for closing voids of up to 1m in height and

20m in length

• Provides airborne sound reduction

• Service penetration data available

• Fire resistance of up to 4 hours integrity

• LUL approved in combination with ROCKWOOL

LUL Intumescent Sealant

Description Applications
ROCKWOOL Fire Barrier Slab comprises • Head of wall
a high density stone wool core which
• Concealed voids
is foil-faced on both sides. Fire Barrier
slab has been developed to prevent • Service penetrations
the spread of flames, inhibit heat and
smoke through concealed spaces in
buildings and improve sound reduction.

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Performance
Fire performance
Achieves 240min integrity; 60 min insulation without service penetrations. Where service penetrations are
present Fire Barrier slab can achieve 90min integrity; 60min insulation dependent on service penetration
type. For further information of specific service penetration details please contact ROCKWOOL Technical
Support.

Acoustic performance
ROCKWOOL Fire Barrier Slab has been tested in accordance with BS EN ISO 10140-2:2010 achieving
Rw 23dB. Test Report N° C/23667/T01.

Technical Information
Standards and approvals
Fire Barrier Slab has been independently tested and assessed to BS 476: Part 20 and Part 22 by
accredited laboratories.

ROCKWOOL Fire Barrier system achieves a reaction to fire classification of A1 as defined in BS EN 13501:1

They are third party approved for performance and quality by the Loss Prevention Council Certification
board (LPCB) and are listed in their Fire and Security ‘Red Book’ - certificate no. 022c/02.

The product has been authorised for use in LUL surface and sub-surface premises when installed in
accordance with this data sheet - please refer to the LUL Approved Product Register website
www.LU-apr.co.uk for specific details – LUL ref: 2231.

Product information
Thickness Length Width
100mm 1000mm 666mm

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Installation
1. Fire Barrier Slab should be cut to the appropriate height and friction fitted within the opening.
2. ROCKWOOL Acoustic Intumescent Sealant or ROCKWOOL LUL Intumescent Sealant should then be
applied to both the butt joints and perimeter of the barrier seal.
Service penetrations
ROCKWOOL Fire Barrier Slab can be penetrated by steel pipes of ≤ 33 mm external diameters and steel
cable trays of ≤ 305mm x 50mm.
Penetrating services must be independently supported by a maximum of 150mm from the face of the
slabs.
Handling
ROCKWOOL Fire Barrier slab is easy to handle. It is easy to cut to any shape. The product should be
stored indoors or under a weatherproof covering.
Maintenance
Once installed ROCKWOOL Fire Barrier Slab should need no maintenance. Fire Barrier Slab should be
inspected to ensure that they have not been disturbed during maintenance of areas and/or as part of a
regular maintenance program.

Specification clauses
• ROCKWOOL Fire Barrier Slab is associated with the following NBS clauses:
• K10: Gypsum board dry linings/partitions/ceilings
• 530 – Cavity fire barriers within partitions/wall linings
• 545 – Cavity fire barriers within suspended ceilings
• K40: Demountable suspended ceilings
• 287 – Cavity Barriers
• 425 – Installing cavity barriers
• 431 – Installing sound barriers
• P10: Sundry insulation/proofing work
• 410 – Flexible cavity barriers
• 430 – Wired mineral wool small cavity barriers
• 440 – Fire protection

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CAVITY BARRIERS & CAVITY FIRESTOPS

TCB & PWCB
CAVITY BARRIERS

Advantages
• Easy to install

• Fire resistance up to 60 minutes (EI)

• Reduce acoustic flanking transmission

• Improves air leakage & heat loss

• Unaffected by building movement

• Suitable for vertical and horizontal applications

• Site durable & weather protected

Description Applications
ROCKWOOL TCB & PWCB cavity ROCKWOOL TCB & PWCB Cavity barriers
barriers are manufactured from non- can be used in both vertical and horizontal
combustible stone wool, encapsulated applications, providing an effective fire,
within a resilient polythene sleeve which acoustic and thermal barrier within external
eliminates the need for weather wall cavities and separating party walls.
protection during installation. The
sleeves are also colour-coded to All ROCKWOOL Cavity barriers are 1200mm
differentiate between the two products, long and are designed to be compression
TCB’s being red and PWCB’s white. fitted within the cavity (min 10mm-15mm
compression). The barriers do not rely on
the polythene flanges to hold them in place
in the event of a fire. It is essential that the
correct cavity barrier size is specified to suit
the as-built cavity width. TCB & PWCB
cavity barriers are available in a range of
thicknesses to suit cavity widths (refer to
the tables at the end of the data sheet for
more information).

Figure 1 Figure 2
TCB PWCB

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Performance
Fire performance
The use of ROCKWOOL Cavity Barriers satisfies the requirements of:
• Approved Document B (Domestic) B3 - Section 6: Concealed spaces (Cavities)
• Approved Document B (Non-domestic) B3 - Section 9: Concealed spaces
(Cavities)
• Scottish Technical Handbook Section 2 - Fire Section 2.4: Cavities
• NI Technical Booklet E - Section 3: Provision of cavity barriers.

Fire performance – BS 476: Part 20: 1987 (TCB & PWCB)

Table 1
PWCB

Cavity width (mm) PWCB size (mm) Fire resistance per construction
50-55 200x65 60min integrity
60min insulation
75-80 200x90 60min integrity
60min insulation
90-100 200x110 60min integrity
60min insulation
101-110 200x120 60min integrity
60min insulation
111-120 200x130 60min integrity
60min insulation
121-130 200x140 60min integrity
60min insulation
131-140 200x150 60min integrity
60min insulation
141-150 200x160 60min integrity
60min insulation

Table 2
TCB
Fire resistance per construction
Cavity width (mm) TCB size (mm) Timber to timber Masonry to masonry
50 - 55 65x65 30min integrity 60min integrity
30min insulation 30min insulation
56 - 65 75x75 60min integrity 60min integrity
30min insulation 30min insulation
75 - 80 90x90 60min integrity 60min integrity
30min insulation 60min insulation
90 - 100 110x110 60min integrity 60min integrity
60min insulation 60min insulation
101 - 110 120x120 60min integrity 60min integrity
60min insulation 60min insulation
111 - 120 130x130 60min integrity 60min integrity
60min insulation 60min insulation
121 - 130 140x140 60min integrity 60min integrity
60min insulation 60min insulation
131 - 140 150x150 60min integrity 60min integrity
60min insulation 60min insulation
141 - 150 160x160 60min integrity 60min integrity
60min insulation 60min insulation

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CAVITY BARRIERS & CAVITY FIRESTOPS

Fire performance - BS EN 1366-4: 2006 +A1 2010 (TCB only)

Fire performance

Table 3
Wall
Masonry to
Cavity size TCB range Masonry to Masonry to Masonry to ROCKWOOL
(mm) (mm) masonry (mins) steel (mins) timber (mins) (100Kg/m3) (mins)

50-285 Min: 65x65 Integrity: 60 Integrity: 180 Integrity: 60 Integrity: 120

Max: 300x150 Insulation: 30 Insulation: 30 Insulation: 60 Insulation: 20

Table 4
Floor
Cavity size TCB range Masonry to Masonry to Masonry to
(mm) (mm) masonry (mins) steel (mins) timber (mins)
50-285 Min: 65x65 Integrity: 120 Integrity: 120 Integrity: 60
Max: 300x150 Insulation: 90 Insulation: 20 Insulation: 20

PWCB cavity barrier - All ROCKWOOL PWCB’s are 200mm wide, and are specifically designed for use
at party wall/external wall cavity junctions. PWCB’s also achieve the requirements for fire safety, acoustic
flanking and thermal bypass in one single product.
Thermal: party wall thermal bypass - PWCB meets the requirements for an effective party wall perimeter
edge seal, by restricting air flow around the exposed edges of party wall cavities.
Fire: acts as an effective cavity barrier - PWCB is non-combustible and exceeds minimum fire resistance
requirements for cavity barriers as set out within the Building Regulations.
Acoustic - ROCKWOOL PWCB provides an excellent acoustic absorber by reducing flanking transmission
between adjoining properties, (as required by Approved Document E and Robust details).
If installed correctly, ROCKWOOL PWCB will help minimise the thermal party wall bypass effect, by
restricting air leakage and heat loss between the party wall cavity and the external cavity.
Thermal bypass effect - Approved Documents L1A & L2 A of England and Wales’s Building Regulations
and Section 6 of Scotland’s Building standards (domestic), have recognised that considerable heat loss
can occur where party wall cavities interface with external cavity walls. A key feature of a SAP calculation
is that Building Regulations now assign a U-value of 0.5 W/m2K to be taken for a separating party wall
cavity unless specific action is taken to improve its performance.
Ways to limit heat Loss - Perimeter edge sealing only: Thermal regulations allow a U-value of 0.20W/m2K
to be claimed when effective perimeter edge sealing is used around all exposed edges of the party wall.
Perimeter edge sealing plus fully filling the party wall cavity - A U-value of zero can be claimed if the
party wall cavity is fully filled with appropriate mineral wool insulation, and effective perimeter edge
sealing is provided around all exposed edges.

Acoustic performance
ROCKWOOL TCB & PWCB Cavity Barriers comply with the generic description for cavity closers to
prevent flanking noise transmission, along concealed cavities in both external and separating walls.

Table 5

Cavity type in party wall U-value claim for SAP

Unfilled cavity with no effective edge sealing 0.5 W/m2K
Unfilled cavity with effective edge sealing only 0.20 W/m2K
Fully filled cavity and effective edge sealing 0.00 W/m2K

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Technical Information
Standards and approvals
TCB & PWCB Cavity Barriers have been tested and assessed BS476: Part 20: 1987 and can achieve a fire
resistance rating of up to 60 minutes (EI).
TCB Cavity Barriers have been tested to BS EN 1366-4: 2006 +A1 2010 using the general principles of BS
EN 1363-1:2012 achieving a fire resistance rating of up to 60 minutes (EI).
TCB & PWCB Cavity Barriers are manufactured using non-combustible stone wool which is classified A1
in accordance with BS EN 13501-1: 2007 +A1 2009.
TCB Cavity Barriers are third party approved for performance and quality by the Loss Prevention Council
Certification Board (LPCB) and are listed in their Fire and Security ‘Red Book’ – certificate no: 022b (3).
Product information

Property Description
Length 1200mm
Width TCB – Up to 150mm
PWCB – 200mm
Thickness TCB – Up to 300mm
PWCB – Up to 160mm
Cavity sizes TCB – Up to 285mm
PWCB – Up to 150mm
Reaction to fire Euroclass A1 (ROCKWOOL Core)
Fire resistance 60 minutes (EI)

Installation
All joints between adjacent cavity barriers and intersections should be closely butted to ensure that a
continuous fire seal is maintained.
In vertical applications, both flanges of the Cavity Barrier can be fixed to the inner leaf at 150mm centres,
using staples or clout nails prior to compression fitting by outer cavity wall.
In horizontal applications, only the top flange of the polythene sleeve should be fixed.
Fully filled cavities in external walls
Where the external wall cavity is fully filled external cavity barriers are generally not required in the outer
wall.
Partially filled cavities in external walls
Where partial fill insulation is used in the external wall, the insulation should be cut back to permit the
cavity barrier to be compression fitted between the inner and outer leaves. The head of the cavity wall
should be closed at eaves level with the ROCKWOOL TCB Cavity Barrier.

Specification clauses
ROCKWOOL TCB & PWCB Cavity Barriers are associated with the following NBS clauses:
F30 Accessories/sundry items for brick/block/stone walling
• 180 Cavity Closers
K10 Gypsum board dry linings/partitions/ceilings
• 530 Cavity barriers within partitions/wall linings
P10 Sundry insulation/proofing work
• 420 Sleeved mineral wool small cavity barriers

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CAVITY BARRIERS & CAVITY FIRESTOPS

FIREPRO®
SP FIRESTOP SYSTEMS

Advantages
• Easy to install, dry fit system

• Can accommodate limited movement

• Tested to provide up to 2 hours of fire resistance

• Resists the passage of smoke – aluminium foil faced

on both sides

• Suitable for cavity widths up to *1000mm

*Please contact ROCKWOOL Technical Solutions for fire resistance ratings in

voids over 600mm wide.

Description Applications
ROCKWOOL SP Firestop System SP Firestop System may be installed
comprises of both the SP Firestop Slab horizontally or vertically and is suitable
and SP Firestop fixing brackets. The for cavity widths between 50mm and
SP Firestop Slab is a medium density 600mm. SP Firestop can also be used
stone wool slab which incorporates a horizontally in cavity widths up to
foil facing to both sides. The foil facing 1000mm for further information please
includes cutting lines to support accurate contact ROCKWOOL Technical Solutions.
installation.
SP Firestop System is suitable for:
• Masonry constructions
• Curtain walling systems
• Large cavity voids
• Rainscreen facades (vertical use only)
SP Firestop System is not suitable for use
as a horizontal fire barrier in ventilated
façade systems. For these applications
consider using the ROCKWOOL SP
Firestop VRB

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Performance
Standards and approvals
SP Firestop System has been tested and assessed to BS 476: Part 20. It has also been tested to BS EN 1366-
4: 2006 and classified to BS EN 13501-2.

Achieves Euroclass A1 in accordance with BS EN 13501-1.

SP Firestop System is third party approved with LPCB – certificate no. 022b.

This product has been authorised for use in LUL surface and sub-surface premises when installed in
accordance with this datasheet. Please refer to the LUL Approved Product Register at www.LU-apr.co.uk for
specific details. LUL Ref: 2244.

Fire performance
The SP Firestop System can achieve a fire resistance rating of up to 2 hours in voids of up to 600mm.

Product Wall Floor Cavity (mm) Test standard

SP60 (standard) EI60 EI60 400 BS 476 Part 20
SP120 (standard) EI120 EI120 400 BS 476 Part 20
Fire performance with +/- 3% Movement
SP60 (standard) EI60 300 BS EN 1366-4
SP120 (standard) EI120 300 BS EN 1366-4

SP Plus (with XL bracket) EI120 EI120 600 BS EN 1366-4

SP Plus (with XL bracket) EI60 1000 BS EN 1366-4

Movement testing
SP Firestop Slab has been tested with movement applied in accordance with the provisions set out in Annex
B of BS EN 1366-4: 2006. SP60 and SP120 can accommodate +/- 3% movement in cavities up to 300mm

Masonry support bracket penetration

The SP Firestop System has been tested in conjunction with the AnconOptima Masonry Support System
where the Masonry Support System penetrated the SP 60 Firestop Slab.

For further information on the use of masonry support brackets with the SP Firestop System please contact
ROCKWOOL Technical Solutions.

Bracket
Product penetration Fire resistance Cavity (mm) Test standard
SP60 Firestop Slab 50% EI60 400 BS EN 1366-4
SP60 Firestop Slab 100% EI60 400 BS EN 1366-4

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CAVITY BARRIERS & CAVITY FIRESTOPS

Acoustic performance
ROCKWOOL products have excellent acoustic properties and can significantly reduce the levels of airborne
sound transmission through wall and floor cavities. For further information please contact ROCKWOOL
Technical Support.

Product information

Property Description
Length 1000mm
Width 650mm
Thickness 75 & 90mm
Fire resistance Up to 2 hours

Handling
ROCKWOOL SP Firestop Slabs are light and easy to handle. They are supplied in compression-wrapped
polyethylene, which will provide short-term protection.
For long-term storage they must be protected by a waterproof covering.

Installation
ROCKWOOL SP Firestop Slabs are designed for cutting on site with a sharp knife or saw and a straight edge.
The cavity to be fire stopped should be measured and the ROCKWOOL SP Firestop Slab cut to suit this
dimension, using one piece only per gap width - see Figures 4 and 5.

For easy compression fitting and to accommodate the fixing pattern, cutting should be along the 1000mm
length as indicated in figure 1.

The SP Fixing Brackets are then re-profiled by hand and cut as necessary to allow at least 75% penetration of
the fire stop material – see Figures 2 and 3.

They should be placed as shown in the diagrams, or fixed by other suitable mechanical means.

Re-profile the bracket by

hand to form a Z shape

Break off tab at serration

prior to installation
1000mm
Figure 2
SP Firestop Fixing Bracket
650mm

SP Firestop Slab - direction of cut

to produce 1000mm long Firestop Secure bracket with
metal fixings suitable for
strips to suit cavity width W masonry

Figure 1
Cutting method for SP Firestop Slab min. 75% penetration

Figure 3
Sectional view of Firestop Slab and Bracket

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Fixing within cladding & curtain walling systems

1. Cut the ROCKWOOL SP Firestop Slab to suit the *cavity size, allowing for additional compression of up
to 10mm.

2. The ROCKWOOL SP60 or SP120 Firestop Slab is impaled onto the SP Fixing Brackets at the rate of
2 per 1000mm length, fixed at 500mm ±10mm centres as shown in Figure 4. The SP Fixing Brackets
should be placed 250mm ±10mm in from each end of the ROCKWOOL SP Firestop Slab.

3. The product should then be fitted securely into the void and tightly butted to the adjacent
ROCKWOOL SP Firestop Slab.

4. Once the ROCKWOOL SP Firestop Slab has been accurately fitted, the SP Fixing Brackets must then
be fitted to the edge of the concrete floor slab with metal fixings suitable for masonry.

Fixing into masonry wall cavities

5. Cut the ROCKWOOL SP Firestop Slab to suit the *cavity size ensuring a tight fit.

6. After suitably re-profiling the SP Fixing Brackets they can be built into the bed joints of the internal leaf
at 500mm ±10mm centres. Alternatively the SP Fixing Brackets may be re-profiled by hand into an ‘L’
shape and mechanically fixed to the face of the inner leaf.

7. The ROCKWOOL SP Firestop Slab is then impaled onto the SP Fixing Bracket after the next lift of inner
leaf masonry.

8. Work on both leaves can then be continued and must include either a vertical damp proof course
(vertical installation) or a cavity tray (horizontal installation) installed over the SP Firestop Slab as shown
in Figure 5.
*For cavity widths of 250mm or more, joints between adjacent lengths of SP Firestop Slab should be sealed on the top surface with
aluminium foil tape.

Vertical section Plan view

Curtain wall

Y
500mm

Concrete floor slab

Dimension Y is 75mm (SP 60)

or 90mm (SP 120)

Figure 4
ROCKWOOL SP Firestop Slab between floor and curtain wall

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CAVITY BARRIERS & CAVITY FIRESTOPS

Vertical installation
Horizontal installation

Cavity tray
ROCKWOOL® SP
Fixing Brackets ROCKWOOL® SP
Fixing Brackets

Vertical dpc

Figure 5
ROCKWOOL SP Firestop Slab between masonry leaves

Ancilliaries
SP Firestop Fixing Brackets

Bracket type Cavity size (up to mm) Pieces / pack

SP/S 100 50
SP/L 400 50
SP/XL 600 50

ROCKWOOL SP Fixing Brackets are supplied in three standard sizes; SP/S (small), SP/L (large) and *SP/XL
for cavity widths up to 600mm. The brackets are supplied in cardboard boxes of 50 pieces, flat packed and
designed to be easily re-profiled by hand on site.

* SP/XL brackets are designed for use with SP Firestop Plus Slab for 2 hours fire resistance in cavities up to 600mm.

Brackets are supplied in cardboard boxes, flat packed, and are designed to be easily re-profiled by hand on site.
The SP Fixing Brackets should be cut on site as necessary to allow at least 75% penetration of the Firestop.
*In order to comply with the fire test certification, only ROCKWOOL SP Fixing Brackets must be used to install the product.

Specification clauses
The SP Firestop System is associated with the following NBS Clauses:
F30 Accessories/sundry items for brick/block stone walling
• 180 Cavity Closers
P10 Sundry insulation/proofing work
• 432 cavity Barriers
P12 Fire stopping systems
• 360 Mineral Wool Rigid Batts

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FIRE STOPPING
Section 3 – Linear joint seals

Sealing construction joints between fire resistance elements within a compartment is vital. Products and
systems used in this application should achieve the same level of fire resistance as the compartment
elements, whilst also maintaining integrity during the expansion and contraction (movement) of
construction materials.
ROCKWOOL provide a range of tested products that are designed for sealing linear joints between
different construction materials, that can also accommodate movement where required. Within our
product range there are products suitable for:

• Fire stopping junctions between compartments walls and floors or roof decks

• Fire stopping expansion joints within the construction

• Sealing narrow joints between different substrates

FIREPRO® FIREPRO® Linear

Expansion & Trapezoidal
Joint Seals Firestops

FIREPRO® Fire Rated Silicone

Sealant & FIREPRO® Acoustic
Intumescent Sealant

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Core products

LINEAR JOINT SEALS

• Linear & Trapezoidal Firestops • Intumescent Expansion Joint Seals

• Acoustic Intumescent Sealant & Fire Resistant Silicone Sealant

Useful documents and standards

• ASFP Technical Guidance Document – TGD 17: Code of practice for the installation
and inspection of fire stopping systems in buildings

• ASFP Red Book: Fire stopping and penetration seals for the construction industry

• ASFP: Ensuring best practice for passive fire protection in buildings

• ASFP: On-site guide to installing fire stopping

• BS 476-20: Fire test on building materials and structures. Method for determination of
the fire resistance of elements of construction

• BS EN 1366-4: Fire resistance test for service installations. Linear joint seals

• BS EN 1363-1: Fire resistance tests. General Requirements

• BS EN 13501-2: Fire classification of construction products and building elements.

Classification using test data from resistance to fire tests, excluding ventilation services.

ASFP ( Association for Specialist Fire Protection) guidance documents can be sourced at www.asfp.org.uk

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FIREPRO®
SOFTSEAL SYSTEM

Advantages
• Suitable for penetration and linear joints

• Acoustically absorbent

• CE Marked

• Easy to handle and install

Description
• Both vertical and horizontal joint applications
Part of the ROCKWOOL FIREPRO®
range, FIREPRO® SoftSeal System • Tested for durability to current EU guidelines
incorporates a product specifically
designed to accommodate movement • Supplied pre-coated
within buildings in linear joint seals and
penetration seals.

Applications
The FIREPRO® SoftSeal System has been specifically developed for two key
applications areas:

Penetration seals Linear joint seals

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Penetration seals
Description
As part of the comprehensive ROCKWOOL FIREPRO® range of fire protection products, FIREPRO® SoftSeal
System incorporates a product specifically designed to apply to penetration seals within buildings, where the
design needs to accommodate movement in the services.
The FIREPRO® SoftSeal System can be installed into apertures within masonry or drywall partitions as a
standalone seal for openings up to 1000mm x 1000mm or as part of a larger ROCKWOOL Ablative Coated
Batt seal (2 layers) to accommodate movement of services. *

LINEAR JOINT SEALS

A FIREPRO® SoftSeal Coated Strip comprises a low-density stone wool SoftSeal Lamella Strip, pre-coated
with SoftSeal Flexible Coating.
The FIREPRO® SoftSeal Coated Strip is supplied in strips 1200mm x 200mm x 100mm.
The FIREPRO® SoftSeal flexible Coating is also available in 5L, 10L and 20L tubs to enable site repairs to
FIREPRO® SoftSeal Coated Strips and FIREPRO® SoftSeal Linear Joint Seals, that may have been damaged
during installation.
To complement the FIREPRO® SoftSeal Coated Strip, ROCKWOOL also supplies FIREPRO® SoftSeal High
Expansion Intumescent Sealant (310ml) and FIREPRO® SoftSeal Flexible Acoustic Intumescent Sealant
(310ml).
FIREPRO® SoftSeal Coated Strip is intended to reinstate the fire resistance, acoustic and air seal
performances of concrete floors, masonry walls and dry wall systems when voids have been created for the
passage of services. This includes pipes made of steel, cast iron, copper, polypropylene (PP), high density
polythene (HDPE), PVC and ABS along with all sheathed cables up to 80mm and supported cable bundles
up to 100mm.
*Higher levels of service movement may be accommodated by installing the product under higher compression rates, please contact
ROCKWOOL Technical Solutions for guidance.

Performance
Fire performance
ROCKWOOL FIREPRO® SoftSeal Coated Strip has been tested to the dedicated fire resistance standard for
penetration seals BS EN1366-3.
Table 1
Fire performance - Linear joint seals
Max. Seal Width (mm) Min. Seal Depth (mm) Integrity (mins) Insulation (mins)
350 100 120 120
375 100 120 120
200 100 240 180
150 100 240 180

The fire performances quoted in table 1 are subject to varying application techniques and movement levels. For further information please
contact ROCKWOOL Technical Support
Standard details, showing the full scope of fire performance, are available from the ROCKWOOL Technical
Solutions Team on 01656 862621.
FIREPRO® SoftSeal Coated Strip fire resistance tests were conducted using FIREPRO® SoftSeal Flexible
Acoustic Intumescent Sealant and/or FIREPRO® SoftSeal High Expansion Intumescent Sealant.
For vertical applications the FIREPRO® SoftSeal Coated Strips are coated on both sides.
Movement
As part of the testing to BS EN 1366-4, FIREPRO® SoftSeal was assessed for its movement capabilities, prior
to conducting the fire test. The product was tested to accommodate movement (expansion and contraction)
of +/-15%*.
*See ROCKWOOL standard details for specific Ablative Coated Batt sizes.

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Acoustic performance
Tested to EN 10140 with the following results:

• Rw 30 dB: When installed with 100mm thick SoftSeal Batt

• Dn,e,w 40 dB: When installed with 100mm thick SoftSeal Batt

Water permeability
Tested to EN 1027 - No leakage observed up to 300Pa.
Air permeability

• Tested to EN 1026 up to 600Pa.

• Leakage at 50Pa - 0.1/1.4 m³/m²/h.

Technical information

Standards and approvals

FIREPRO® SoftSeal has been tested and assessed to BS EN1366-3 2009 and classified to EN 13501-2.
FIREPRO® SoftSeal Coated Strip System has been CE marked against ETAG026-2.

Product information
Property Description
Length 1200mm
Width 200mm
Thickness 100mm
Fire resistance Up to 2 hours
Coating 2 sides
Density 80kg/m³
Movement +/- 15%

Installation

1. Measure the height of the aperture to be sealed.

2. Cut the FIREPRO® SoftSeal Coated Strips 15% bigger than the height of the void to be filled, so when
installed they are under compression.

3. Ensure substrate is clean and free of dust and debris.

4. Apply a bead of FIREPRO® SoftSeal Acoustic Intumescent Sealant around the internal edges of the
aperture.

5. Install the FIREPRO® SoftSeal Coated Strips horizontally, so that the lamellas are running horizontally.

6. Apply a bead of FIREPRO® SoftSeal Acoustic Intumescent Sealant to butt joints between different
sections of SoftSeal Coated Strip and around services.

7. FIREPRO® SoftSeal High Expansion Intumescent Sealant shall be used around plastic pipes in
accordance with ROCKWOOL standard details.

8. Apply FIREPRO® SoftSeal Flexible Coating to the face of all joints between SoftSeal Coated Strip and
substrate/Ablative Coated Batt.

Note: Ensure adequate space above and below services to accommodate the FIREPRO® SoftSeal product,
for the movement levels required.

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Linear joint seals

Description
As part of the comprehensive FIREPRO® range of fire protection products, ROCKWOOL FIREPRO® SoftSeal
System incorporates a product specifically designed to form a linear joint seal within buildings, where the
design needs to accommodate movement in the joint.

It may be installed horizontally or vertically and is suitable for linear joint widths up to 300mm*. FIREPRO®

LINEAR JOINT SEALS

SoftSeal Linear Joint Seal can also be used as a ‘head-of-wall’ barrier to extend the fire resistance and
acoustic performances of masonry walls that finish at suspended ceiling height, up to the concrete soffit
above. FIREPRO® SoftSeal Linear Joint Seal can be used in conjunction with ROCKWOOL Ablative Coated
Batt for head-of-wall applications.

A FIREPRO® SoftSeal Linear Joint seal comprises a low-density stone wool FIREPRO® SoftSeal batt, pre-
coated with FIREPRO® SoftSeal Flexible Coating. Depending on the application, FIREPRO® SoftSeal Linear
Joint Seal can be supplied on either one or both sides. (Single Sided for Horizontal Applications. Double
sided for Vertical Applications).

The FIREPRO® SoftSeal Flexible Coating is also available in 5L, 10L and 20L tubs to enable site repairs to
FIREPRO® SoftSeal Coated Strips and FIREPRO® SoftSeal Linear Joint Seals, that may have been damaged
during installation.

The FIREPRO® SoftSeal Linear Joint Seal is supplied in strips 1200mm x 200mm x 100mm.
*Linear Joints over 300mm wide can be accommodated, with the addition of steel Z brackets.
For further information and advice on sizes or applications, please contact Rockwool Technical Solutions Team on 01656 862621.

SoftSeal installed as a linear joint seal

Performance

Fire performance
ROCKWOOL FIREPRO® SoftSeal Linear Joint Seal has been tested to the dedicated fire resistance standard
for linear joint seals BS EN1366-4 and shown to provide up to 4 hours fire performance (E240 & EI80).

Movement
As part of the testing to BS EN 1366-4, FIREPRO® SoftSeal was assessed for its movement capabilities, prior
to conducting the fire test. The product was tested to accommodate movement (expansion and contraction)
of +/-25%.

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Acoustics
Tested to EN 10140 based on two thicknesses with the following results:
• Rw 30 dB: When installed with 100mm thick SoftSeal Batt
• Rw 39 dB: When installed with 200mm thick SoftSeal Batt
• Dn,e,w 40 dB: When installed with 100mm thick SoftSeal Batt
• Dn,e,w 49 dB: When installed with 200mm thick SoftSeal Batt
Water permeability
Tested to EN 1027 - No leakage observed up to 300Pa.
Air permeability
• Tested to EN 1026 up to 600Pa.
• Leakage at 50Pa - 0.1/1.4 m³/m²/h.

Technical information
Standards and approvals
FIREPRO® SoftSeal has been tested and assessed to BS EN1366-4: 2006 + A1: 2010 and classified to EN 13501-2.
FIREPRO® SoftSeal Linear Joint Seal system has been CE marked against ETAG026-3.
Product information

Property Description
Length 1200mm
Width 200mm
Thickness 100mm
Fire resistance Up to 4 hours
Coating 1 side
Density 80Kg/m³
Movement +/- 25%

Installation
1. Measure the width of the linear joint to be sealed.
2. Cut the FIREPRO® SoftSeal Coated Strips up to 25% bigger than the joint width (dependent on
movement required), so when installed they are under compression.
3. Ensure substrate is clean and free of dust and debris.
4. Install the FIREPRO® SoftSeal Linear Joint Seal with the coating on the top surface.
5. Apply FIREPRO® SoftSeal Flexible Coating to the face of all joints between the seal and the substrate,
overlapping by 20mm.
6. Apply FIREPRO® SoftSeal Flexible Coating to the faces of all butt joints between pieces of Soft Seal
Linear Joint Seal.

Specification clauses
FIREPRO® SoftSeal System is associated with the following NBS clauses:
P12 Fire stopping systems
• 160 – Linear gap sealing

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LINEAR & TRAPEZOIDAL

FIRESTOP SYSTEM

LINEAR JOINT SEALS

Advantages
• Up to 4 hours fire resistance

• Suitable for walls ranging from 400kg/m3

• Manufactured for a wide range of profiles

• Easy installation

Description
Linear and Trapezoidal Firestop products are made from
dense, moisture resistant stone wool, allowing adequate
compression yet retaining the necessary lateral stiffness for
ease of installation.
The Linear and Trapezoidal Firestop System can be
manufactured to suit a wide range of steel profile dimensions.
All Firestop products are supplied in standard lengths of 1m.
Linear Firestop 2A
Figure 1 – Linear Firestop 2A
• Rectangular strips (installed under min. 5% compression)
• Thicknesses: 12.5, 20, 30, 40, 50, 60, 70, 80, 90, 100mm
• Widths: 100, 150, 200, 300, 400mm
• Fire resistance: Up to 4 hours
Trapezoidal Firestop 2B
• Trapezoidal strips (tight fit required)
Available for all profiled decks. Deck profile to be named at
time of order, e.g. Ribdeck 60, Alphalok etc.
Dovetail Infill Firestop Strip
• Supplied as narrow rectangular strips for pinched Figure 2 – Linear Firestop 2A and 2B
installation into nominated dovetail shaped deck profiles;
e.g. Holorib, Quickspan, Q51

Applications
Linear and Trapezoidal Firestop Systems have been
developed to provide up to 4 hours firestopping at the
junctions of compartment walls and floors.
Solutions illustrated are for masonry walls with a density of at
least 400 kg/m3 and include both fire integrity and insulation
criteria for concrete decks, composite decks and simple
profiled sheeting.
Figure 3 – Linear Firestop 2A and
Dovetail Infill Strip

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Performance
Fire performance
All fire ratings apply to gaps over walls constructed of dense aggregate blocks, lightweight aggregate
concrete, clay bricks or concrete blocks with a minimum density of 400kg/m3

For further information on dry wall systems, please contact ROCKWOOL Technical Support.

Fire resistance includes integrity and insulation criteria to BS 476: Part 20: 1987.

Note: Stated performance assumes fire resistance of supporting wall is no less than fire stop.

Min. wall thickness/ fire stop width Fire resistance (integrity and insulation)
100mm 2 hours
150mm 3 hours
200mm 4 hours
Chemical
ROCKWOOL stone wool insulation has a basaltic composition in which the refractory oxide components
have been enhanced for stability at high temperatures.

Stone wool is chemically inert. An aqueous extract of the wool is neutral (pH7) or slightly alkaline.

Biological
Linear and Trapezoidal Firestop Systems are completely rot proof, do not offer sustenance to vermin and
do not encourage the growth of fungi, moulds and bacteria.

Compatibility
ROCKWOOL products are compatible with all normal building and constructional materials with which
they are likely to come into contact.

Durability
ROCKWOOL materials will perform effectively throughout the lifetime of the building with a minimum of
maintenance (unless disturbed).

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Technical information
Standards and approvals
Linear and Trapezoidal Firestops have been tested to BS 476: Part 20: 1987 and can provide up to
4 hours fire protection.

Achieves Euroclass A1 in accordance with BS EN 13501-1.

LINEAR JOINT SEALS

Linear and Trapezoidal Firestops are third party approved with LPCB – certificate no. 022b.

This product has been authorised for use in LUL surface and sub-surface premises when installed in
accordance with this datasheet. Please refer to the LUL Approved Product Register at www.LU-apr.co.uk
for specific details.

Product information
Property Description
Length 1000mm
Width Up to 400mm
Thickness 12.5 – 100mm
Deck profiles Various
Density 110 Kg/m3
Fire resistance Up to 4 hours

Handling / storage
Linear and Trapezoidal Firestop materials are light and easy to handle and should be cut using a sharp
bladed knife. Store in dry conditions.

Maintenance
Once installed, Linear and Trapezoidal Firestop materials will need no maintenance unless disturbed.

Other information
For areas such as clean rooms, Firestop systems are available totally enclosed in shrink wrap.

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Installation
The following installation requirements must be met in order to reliably achieve the stated fire resistances.
• Linear Firestop 2A must be fitted as rectangular pieces, tightly butt jointed and compressed by at least
5% in thickness.
• Up to 3 layers may be used. Single layer firestopping will always be preferred, with multi-layer methods
limited to those occasions where building tolerances demand practicality. All layers should be installed
simultaneously. The height of void should not exceed the width of the Firestop.
• Gaps associated with perimeter floor slab/wall fire stopping should be achieved using ROCKWOOL SP
Firestop Systems.

Trapezoidal Firestop 2B Trapezoidal Firestop 2B

Linear Firestop 2A Linear Firestop 2A

Profile across a wall Profile along a wall

Figure 4 – Profiled metal deck over blockwork wall

Trapezoidal Firestop 2B Trapezoidal Firestop 2B

BeamClad or BeamClad or
ColumnClad Fire ColumnClad Fire
Protection Protection

Linear Firestop 2A Linear Firestop 2A

Without concrete Without lightweight concrete

Figure 5 – Profiled metal deck with/without concrete over a universal beam

Trapezoidal Trapezoidal
Firestop 2B Firestop 2B
Linear Firestop 2A Linear Firestop 2A Linear Firestop 2A

Profile across a wall Profile along a wall

Figure 6 – With / without profiled metal deck under a lightweight concrete slab

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Max 400mm 400mm or more

Trapezoidal Firestop 2B Trapezoidal Firestop 2B

Linear Firestop 2A Linear Firestop 2A

(Inserted under 5% (Inserted under 5%
compression) Fixing Fixing Fixing compression)

LINEAR JOINT SEALS

Profile across a wall Profile along a wall

Figure 7a & 7b – Metal profiles parallel but offset from the wall line

Fig 7a: The ‘overhang’ of the Linear Firestop 2Ashould be supported with steel self-tapping
screws or ‘hammer fix’ anchors into deck / concrete soffit at 350mm maximum centres
(minimum of 3 fixings per 1m length of fire stop).
Fig 7b: Where the Linear Firestop 2A is required to be fixed to the deck at distances in excess
of 400mm, turn the 1m length of fire stop 90° and cut to required size to suit profile spacing. In
such cases, secure each length of fire stop to the soffit using at least 2 fixings at both ends.

HARDROCK®
Multi-Fix (DD)
Trapezoidal
Firestop 2B Linear Firestop 2A
(Inserted under
5% compression)

Masonry fire
resisting wall

Figure 8 – ROCKWOOL Insulated flat roof deck with profiles perpendicular to the wall line

When fire stopping between the head of a fire resistant wall and the underside of a perforated roof deck
insulated with ROCKWOOL HARDROCK® Multi-Fix [DD] flat roof insulation, it should be considered best
practice to fill both the upper and lower deck profiles with Trapezoidal Firestop 2B products. In such
cases, when placing an order it should be noted that the sizes of the two profiles may differ.
In cases where combustible thermal insulation passes over the head of a fire resisting wall, guidance on
maintaining fire compartmentation is provided in Approved Document B (Volume 2, Section B3) of The
England and Wales Building Regulations 2000 (2006 edition). To reduce the risk of fire spreading to an
adjacent compartment in such cases, it may be necessary to extend the wall through the roof line or
introduce a ‘protected zone’ 1500mm either side of the fire resisting wall.

Specification clauses
Linear and Trapezoidal Firestops are associated with the following NBS clauses:
F30 Accessories/sundry items for brick/block/stone walling
• 670 Tops of non-loadbearing walls
G30 Metal profiled sheet decking
• 240 Fire resisting profile fillers

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FIREPRO® INTUMESCENT
EXPANSION JOINT SEAL

Advantages
• Up to 4 hours fire resistance

• Easy to install compression fit

• Dry fix solution

• Water resistant

Description Applications
Intumescent Expansion Joint Seal is a FIREPRO® Intumescent Expansion Joint
compressible strip formed by shrink Seal is installed by simply compressing
wrapping a graphite based intumescent by hand and then pushing into the
polymer to both faces of a ROCKWOOL joint. Adjacent pieces of the product
core. are tightly butted together. There
is no need to use any adhesives or
Intumescent Expansion Joint Seal is intumescent sealant in conjunction with
supplied in one metre lengths to suit the product.
the joint to be filled. The width of the
product is dependent on the fire rating In a fire, the graphite based intumescent
required (see Table 1). material swells to form a hard char,
which prevents the passage of fire and
smoke through the joint.

Intumescent Expansion Joint is suitable

for use in:
• Blockwork cavities
• Curtain wall/Concrete slab interfaces
• Expansion joints
• Structural joints

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Performance
Fire performance
ROCKWOOL Intumescent Expansion Joints to provide up to 4 hours rating for linear joints in walls & floors.

Table 1
Fire resistance performance

LINEAR
LINEAR
Gap width ‘Y’ (mm)

Seal depth ‘X’ (mm) 10-14 15-30 31-50 51-75

JOINT
[thickness of seal in brackets] Integrity rating (minutes)

JOINT
25 [x16] single 120 NA NA NA

SEALS
SEALS
50 [x16] single 240 NA NA NA
25 [x32] double NA 120 NA NA
50 [x32] double NA 240 NA NA
50 [x52] double NA NA 240 NA
50 [x78] double NA NA NA 240

Note: The thickness of the seal (in brackets) is designed to ensure compression when installing the seal
into the gap.

Figure 1

Solid wall

Y 50mm Second seal

minimum

Intumescent Expansion
Joint Seal

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Technical information
Standards and approvals
FIREPRO® Intumescent Expansion Joint Seal has been tested to BS 476: Part 20: 1987 and can provide
up to 4 hours fire protection in joints.
FIREPRO® Intumescent Expansion Joint Seal is third party accredited through IFC and Certifire.
Product Information

Property Description
Length 1000mm
Width 15-78mm
Thickness 25mm, 50mm
Fire resistance Up to 4 hours

Installation
Installation In floors
Intumescent Expansion Joint is used to prevent fire penetration through movement joints and gaps in walls
and concrete floors (Figure 2) for a specified period up to 4 hours. They are manufactured oversize to fit
under compression.
1. Remove all loose debris and loose debris from within the gap
2. Ensure correct width is installed to suit the required Fire Rating
3. Where the gap varies in the length to be sealed, ensure that the correct thickness is installed under
compression
4. Do NOT remove sleeving
5. Keep material dry and protect from impact damage
6. Compress and insert the strip into the gap ensuring tight butt joints

Figure 2

Specification clauses
FIREPRO® Intumescent Expansion Joint Seal is associated with the following NBS clauses:
E40 Designed joints in in-situ concrete
• 545 Compressible sealing strip system
F30 Accessories/sundry items for brick/block/stone walling
• 616 Fire resistant movement joints without sealant
• 670 Tops of non-loadbearing walls

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FIREPRO® ACOUSTIC
INTUMESCENT SEALANT

LINEAR
LINEAR
Advantages

JOINT
JOINT
• Up to 4 hours fire protection

SEALS
SEALS
• Acoustically tested

• Air leakage tested

• Suitable for linear joints up to 50mm wide

• Suitable with multiple substrates and services

• Increased movement capability

• Available as a trowel grade option

Description Applications
Acoustic Intumescent Sealant is a high Acoustic Intumescent Sealant is
specification, one part water based comprehensively tested for a wide
acrylic sealant. Acoustic Intumescent range of applications which include:
Sealant is designed for use in the
• Sealing service penetrations
installation of ROCKWOOL Ablative
Coated Batt, sealing linear joints and • Linear joint seals
some individual service penetrations
• Installation of Ablative Coated Batt
passing through various substrates.

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Performance
Standards and approvals
Acoustic Intumescent Sealant has been tested to BS EN 1366-3: 2009 and BS EN 1366-4: 2006 +A1:2010
and classified to EN 13501-2, providing up to 4 hours fire protection in joints up to 30mm.

Acoustic Intumescent Sealant has been CE marked against ETAG026-2.

Acoustic Intumescent Sealant is third party accredited through IFC and Certifire.

Acoustic Intumescent Sealant is third party approved with LPCB – certificate no. 022b(4)

Fire performance
AIS Tables – Fire protection

BS & EN Data for aerated concrete walls and floors with substrates
Substrate Certifier
Approval Application Gap width combination Integrity Installation document place
BS 476-20 Floor up to 50mm Variable up to 120 mins Single sided CF5577 - PG 4
EN 1366-3 Floor up to 50mm Variable up to 240 mins Upper face CF5577 - PG 7
EN 1366-4 Wall up to 50mm Variable up to 120 mins single sided CF5577 - PG 5 & 6
Substrates include AAC, Softwood and Steel – please refer to CF5577 for combinations and individual ratings

CERTIFICATE No CF 5577 - EN1366-4 +A1 Approval Matrix

ROCKWOOL® FIREPRO® Acoustic Intumescent Sealant

Max. joint Min. seal Integrity Insulation Movement
Configuration width (mm) depth (mm) Backing material (mins) (mins) %

Polyethylene
(min 150mm thick)
Wall constructions

20 (both 24 Shear
60* 20mm & 50mm 240 120
faces) 8.3 Lateral
Autoclaved diameter
aerated
75mm deep,
concrete 25 Shear
5 (either compressed 15%,
60* 240 60 12.5
face) stonewool 60kg/
Lateral
m3
* Pre movement Application technique: For good adhesion the surfaces of the building element
shall be free of any dust or grease and may need to be primed. On good clean,
virgin concrete & masonry, no priming required.

CERTIFICATE No CF 5577 - EN1366-4 +A1 Approval Matrix

ROCKWOOL® FIREPRO® Acoustic Intumescent Sealant

Max. joint Min. seal Integrity Insulation Movement
Configuration width (mm) depth (mm) Backing material (mins) (mins) %

Polyethylene
Floor constructions
(min 150mm thick)

20 (both
60* 20mm & 50mm 180 60 16.6 Lateral
faces)
Autoclaved diameter
aerated
100mm deep,
concrete
5 (either compressed
60* 240 240 25 Lateral
face) 15%, stonewool
60kg/m3
* Pre movement Application technique: For good adhesion the surfaces of the building element
shall be free of any dust or grease and may need to be primed. On good clean,
virgin concrete & masonry, no priming required.

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LINEAR JOINT
EN 1366-3:2009 – Rigid and flexible wall min 120 mm thick
Service type Pipe O/D Pipe wall thickness Annular gap Depth of sealant Classification
Copper and 15 mm ≥
0.8 mm ≥ 14.2 mm 10 mm 25mm (both faces) E120*
steel pipes 159 mm
* for insulation ratings please contact Rockwool Technical solutions

CERTIFICATE No CF 5577 - EN1366-3 Approval Matrix

Wall installations: Double sided seals - ROCKWOOL® FIREPRO® Acoustic Intumescent Sealant
Cut out Minimum seal Backing Integrity Insulation
Cable and cable tray size (mm) depth (mm) material (mins) (mins)

SEALS
Cables ≥ to 490mm long x 25 (both 75mm x 80kg/
120 90
Flexible or rigid wall

(min 150mm thick)

21mm 100mm high faces) m3 stone wool

constructions

Perforated
490mm long x 25 (both 70mm x 80kg/
cable tray 450 x 120 90
100mm high faces) m3 stone wool
50mm

Cables ≥ 21- 200mm long x 25 (both

N/A 90 60
60mm 100mm high faces)

Application technique: For good adhesion the surfaces of the building element shall be free of any dust
or grease and may need to be primed. On good clean, virgin concrete & masonry, no priming required.
Rigid walls: The wall must have a minimum thickness of 150mm and comprise concrete, aerated concrete
or masonry with a minimum deity of 450kg/m3.
Flexible walls: The walls must have a minimum thickness of 120mm and comprise timber or steel studs
lined on both faces with a minimum of 2 layers of 12.5mm thick “Type F” Gypsum board according to EN
520. In timber stud walls no part of the penetration shall be closer than 100mm to a stud, the cavity must
be closed between the penetration seal and the stud and a minimum of 100mm of insulation of Class A1
or A2 according to EN 13501-1 must be provided within the cavity between the penetration and the stud.
For further information, please refer to the ROCKWOOL standard details’

CERTIFICATE No CF 5577 - Air Permeability

ROCKWOOL® FIREPRO® Acoustic Intumescent Sealant- Approval Matrix

Air Permeability: Pressure Positive Negative Weather Not evaluated by this
EN1026 (PA) pressure pressure capability approval
(m3/h/m2) (m3/h/m2)
50 0 0
100 0 0
Acoustic Rating: Rw(C;Ctr) :38(-2;-7) dB Movement Movement parameters
BS EN ISO 10140- capability provided in the scope
3:1995 above

Smoke Toxicity BS R value of 0.19 Smoke Density Ao (max) value 0.004

6853: 1999 Annex BS 6853
B.1 Incorporating D.3: 1999
Amendment No.1 Incorporating
Amendment
No.1

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Acoustic performance

Weighted Sound Reduction Index (Rw) of up to 57dB dependant on:

• Type of construction
• Type of seal backing
• Size of joint

For specific information on acoustic performance please contact ROCKWOOL Technical Solutions on
01656 868490 or technical.solutions@rockwool.co.uk.

Product information
Property Description
Application temperature >5°C
Yield up to 5.9lm
Weighted sound reduction index up to 57dB
Fire resistance up to 4 hours
Shelf life 12 months

Installation
All surfaces must be thoroughly clean and free of bond breaking contaminants prior to application of the
sealant. No priming is required for most commercial substrates; however, it is recommended that before
installation the sealant is applied to a small area of the substrate to assess adhesion.

The sealant should not be applied if the ambient temperature is below 5°C as adhesion may be impaired.

The sealant is fast curing, approximately 15-minute tack free time. When fully cured, the sealant can be
overpainted.

Each cartridge/sausage is intended to provide the following application rates:

Joint size (mm) Depth of sealant (mm) Yield per cartridge (m) Yield per sausage (m)
10 10 3.10 5.90
20 15 1.03 1.95
30 20 0.51 0.95

Specification clauses
FIREPRO® Acoustic Intumescent Sealant is associated with the following NBS clauses:
• E40: Designed joints in in-situ concrete – 530 Sealant
• F30: Accessories/sundry items for brick/block/stone walling - 610 Movement joints with sealants
• L10: Windows/rooflights/screens/louvres – 790 Fire resisting frames
• L20: Doors/shutters/hatches – 820 Sealant joints
• P12: Fire stopping systems – 395 Sealant-One part fire resistance acrylic

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FIREPRO® FIRE RESISTANT

SILICONE SEALANT

LINEAR JOINT SEALS

Advantages
• Up to 4 hours fire resistance

• Easily applied cartridge application

• Sealing joints up to 40mm

• Suitable with multiple substrates

• Suitable in joints with high movement capability

• Durable – Up to 25 years service

Description Applications
ROCKWOOL Fire Resistant Silicone ROCKWOOL Fire Resistant Sealant is
Sealant is a one party alkoxy cure a high performance silicone which has
silicone supplied in 310ml cartridges. been designed for use in joints with
ROCKWOOL Fire Resistant Silicone high movement capability or where
Sealant offers excellent adhesion to a joints are formed between multiple
number of substrate types which include substrate types. ROCKWOOL Fire
steel and masonry. Resistant Silicone Sealant is suitable for
joints up to 40mm and can provide up
to 4 hours fire resistance.

Performance
Fire performance
Table 1 - Fire performance

Joint size Sealant Single or Integrity Insulation

(mm) depth (mm) Backing material Dimensions dual seal (in mins) (in mins)
15 10 PE 25mm diameter Single 240 120
15 10 Mineral wool 15mm thick x 10mm Dual 240 240
(density 90kg/m²) depth
25 15 PE 30mm diameter Single 240 120
40 25 Mineral wool 40 x 25mm depth Dual 240 240
(density 90kg/m²)

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Technical information
Standards and approvals
Fire Resistant Silicone Sealant is tested to BS 476: Part 20
Fire Resistant Silicone Sealant is third party accredited through IFC and Certifire.
Product information

Property Description
Pack size 310ml cartridge
Colour White
Application temperature ≥ 5°C
Yield 27lm/L
Fire resistance Up to 4 hours

Installation
Application of ROCKWOOL Fire Resistant Silicone Sealant it is a simple process as the product is
extruded from a cartridge loaded into a standard sealant gun. The depth of the joint will depend on the
gap to be filled and the fire rating required (see Table 1).
All surfaces must be thoroughly clean and free of bond breaking contaminants prior to application of the
sealant. No priming is required for most construction substrates; however, we recommended that a small
area be tested on substrates.
The sealant should not be applied if the ambient temperature is below 5° C as adhesion will be impaired.
Coverage
ROCKWOOL Fire Resistant Silicone Sealant is available in 310ml cartridges. One cartridge will provide
the following coverage rates:
Joint size (mm) Metres per litre
6x6 27.75
9x6 18.50
12x9 9.25
18x12 4.75
25x10 4.00

Specification clauses
ROCKWOOL Fire Resistant Silicone Sealant is associated with the following NBS clauses:
E40 Designed joints in in-situ concrete
• 530 Sealant
F30 Accessories/sundry items for brick/block stone walling
• 610 Movement joints with sealant
L10 Windows/Rooflights/Screens/Louvres
• 790 Fire resisting frames
L20 Doors/Shutters/Hatches
• 820 Sealant joints
P12 Fire stopping systems
• 395 Sealant: One part fire resisting acrylic

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SP FIRESTOP OSCB
60 & 120

LINEAR JOINT SEALS

Advantages
• Fully tested to “ASFP Technical Guidance Document
19: Fire resistance Test for ‘open-state’ cavity
barriers used in the external envelope or fabric of
buildings”

• Up to 120 minutes fire integrity and insulation

• Provides 25mm or 44mm airspace

• Satisfies NHBC and CWCT guidance for ventilation

gaps at cavity barrier locations

• Weather resistant

• Easy site storage and handling

• Combined with ROCKWOOL RAINSCREEN DUO

SLAB® it simplifies the design of high rise buildings
above 18m

Description
Specifically designed for use only in conjunction with ROCKWOOL RAINSCREEN
DUO SLAB®, SP Firestop OSCB forms an open-state cavity barrier within the
building facade, which allows for ventilation and drainage of the cavity under
service conditions.
SP Firestop OSCB is available in two variants giving up to 60 and 120 minutes’ fire
performance respectively: SP Firestop OSCB 60 and SP Firestop OSCB 120.
Each comprises of a continuous intumescent strip fixed to the leading edge of a foil
faced stone wool barrier, encapsulated by a weather-resistant polythene sleeve –
coloured white for OSCB 60 and red for OSCB 120.
Fully tested to ASFP TGD 19, the combination of non-combustible insulation with
an effective intumescent supports the construction of safe façade systems and aids
the design of high-rise buildings over 18m in height.
Installed horizontally and designed to ensure an appropriate open air space is
maintained, the SP Firestop OSCB is suitable for cavity widths up to 425mm (see
under ‘Performance’ for full details).

Applications
SP Firestop OSCB is suitable for use within ventilated façade systems.

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Performance
Please note that SP Firestop OSCB 120 must be specified at least 6mm thicker than the total thickness of
RAINSCREEN DUO SLAB® within in the cavity.

Maximum dimensions (mm) Fire performance (minutes)

Product Overall void Open cavity Integrity Insulation
SP Firestop OSCB 60 Up to 425 Up to 25 60 60
SP Firestop OSCB 120 Up to 300 Up to 44 120 120

• SP Firestop OSCB 60 achieves up to 60 minutes, with a maximum open cavity of 25mm and maximum
overall void of 425mm.

• SP Firestop OSCB 120 achieves up to 120 minutes, with a maximum open cavity of 44mm and
maximum overall void of 300mm.

Technical information
Standards & approvals
Fully tested to ASFP TGD 19, SP Firestop OSCB can comply with the following building regulations:

• England and Wales — Approved Document B

• Scotland—Technical Handbook Section 2

• Northern Ireland—Technical Booklet E

• Republic of Ireland—Technical Guidance Document B

Dimensions

Length: 1000mm
Thickness: 90mm

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SP Firestop OSCB 60 SP Firestop OSCB 120

Total cavity Rainscreen Product width Open cavity Product width Open cavity
size (mm) Duo Slab (mm) (mm) (mm) (mm) (mm)
100 50 75 25 56 44

LINEAR JOINT SEALS

110 60 85 25 66 44
120 70 95 25 76 44
125 75 100 25 81 44
130 80 105 25 86 44
140 90 115 25 96 44
150 100 125 25 106 44
160 110 135 25 116 44
170 120 145 25 126 44
175 125 150 25 131 44
180 130 155 25 136 44
190 140 165 25 146 44
200 150 175 25 156 44
210 160 185 25 166 44
220 170 195 25 176 44
230 180 205 25 186 44
240 190 215 25 196 44
250 200 225 25 206 44
260 210 235 25 216 44
270 220 245 25 226 44
275 225 250 25 231 44
280 230 255 25 236 44
290 240* 265 25 246 44
300 250* 275 25 256 44
310 260* 285 25 - -
320 270* 295 25 - -
330 280* 305 25 - -
340 290* 315 25 - -
350 300* 325 25 - -
360 310* 335 25 - -
370 320* 345 25 - -
380 330* 355 25 - -
390 340* 365 25 - -
400 350* 375 25 - -
410 360* 385 25 - -
420 370* 395 25 - -
425 375* 400 25 - -

*Thicknesses of RAINSCREEN DUO SLAB® over 230mm comprise two layers.

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Ancillary products

SP Fixing Brackets

Required for installation, these galvanised steel brackets are

supplied with SP Firestop OSCB at a rate of two per metre
length. Brackets are packaged in a separate cardboard box
located within the main SP Firestop OSCB packaging.

SP Fixing Brackets are designed to be easily re-profiled by hand

on site, and should be cut as necessary to ensure they penetrate
the barrier by approximately 75% of its width.

Stainless steel brackets are available as an option.

Pigtail screws
These are required only for SP Firestop OSCB 60, and are used
to secure the front-facing intumescent strip. These are supplied
at a rate of 3 per metre length and will be packaged with the SP
Firestop fixing brackets.
Care should be taken to ensure that the pigtail screws protrude
from the front face of the firestop by a maximum of 25mm.

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Installation
SP Firestop OSCB is only certified for use in conjunction with RAINSCREEN DUO SLAB®.

Note that the polythene wrap covering each section of barrier is not to be removed.

SP Firestop OSCB is supplied ready to install with two galvanised steel fixing brackets and four pigtail screws

LINEAR JOINT SEALS

per meter length.

The brackets should be mechanically and securely fixed to the wall at a maximum of 500mm centres
using non-combustible fixings.

The product is impaled mid-barrier depth onto the fixing brackets, which should penetrate the barrier by
approximately three-quarters of the product width. The barrier must be pushed back sufficiently to ensure
full contact with the supporting wall.

For SP Firestop OSCB 60 only, the front facing intumescent strip is secured to the barrier using the
supplied pigtail screws, three per metre length at a maximum of 333mm centres. These screws should
protrude from the front face of the barrier by a maximum of 25mm.

SP Firestop OSCB 120 should oversail the front face of the insulation, protruding into the cavity by at
least 6mm.

Adjacent lengths of barrier should be tightly butt jointed together.

For cut lengths, a minimum of two fixing brackets should be used.

Imperfections of up to 10mm can be filled with ROCKWOOL Acoustic Intumescent Sealant.

Maximum Total cavity width

500mm centres

Barrier width

Maximum
333mm centres Insulation thickness

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FIRE PROTECTION
Section 1 – Structural steel / concrete

Many building materials can lose significant strength when exposed to high temperatures. Providing fire
resistance to the load bearing structure of a building ensures that the building remains structurally stable
in the event of a fire.
The ROCKWOOL® range of fire protection products can withstand temperatures in excess of 1000°C
providing protection to steel and concrete structures for periods of up to 4 hours. This vital protection
ensure occupants can escape and firefighters can operate without the risk of collapse.

BEAMCLAD®
Systems

Soffit Slab

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Core products

STRUCTURAL STEEL / CONCRETE

• ROCKWOOL BEAMCLAD® Systems • ROCKWOOL Soffit Slab

Useful documents and standards

• ASFP Technical Guidance Document – TGD 14: Code of practice for the installation and
inspection of board systems for the fire protection of structural steel

• ASFP Yellow Book: Fire protection for structural steel in buildings

• ASFP: Ensuring best practice for passive fire protection in buildings

• BS 476-21: Fire test on building materials and structures. Method for determination of the
fire resistance of load bearing elements of construction

• BS EN 1365-2: Fire resistance test for load bearing elements. Floors & roofs

• BS EB 1365-3: Fire resistance test for load bearing elements. Beams

• BS EN 1365-4: Fire resistance test for load bearing elements. Columns

• BS EN 1363-1: Fire resistance tests. General Requirements

• BS EN 13501-2: Fire classification of construction products and building elements.

Classification using test data from resistance to fire tests, excluding ventilation services.

ASFP ( Association for Specialist Fire Protection) guidance documents can be sourced at www.asfp.org.uk

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SOFFIT
SLAB

Advantages
• Excellent thermal performance

• Effective acoustic insulation

• Non-combustible stone wool insulation and facing

options

• Up to 4 hours fire resistance

• Water repellent

• Easily cut to accommodate services

• Simply butt together at joints

• Hi-impact option for durability

Description
ROCKWOOL Soffit Slab is manufactured using high performing, non-combustible
stone wool insulation. Available with a plain, foil or tissue facing which can provide
up to 4 hours fire protection to the underside of concrete soffits.

Hi-impact Soffit Slab

With a 6mm rigid fiber cement board facing, this combination of two non-
combustible products provides increased impact resistance and durability. Available
in various thicknesses, the off-white facing can be easily decorated to match design
and colour schemes.

Applications
Suitable for use with concrete soffits where a thermal, fire or acoustic performance
is required.

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Performance
Fire performance
Soffit Slabs have been tested to BS EN 1363-1 to offer fire protection to reinforced concrete soffits. When
applied to the soffit using the recommended fixings and pattern, 130 and 140mm thick products, with
and without facings, provide 3 hours fire insulation and integrity to a minimum 90mm thick floor slab.
150 and 160mm thicknesses provide 4 hours to a minimum 150mm thick slab.

Thermal performance
ROCKWOOL® Soffit Slab has a thermal conductivity (k value) of 0.034 W/mK.

STRUCTURAL STEEL / CONCRETE

Thermal resistance of un-faced Soffit Slab:

• 130mm Soffit Slab: 3.82 m²K/W

• 145mm Soffit Slab: 4.26 m²K/W

• 160mm Soffit Slab: 4.70 m²K/W

A typical construction comprising of a 150mm concrete floor slab underlined with 130mm thick Soffit Slab
would achieve a U-value of 0.25W/m2K. A U-value of
0.20W/m2K can be achieved using 160mm thick Soffit Slab.

Technical information
Standards and approvals
ROCKWOOL® Soffit Slab achieves a reaction to fire classification of A1 as defined in BS EN 13501-1.

Compatibility
ROCKWOOL® Soffit Slabs are chemically inert and compatible with most materials with which they are
likely to come into contact in normal building applications.

Biological
ROCKWOOL® Soffit Slabs offer no sustenance to vermin and do not encourage the growth of fungi,
moulds or bacteria.

Product information

Property Description
Length 1000mm (High Impact – 1200mm)
Width 600mm
Thickness 130, 145, 160mm
Thermal conductivity 0.034 W/mK
Reaction to fire Euroclass A1
Fire resistance Up to 4 hours

Installation
When fixing a tile or modular system, it is advisable to start with a focus reference slab in the centre of
the soffit with subsequent slabs being fixed working towards each edge. The use of string lines or laser
alignment equipment will assist in ensuring alignment and squareness of the installation.

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Mechanical fixings
Soffit Slabs should be fixed direct to the concrete soffit using Ejot DDS fixings with the Ejot DDT70
washer or similar. Recommended number and pattern of fixings for each slab size are shown in figures
1 and 2 below. Care should be taken not to over-tighten fixings to prevent damage to slab surface. For
further information on fixing type and suitability, please refer to the fixing manufacturer.
Fixing size guide

Property High impact Soffit Slab Plain, foil & tissue faced Soffit Slab
Thickness 136mm 166mm 130mm 145mm 160mm
DDS 7.3 DDS 7.3 DDS 7.3 DDS 7.3 DDS 7.3
Ejot fixing
x 175mm x 200mm x 175mm x 175mm x 200mm
Ejot washer DDT 70mm

1000mm 1200mm

500mm 400mm 400mm

600mm

600mm
150mm
300mm
300mm

100mm
150mm
100mm

Figure 1 Figure 2

Light fittings and services

Soffit insulation products should not be used for supporting light fittings or services. Such installations
should be supported from the concrete soffit.

Specification clauses
The insulation/fire protection of the concrete soffit is to be ROCKWOOL® Soffit Slab alu-faced / High
impact / white tissue / black tissue / un-faced1 ...........mm thick2, as manufactured by ROCKWOOL®
Limited, Pencoed, Bridgend CF35 6NY and installed in accordance with the manufacturer’s
recommendations.
Delete as necessary. 2Insert required thickness.
1

NBS specification clauses

ROCKWOOL® Soffit Slab is associated with the following NBS Specification clauses:

• K11 Rigid sheet flooring/sheathing/decking/sarking/linings/casings

• 885 Fire Protection Board

• 890 Board

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FIREPRO®
GLUE

STRUCTURAL STEEL / CONCRETE

Advantages
• LUL Approved

• Easy to apply

• Sets in as little as 4 hours

• Can be used from -10ºC upward

Description
ROCKWOOL FIREPRO® Glue is a water based, fire resistant adhesive which is
supplied in 17kg tubs and 300ml cartridges.

Applications
FIREPRO® Glue is suitable for use with FIREPRO® BEAMCLAD and ROCKWOOL
Fire Duct Systems where glued joints or noggins are required. FIREPRO® Glue can
also be used in conjunction with other ROCKWOOL Stone Wool products where
there is a requirement for a fire resistant adhesive.

Frost exposure does not remove curing ability.

The use of FIREPRO® glue is not limited to particular temperatures and has been
tested when applied to surfaces with temperatures of -10°C and upwards, but the
curing rate in-situ can be affected by:
• Temperature (see Table 1)
• Air humidity
• Thickness of glue layer in a joint
• Air access to glued joint (i.e. not sealed off)

Note: The temperature of FIREPRO® glue must be 5°C or more when applied to
surfaces at lower temperatures.

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Performance
FIREPRO® Glue has been widely used in fire tests conducted on ROCKWOOL FIREPRO® Fire Protection
Systems where fire ratings of up to 4 hours have been achieved. For further information tested
applications please contact ROCKWOOL.

Technical information
Standards and approvals
This product has been authorised for use in LUL surface and sub-surface premises when installed in
accordance with this datasheet - please refer to the LUL Approved Product Register website www.LU-apr.
co.uk for specific details.

Product information
Property Description: Tub Description: Cartridge
Pack Size 17kg Tub 300ml Cartridge
Application Surface temperature of Surface temperature of
Temperature ≥ -10°C (Glue must be ≥ 5°C) ≥ -10°C (Glue must be ≥ 5°C)
Ph 11 11
Shelf Life 12 months 18 months
Fire Rating Up to 4 hours (When tested with Up to 4 hours (When tested with
ROCKWOOL Fire Protection ROCKWOOL Fire Protection Systems)
Systems)

Installation
Application of glue from tub is typically made by a pallet knife or trowel before pressing surfaces
together. The product must always be stirred before use to ensure a uniform product consistency.
Application of glue from cartridge is made using a sealant gun and spread evenly over the surface with
a spatula or similarly flat bladed tool. Fixing boards together is supplemented by nails, pins or staples
through noggin board joints and board joints.

Whilst steel surfaces may be acceptable when just moist to the touch, heavy water droplets, grease, scale
oxide, dust etc should be removed prior to the application of FIREPRO® glue.

Testing has shown that even if glued joints are immediately subjected to heavy frost exposure, the final
glued joint strength is not threatened, but curing is retarded.

Glue fixed noggins must be allowed to set fully before any attempt is made to fix cover boards. Table 1
suggests minimum times to allow such setting to occur between ROCKWOOL BEAMCLAD® noggins and
steelwork.

FIREPRO® Glue may be used to attach cover boards onto cured noggins (and in glued board joints),
provided that a 24 hour interval is acceptable before further trades work on such protected steelwork.

Note: When friction fitted glued joints are exposed to sub-zero temperatures either immediately, or at
some time during the curing process, adequate bond stability will form in approximately 1 hour. This
bond will be sufficient for cover boards to be applied. Full setting will continue as in Table 1 when frost
free conditions return, but stability will be provided by the supplementary pins or nails. The final strength
of the glued joints will not be affected by exposure to sub-zero temperatures during the curing process.

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Noggins to steelwork
Exhaustive testing has been made under various application conditions. All noggins fitted into steelwork
should be cut to provide an interference friction fit of approximately 0.5mm. Excessive oversizing causing
the noggins to bend should be avoided (refer to Figures 1-3).
The noggins should be installed so as to be just proud of the flange tips. For web depths greater than
500mm ‘solid’ noggins or ‘T’ noggins ROCKWOOL BEAMCLAD® must be used.
Again a nominal 0.5mm interference fit is recommended for all ambient conditions, but particularly for
winter working. All noggin edges in contact with steelwork must be glued.

Figure 1 Figure 1a

BeamClad

STRUCTURAL STEEL / CONCRETE

D d 533 N d 500
N = d + 0.5

120
Soldier noggin depth
N = d + 0.5mm, approx

Figure 2 Figure 2a
N
d 500 BeamClad
d 500
N = d + 0.5

120
Soldier noggins may be laminated provided
FIREPRO® Glue is used between laminated surfaces

Figure 3 Figure 3a
50mm
thick
N
d 500 Noggins at least
50mm thick
N = d + 0.5

120

Ambient conditions & curing times

For all year round working, noggins should be cut to provide approximately 0.5mm interference fit into
steelwork. Some friction in the fitting is required to satisfy all conditions and to provide a sensible limit to
glue thickness.
In typical dry summer conditions of 20°C, curing of the basic glue will occur in approximately 4 hours
before cover boards should be added onto the noggins.
The setting times of glue in moist air conditions is approximately 6-8 hours if the temperature is above
freezing point, or in approximately 1 hour at 20°C.

Table 1
Setting times for different conditions
Conditions Setting time
Approx 20°C dry conditions Approx 4 hours
Approx 3°C+ with moist air conditions Greater than 24 hours expected
-10°C to 0°C Adequate bond forms within 1 hour but full cure may be
delayed over 24 hours when temperatures 0 - 6°C
Storage
Generally storage should be made in frost free conditions. Should frost exposure
occur, the glue should be thawed out and thoroughly stirred.

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FIREPRO®
BEAMCLAD® SYSTEMS

Advantages
• Up to 4 hours fire resistance

• *Fire rated timber floor applications

• Moisture repellent

• Unique, dry clip fix system

• Quick and simple to apply

• No maintenance

Description
ROCKWOOL BEAMCLAD® is manufactured using high performing, non-
combustible stone wool insulation. Available in a plain, foil or tissue faced finish
BEAMCLAD® can provide up to 4 hours fire protection to structural steel.

ROCKWOOL BEAMCLAD® boards are sized 2000 x 1200mm, in a range of thicknesses

from 25mm up to 60mm.

Applications
FIREPRO® BEAMCLAD® Systems have been specially designed to provide fire
protection to structural steel for periods of up to 4 hours. BEAMCLAD® Systems
provide a flexible range of fixing solutions for all applications, these include:
• Dry, clip fix system
• Glued noggins/dry joint system
• Complete glued system
• Welded pins/glued joint system

FIREPRO® BEAMCLAD® can also be used to provide

fire protection to timber floor systems for periods of
up to 90mins with a complete dry fixed system.

High air flow applications

Un-faced ROCKWOOL BEAMCLAD® systems have
been evaluated for use in return air plenums, by the
Institute of Occupational Medicine to World Health
Organisation test standards and for use in subways,
for train speeds up to 150 km per hour. Figure 1
FIREPRO® BEAMCLAD® Systems

*For further information on fire rated timber floor applications please contact ROCKWOOL Technical Support.

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Performance
Fire performance
BEAMCLAD® Systems provide up to 4 hours fire resistance for structural steelwork, assessed at critical
temperatures between 350°C and 700°C, including the default temperatures of 550°C (columns) and
620°C (beams). Un-faced, aluminium-foil and glass tissue faced product options comply with non-
combustible definitions as referenced in UK Building Regulations.

Table 1
Fire performance of BEAMCLAD® Systems

STRUCTURAL STEEL / CONCRETE

Fire resistance (mins)
System 30 60 90 120 180 240
*
Clip fixed, dry application, dry
board joints
Glued noggins, dry application, dry
board joints
Welded pins, dry application, dry
board joints
Glued noggins, glued application,
glued board joints
Welded pins, dry application, glued
board joints
* For A/V up to 200m

Technical information
Standards and approvals

ROCKWOOL BEAMCLAD® fire protection materials have been assessed to BS 476: Part 21: 1987 for the
fire protection of loadbearing steelwork for up to 4 hours protection.

ROCKWOOL BEAMCLAD® achieves a reaction to fire classification of A1 as defined in BS EN 13501:1

ROCKWOOL BEAMCLAD® Systems are third party approved by the Loss Prevention Council Certification
board (LPCB) for performance and quality and are listed in the Red Book -certificate no. 022d.

This product has been authorised for use in LUL surface and sub-surface premises when installed in
accordance with this datasheet - please refer to the LUL Approved Product Register website www.LU-apr.
co.uk for specific details.

Product information
Property Description
Length 2000mm
Width 1200mm
Thickness 25 – 60mm
Density 167 – 180kg/m3
Reaction to fire Euroclass A1
Fire resistance Up to 4 hours

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Installation
FIREPRO® BEAMCLAD® Systems provide a flexible range of fixing options to meet a variety of site
requirements. BEAMCLAD® Systems can be broken down into two main types:

1) ROCKWOOL BEAMCLAD® Dry Joint Systems

These use purpose-made clips, glued mineral wool noggins or stud welded pins to secure the insulation
to all structural steel sections. All board-to-board joints are straight butt joints, without the need for glue.
Pigtail screws (minimum twice the insulation thickness, less 5mm) are used to secure the insulation boards
to each other and/or to the noggins.

2) ROCKWOOL BEAMCLAD® Glued Joint Systems

These use an inorganic and non-toxic glue to bind board-to-board joints and/or to the noggins. Standard
flat head nails, twice the thickness of the insulation, are used as initial supports.

Installation option 1: Dry board joint systems

Clip fix application

A quick and user-friendly dry joint board system featuring ROCKWOOL’s push-fit clips.

The spring action of the clip creates a vice-like grip on the steelwork flange. The ROCKWOOL
BEAMCLAD® board is impaled on to the clip pins and held in place with spring steel non-return washers.
Supplementary pigtail screws fixed through the side boards into the soffit boards complete this system.

The clips are located at max. 600mm centres to top flange and max. 900mm centres to bottom flange,
with pigtail screws for board to board joints at 150mm centres. A combined clip and stud welded pin dry
joint system can be used where it is not possible to clip fix, e.g. beneath concrete soffits. In this instance
stud welded pins (at the same fixing centres) are used in lieu of the clip fixing.

Note: A/V limit for 2 hours = 200

Figure 2 - Clip fix dry joint board system Figure 3 - Clip and stud welded pin dry joint system
(Up to 2 hours fire protection) (Up to 2 hours fire protection)

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Glued noggins application

A fast, easy to apply, dry joint board system where noggins are glued into position between the steelwork
flanges using FIREPRO® Glue. Noggins are fixed at 1000mm nominal centres. The ROCKWOOL
BEAMCLAD® boards are then retained by means of pigtail screws, fixed at 100mm nominal centres to the
noggins and 200mm centres for board-to-board joints.

The thickness of the noggin must be at least the thickness of the board being applied.

For beam depths over 533mm a Tee-noggin or full depth solid noggin is used to provide the support for
the cover boards.

STRUCTURAL STEEL / CONCRETE

Figure 4 - Glued noggins dry joint board system Figure 5 - Alternative Tee-noggin arrangement
(Up to 2 hours fire protection) (Up to 2 hours fire protection)

Stud welded pin application

A dry joint system employing steel welded pins.

The steelwork is cleaned in the area where the welded pin is to be positioned. The pin is then welded to
the steel flange.

The ROCKWOOL BEAMCLAD® board is then impaled on to the stud welded pins and held in place with
spring steel non-return washers.

The stud welded pins are fixed at max. 600mm centres to top flange and max. 900mm centres to bottom
flange. The ROCKWOOL BEAMCLAD® board-to board joints are then secured by means of pigtail screws
fixed at nominal 150mm centres.

Figure 6 - Stud welded pin dry joint board system Figure 7- Two-sided protection with stud welded pins
(Up to 2 hours fire protection) (Up to 2 hours fire protection)

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Installation option 2: Glue joint systems

Glue-fixed noggins and board-to-board glued joints

ROCKWOOL BEAMCLAD® noggins (at 1000mm nominal centres) are glued between the steelwork
flanges, and the ROCKWOOL BEAMCLAD® side boards are glued to the noggins. The ROCKWOOL
BEAMCLAD® side boards are also glued at all vertical joints and horizontal board-to-board joints.

Round head nails (length ≥ 2 x thickness of board) are fixed through the side boards into the noggins
(min 2) and soffit boards (at 400mm nominal centres) to consolidate the glued joints.

Figure 8 - Glue-fixed noggins and board-to-board glued joints (Up to 4 hours fire protection)

Stud welded pins and board-to-board glued joints

Pins are stud welded at max. 600mm centres to top flange and max. 900mm centres to bottom flange.
All board-to-board joints are glued and nailed.

Figure 9 - Stud welded pins and board-to-board glued joints (Up to 4 hours fire protection)

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FIREPRO® Glue – Coverage rates for glued joint systems

FIREPRO® Glue is an inorganic, non-toxic product with a pH of 11. FIREPRO® Glue is supplied pre-mixed
in 17kg tubs. A variety of joint types can be used (see previous page).

Coverage rate will depend on the linear length of the joints, width of joint (board thickness) and joint
depth. Assuming total, effective usage of the glue on site, the following table provides an approximate
weight (kg) of glue per linear metre of joint, based on a glue depth of 1mm.

ROCKWOOL BEAMCLAD® Square 45° mitre

STRUCTURAL STEEL / CONCRETE

thickness (mm) butt joint joint
25 0.09 0.13
30 0.11 0.16
35 0.13 0.19
40 0.15 0.21
50 0.19 0.27
60 0.22 0.33

In practice, a degree of wastage would be expected and as such, it would be prudent to make an
allowance for this when placing an order. As a very approximate guide, the coverage rate of a 17kg tub
of FIREPRO® glue would be 35m2 of applied board.

Note: Care should be taken when using FIREPRO® Glue with foil faced BEAMCLAD® as the alkalinity
of the glue is very high and can react with the foil. Avoid any contact between the glue and the foil
layer, if contact occurs remove the glue immediately with a damp cloth.Care should be taken when
using FIREPRO® Glue with foil faced BEAMCLAD® as the alkalinity of the glue is very high and can react
with the foil. Avoid any contact between the glue and the foil layer, if contact occurs remove the glue
immediately with a damp cloth.

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Board jointing options

Butted corner joints: Butted corner joints are made with square edge boards using either a dry joint with
pigtail screws as below, or FIREPRO® Glue and nails at 400mm centres.
Axial joints: All axial joints are made with square butt edges, without nails. Glue is only required for glued
board systems. For Foil faced products, joints can be finished with Class ‘O’ foil tape.
Noggins: ROCKWOOL BEAMCLAD® boards can be fixed to noggins, cut from ROCKWOOL
BEAMCLAD® offcuts of at least the same thickness as the facia and soffit boards.
The edges of the noggins are glued where they contact the steelwork, then, once the glue has set firmly,
the cover boards are fixed in position with either pigtail screws or FIREPRO® Glue and nails.
Welded steel pins: Boards are impaled onto stud welded pins and secured with non-return washers.

Pigtail screws at 150 or 200mm nominal

centres (see system options)

Dry joint
Screw length = minimum 2 x thickness of
cover board - 5mm

FIREPRO® Glue

Figure 10

Cellular beams
Thickness calculation method
The method for determining the thickness of ROCKWOOL BEAMCLAD® required to protect a cellular or
castellated beam:
• Calculate the effective section factor using the following equation:
• Section factor (m-1) = 1400 / t, where t = the thickness (mm) of the lower
steel web
• Confirm the limiting design temperature of the beam with the manufacturer. In the absence of such
information, a conservative fail temperature of 450°C can be used.
• Using the calculated section factor and protection period required, determine the thickness of
ROCKWOOL BEAMCLAD® for a solid beam from the appropriate fire protection table for the limiting
design temperature (or 450°C) and the fixing system being considered.
• Multiply this thickness by 1.20 to obtain the ROCKWOOL BEAMCLAD® thickness for the cellular or
castellated beam.

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Installation options – Cellular beams

STRUCTURAL STEEL / CONCRETE

Figure 11 - Beam with circular holes Figure 12 - Beam with square or rectangular holes
(boxed and profiled protection - glued and pinned (boxed and profiled protection - glued and pinned
joints) joints)

Figure 13 - Beam with circular holes Figure 14 - Beam with square or rectangular holes
(boxed protection - dry joints) (boxed protection - dry joints)

Noggins located either side of beam aperture (required for pin or noggin systems and may be in addition
to normal noggins, depending on size and frequency of apertures)

FIREPRO® BEAMCLAD® System Ancillaries

• Pigtail screws are available from ROCKWOOL stockists.
• ROCKWOOL BEAMCLAD® clips are available in 2 sizes from ROCKWOOL in boxes of 1000 - small for
25mm and boxes of 750 - large for 35mm & 40mm.
• Washers are available from ROCKWOOL in boxes of 2000.
• Welded pins and sprung steel non-return washers are available from external suppliers.
• Fire Tube is also available for circular steel sections.
• Fire Duct dry fix ductwork solutions are also available for steel duct protection.

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Specification clauses
(to be read in conjunction with System Options on previous pages)
1. The structural steel is to be fire protected using ROCKWOOL BEAMCLAD®.......s system, with a.......f
facing, to provide.......h fire resistance.
2. The main fixing system will be one of:
• ROCKWOOL BEAMCLAD® clip system fixed at max. 600mm centres to top flange, and max. 900mm
centres to bottom flange,
• ROCKWOOL BEAMCLAD® noggin system fixed at 1000mm centres,
• ROCKWOOL BEAMCLAD® stud welded pin system fixed at max. 600mm centres to top flange, and
max. 900mm centres to bottom flange.
3. Board-to-board joints should be dry fixed using pigtail screws or glued and nailed in accordance with
the data sheet.
s
insert system type
f
insert facing option
h
insert period of fire resistance

NBS specification clauses

FIREPRO® BEAMCLAD® Systems are associated with the following NBS Specification clauses:
K11 Rigid sheet flooring/sheathing/decking/sarking/linings/casings
• 885 Fire protection board
• 890 Board

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ROCKWOOL BEAMCLAD®
SYSTEMS CONTRACTOR
FIXING GUIDE
ROCKWOOL BEAMCLAD® Systems

STRUCTURAL STEEL / CONCRETE

boast a complete ‘tool-box’ of options.
They offer contractors simple and
economical fire protection solutions to
the very real diversity of modern steel
constructions.

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ROCKWOOL BEAMCLAD® SYSTEMS

CONTRACTOR FIXING GUIDE

This document explains and illustrates the installation

methods using the six fixing options:
• Clip fix dry joint board system
• Stud welded pin dry joint board system
• Glued noggins dry joint board system
• Combined clip and stud welded pin dry joint system
• Stud welded pin glued jointed board system
• Glue fix noggin, glued jointed board system
• Tested and approved for solid and cellular sections

ROCKWOOL BEAMCLAD® Boards

BEAMCLAD boards are available with facings of glass tissue and reinforced aluminium foil as well as plain
product. Size: 2000 x 1200mm. Standard thicknesses: 23, 30, 35, 40 and 50mm
Scope
Contractors are required to install materials as tested and detailed in this brochure. In situations not
covered by this brochure, ROCKWOOL will either recommend a suitable detail or assist in obtaining an
independent Design Appraisal.
Applications
This Fixing Guide provides details of all of the standard boxed applications. It covers fixing centres and
details of available facings and joint details. Dry board joints for up to 2 hours and Glued Joints up to 4
hours protection. Profiled application methods are also available with the glued joint systems – details
available from ROCKWOOL Technical Solutions.
Clip fix, dry joint board system
The ROCKWOOL push-fit clip system offers extremely fast application rates as no glue is required and
no plant or equipment is needed. The clip is fitted onto the steel flange by pushing it until a definite,
audible click is heard. Board-to-board edge joints are fixed with pigtail screws.
Glued noggin or stud welded pin, dry joint board systems
Welded pin and glued noggin fixing solutions with dry joints are extremely quick to apply, reduce system
installation costs and eliminate the need for glue. Fixing centres are the same as for the glued systems.
Combination systems
A combination of stud welded pins to the top flange and friction fit clips to the bottom flange can be
used with concrete decks.
Glued noggin fix and stud welded pin systems – Glued joints
The glued joint ROCKWOOL BEAMCLAD® systems remain for the applications that require fire protection
periods of up to 4 hours.

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Benefits
• Simple to apply, dry push-fit
• Fast application rates
• No plant or equipment required
• Up to 2 hours fire protection
• Max. 2 hours A/V = 200

STRUCTURAL STEEL / CONCRETE

• Option of three finishes
• Easy system to repair, if damaged
• Clean, dry solution allowing other trades to
work in same area during installation

Figure 1
Clip fix, dry joint board system

Benefits
• Simple to apply, glued noggin, dry
butt board joints
• Speed of installation increased
• Noggins spaced at 1000mm centres
• Tee- noggins of same thickness
insulation used with web depths of
over 533mm
• Up to 2 hours fire protection
• Easy system to repair, if damaged
• No masking of area required during
installation Pigtail screws at 200mm
Figure 2 centres in place of glued board joints
Glued noggins, dry joint system

Benefits
• Fast to install, dry fix stud welded pin
system
• Only dry joint stud welded pin solution
• Stud pin fixing centres at max. 600mm
ctrs for top flange and max. 900mm
for bottom flange
• Up to 2 hours fire protection
• Pigtail screws at max. 150mm centres
in place of glued board joints

Figure 3
Stud welded pin, dry joint board system

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ROCKWOOL BEAMCLAD®
Clip fix dry joint board system
The unique ROCKWOOL BEAMCLAD® clip fixing system is designed for ultimate speed of application.
Its design features allow it to be used with standard steel deck types. The ROCKWOOL BEAMCLAD® clip
fixing solution can be used to provide 2, 3 and 4-sided beam protection for up to 2 hours*.
* 2 hour A/V limitation: 200m-1

Installation sequence
1. Friction fit the correct length clips (see A/V chart) onto the top and bottom flange tips at max. 600mm
centres for the top flange (A) & max. 900mm centres for the bottom flange. (D) The first clip is
positioned at max. 100mm in from the beam edge (B).
2. Cut the ROCKWOOL BEAMCLAD® boards to suit the depth of the beam whilst allowing for the
additional flange cover board thickness.
3. Using the deck soffit as a guide, impale the ROCKWOOL BEAMCLAD® boards onto the clip legs,
always starting at the top.
4. Fit special ROCKWOOL BEAMCLAD® non-return washers onto the ROCKWOOL BEAMCLAD® clip legs
and push washers tight to the insulation face.
5. Apply pigtail screws horizontally at 150mm maximum centres, starting max. 75mm from the board’s
vertical edge (C). Minimum screw length must be 2 x cover board thickness -5mm.
6. Tape joints with foil tape or scrim tape if required.

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Chart 1
260
ROCKWOOL BEAMCLAD® clip system:
240 Critical steel tempeature 620°C, 3 sided
220 protection for beams
200
200
180
Section factor A/V (m-1)

D
160
159
140 C

STRUCTURAL STEEL / CONCRETE

A A A
120 124
100 B
95
80
60
A
40
20
0
½ 1 1½ 2
Fire resistance period (hours)

Chart 2
260
ROCKWOOL BEAMCLAD® clip system:
240
C Critical steel tempeature 550°C, 4 sided
220 protection for beams & columns
200 206
180 B
Section factor A/V (m-1)

160
140 148
A A
120 D - 128
100 C - 104
80 A B - 84
60 65
40
A
20
0
½ 1 1½ 2
Fire resistance period (hours)

ROCKWOOL BEAMCLAD® thicknesses to be read with Chart 1 & 2

The following key provides the required minimum thicknesses of ROCKWOOL

BEAMCLAD® for the Section Factors given in the table.

A = 25mm - Use small clips

B = 30mm - Use small clips

C = 35mm - Use large clips

D = 40mm - Use large clips

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Typical details

Figure 4 Figure 5
3-sided box 2-sided box

Fixing patterns

A
C D
A
B
D
D

Figure 6
3-sided box with ROCKWOOL BEAMCLAD® clip fixing

Dimensions
A = Top flange clips at max. 600mm centres for
2000mm boards (& 500mm centres if 1200mm
board length used
B = Clips at max. 100mm from edge of board
(20mm min)
C = Pigtail screws at max.150mm centres, and max.
75mm from board edge
D = Bottom flange clips at max. 900mm centres.

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 ROCKWOOL® FIREPRO® - FIRE PROTECTION

A A

W>100

STRUCTURAL STEEL / CONCRETE

B B

C C

Figure 7
Combined clip and stud welded pin dry
joint systems
With concrete decks it may be necessary Figure 8
to fix stud welded pins to the top flange 3-sided box
in place of clips.

Dimensions
A = Pins at max. 600mm centres
B = Clips at max. 900mm centres
C = Pigtail screws at max .150mm centres
D = Steel supporting angle

Steel deck Steel deck

W>100

Figure 9 Figure 10
3-sided box 3-sided box

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ROCKWOOL BEAMCLAD®
Stud welded pin dry joint board system
A traditional stud welded pin solution with dry joints. This dry fix pin solution can be used for 2, 3 and
4-sided beam protection for a period of up to 2 hours.

Installation sequence
1. Clean the local area for pin welding and fix stud pin using arc or CD welds, ensuring a good contact
has been achieved. Test weld by bending pin.
2. Impale the ROCKWOOL BEAMCLAD® boards onto the stud welded pins using the deck soffit as a
guide.
3. Push 38mm diameter sprung steel non-return washers onto the exposed pin until tight to the cover
board face. Crop pins as necessary.
4. Fix pigtail screws along all board-to-board edge joints at 150mm maximum centres (c). Tape joints
using aluminium foil tape or scrim, if required.

Chart 3 Chart 4

260 260
F
240 251 240 H
C
220 E 220 225
200 200 206 G
200
180 180 B 187
Section factor A/V (m-1)

Section factor A/V (m-1)

D
F
160 160
159 155
140 C 140 148
A A A A A E
120 124 120 D - 128
B
100 100 C - 104
95
80 80 A B - 84
60 60 65
A
40 40 A
20 20
0 0
½ 1 1½ 2 ½ 1 1½ 2
Fire resistance period (hours) Fire resistance period (hours)

ROCKWOOL BEAMCLAD® stud welded pin dry joint ROCKWOOL BEAMCLAD® stud welded pin dry joint
system: Critical steel temperature 620°C, 3 sided system: Critical steel temperature 550°C, 4 sided
protection for beams protection for beams & columns

ROCKWOOL BEAMCLAD® thicknesses to be read with Chart 3 & 4

The following key provides the required minimum thicknesses of ROCKWOOL

BEAMCLAD® for the Section Factors given in the table.

A = 25mm E = 45mm
B = 30mm F = 50mm
C = 35mm G = 55mm
D = 40mm H = 60mm

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Typical details

STRUCTURAL STEEL / CONCRETE

Pins at max 900mm
c/c to bottom flange
see D below

Pigtail screws at
max 150mm c/c

Figure 11 Figure 12
3-sided box 4-sided box

Fixing Patterns

B
A
B

A A
C D
A
A D
D B
C
A D
B D
D

Figure 13 Figure 14
3-sided box with stud welded pins 2-sided box with stud welded pins

Dimensions
A = Stud welded pins at max. 600mm centres for 2000mm board (500mm centres for 1200mm boards)
B = Stud welded pins, 20mm min. from edge of board
C = Pigtail screws at max. 150mm centres, and 75mm from edge of board
D = Bottom flange stud welded pins at max. 900mm centres

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20 min

W≤100 W>100

Pigtail screws
at 150 max c/c

Central row of welded pins* Central row of welded

required at max. 900mm ctrs pins* required at max.
900mm ctrs for flanges
up to 200mm

Figure 15 Figure 16
2-sided box 2-sided box - W limit is 100mm. Where
W >100mm a shelf angle or similar
should be fixed to the wall

* For flange widths greater than 200mm,

2 rows of pins are required, each row
approx. 25mm from flange tips.

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ROCKWOOL BEAMCLAD®
Glued noggin dry joint board system
A noggin solution which removes the necessity for glue to board-to-board and board-to-noggin joints. The
board-to-board edge joints are fixed with pigtail screws at 200mm centres. The glued noggins are at 1000mm
fixing centres. This fixing solution can be used for 2, 3 and 4-sided beam protection for up to 2 hours.

Installation sequence
1. Cut 120mm wide noggins (C) to suit web depth, using same thickness material as the cover protection.
For web depths of 500mm and above use either solid noggins or ‘T’ shaped noggins made from cover

STRUCTURAL STEEL / CONCRETE

board thickness. These are then glued into position at 1000mm centres (D).
2. Cut the ROCKWOOL BEAMCLAD® boards to suit the depth of the beam whilst allowing for the
additional flange cover board thickness.
3. Push board tight to deck soffit and fix pigtail screws through the coverboards and into the noggins at
maximum 100mm centres (B).
4. Fix all board-to-board joints using pigtail screws at 200mm maximum centres (A). Minimum screw
length must be 2 x cover board thickness – 5mm.

Chart 5 Chart 6

260 260
H
240 252 240 H
B C
220 G 220
221
200 209 200 G
202
196 F
180 180 184
Section factor A/V (m-1)

Section factor A/V (m-1)

B
173 F
160 160
E
140 140 153
A A 143 A A 146 E
120 D 120 126
A C - 116 D
100 100
C - 103
80 B - 93 80 A B - 83
60 73 60 65
40 A 40
A
20 20
0 0
½ 1 1½ 2 ½ 1 1½ 2
Fire resistance period (hours) Fire resistance period (hours)

ROCKWOOL BEAMCLAD® glued noggin dry joint ROCKWOOL BEAMCLAD® glued noggin dry joint
board system: Critical steel temperature 620°C, 3 board system: Critical steel temperature 550°C, 4
sided protection for beams sided protection for beams & columns

ROCKWOOL BEAMCLAD® thicknesses to be read with Chart 5 & 6

The following key provides the required minimum thicknesses of ROCKWOOL

BEAMCLAD® for the Section Factors given in the table.

A = 25mm E = 45mm
B = 30mm F = 50mm
C = 35mm G = 55mm
D = 40mm H = 60mm

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Typical details

Figure 17 Figure 18
3-sided box Tee-noggin arrangement for web depths of over
500mm. See over for Tee-noggin specification
Fixing patterns

Noggin thickness in 25mm

min or equal to facing
board thickness, if this is
greater than 25mm. Use
BeamClad offcuts

A B

B
E C A
A
B
D

Figure 19 Figure 20
3-sided box using glued noggins 2-sided box with stud welded pins

Dimensions Dimensions
A = Pigtail screws at max. 200mm centres and A = Welded pins at max. 900mm centres for
50mm max from edge of board 2000mm board (500mm centres for 1200mm
boards)
B = Pigtail screws at max. 100mm centres into
noggins B = Welded pins at max. 100mm (min. 20mm)
from board edge
C = Noggins of min. 120mm width
D = Noggins at max. 1000mm centres
E = Board length 2000mm

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20 min

100 max

STRUCTURAL STEEL / CONCRETE

W>100 25 max
W≤100 100 max

Central row of welded pins* Board fixed by FIREPRO®

required at max. 900mm ctrs glue to shelf angle

Figure 21 Figure 22
2-sided box 2-sided box - W limit is 100mm. Where W
>100mm a shelf angle or similar should be
fixed to the wall

* For flange widths greater than 200mm, 2

rows of pins are required, each row approx.
25mm from flange tips.

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ROCKWOOL BEAMCLAD®
Glued joint systems
The following two systems are well established having been used for many years. The application
of FIREPRO® Glue enhances the fire performance over the Dry Joint Systems for the 2, 3 and 4 hour
periods. The Glue Joint Systems are capable of providing up to 4 hours fire protection.

Fixing boards to noggins

Wherever three or four-sided protection is required, fixing to noggins is a practical option. No power
supply is required.

Fixing boards with stud welded pins

Situations will always occur where noggins do not afford a practical choice, e g. for two-sided box
constructions or diverse perimeter bracketing.
Stud welded pins allow the installer a simple, tested alternative to noggins.

Installation sequence (noggin fix)

Fixing noggins
Cut 120mm wide noggins to suit web depth, using same thickness material as the cover protection. For
web depths of 500mm and above use either solid noggins or ‘T’ shaped noggins. For stability purposes,
it is recommended that the face of the ‘T’ noggin is made from the same thickness as the cover board
but the thickness of the return into the web should be at least 50mm. These are then glued into position
at 1000mm centres.
Fixing boards
Apply FIREPRO® Glue liberally to face of noggins. Quickly apply vertical boards and secure with nails
long enough to pierce full thickness of noggins before FIREPRO® glue forms a hardened surface.
Apply glue continuously and liberally to all board interfaces. Tightly butt to adjoining boards and nail
through edge joints with same length nails as for noggins, at 400mm maximum centres.

Installation sequence (stud welded pin fix)

1. Fit stud welded pins (3mm diameter) as indicated opposite.
2. A selection of pins should be mechanically tested by bending from the vertical and returning it to the
original position.
3. Sprung steel non-return washers to secure boards.
4. Apply FIREPRO® glue to all board-to-board joints.
5. Offer up flange boards and nail through glued corner joints at 400mm maximum centres.
6. If using faced boards, apply foil or scrim tape over joints for uniformity of appearance.
For additional fixing details not covered, please contact ROCKWOOL Technical Solutions.
For A/V charts, see Charts 3 and 4 (Stud Welded).

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Typical details

Min recommended
thickness 50mm

If greater
than 500mm

STRUCTURAL STEEL / CONCRETE

Min 120mm
width

A A
Figure 23 Figure 24
3-sided box, noggins to project slightly Full depth noggin or Tee-noggin for web depths
beyond flange greater than 500mm

Fixing patterns

A
A
A
B D
C
A
C B
D

Figure 25 Figure 26 - Stud welded pin fixing arrangement

Fixing method using glued noggins, nails and 3-sided box with stud welded pins
glued board-to-board joints
Dimensions Dimensions
A = Noggins at max. 1000mm centres A = Stud welded pins at 600mm for 2000mm board
(500mm for 1200mm boards)
B = Nails at max. 150mm centres
B = Stud welded pins at max. 100mm (min. 20mm)
C = Nails at max. 400mm centres (max.
from edge of board
30mm from edge of board joint)
C = Nails at max. 400mm centres
D = Stud welded pins at max. 900mm centres for
2000mm boards, 500mm centres for 1200mm
boards, on bottom flange

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20 min

W≤100 W>100 25 max

Central row of welded pins* Board fixed by FIREPRO®

required at max. 900mm ctrs glue to shelf angle

Figure 27 Figure 28
2-sided box 2-sided box - W. Limit is 100mm. For
W>100mm, a shelf angle or similar
should be fixed to the wall

* For flange widths greater than 200mm,

2 rows of pins are required, each row
approx. 25mm from flange tips.

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Selecting the thickness of ROCKWOOL BEAMCLAD® Board for glued systems

Chart 7 Chart 8 Chart 9

260 260 260

C I
240 240 E J 240 L
237 238 C
235
220 220 220 G
L 219
H 216 214
200 B 200 200 207
199 I K
D
Section factor A/V (m-1)

Section factor A/V (m-1)

Section factor A/V (m-1)

180 K 180 186 180 187
178 B
176

STRUCTURAL STEEL / CONCRETE

168 170 L F
160 165 160 168 160 J
G H 157 155
J C 149
140 140 K 140 143 L-129
A A A 136 A A A A A E
F-132 I 130 131 131 128 I
120 120 120 124
J
B G 109
D 116 K
100 E-113 112 100 100
H I 104 H
A D-95 90 98 F-99 90 C 92 J-96
80 G 80 E-85 H 80 A
C-80 F-70 B-83 G I-81
D-73 G-73 F-72
60 B-65 E-62 60 60 E-62 H-68
D-53 A C-61 E-50
F-57
D-54 G-55
40 52 40 B-50 40
45 43 A 45 44
40
20 A C 20 20 C F
A D
0 0 0
½ 1 1½ 2 3 4 ½ 1 1½ 2 3 4 ½ 1 1½ 2 3 4
Fire resistance period (hours) Fire resistance period (hours) Fire resistance period (hours)

Steel beam sections ROCKWOOL Steel beam sections ROCKWOOL Steel column sections
BEAMCLAD® glued joint systems: BEAMCLAD® glued joint systems: ROCKWOOL BEAMCLAD®
Critical steel temperature 620°C Critical steel temperature 550°C glued joint systems: Critical
steel temperature 550°C

ROCKWOOL BEAMCLAD® thicknesses to be read with Charts 7, 8 & 9

The following key provides the required minimum thicknesses of ROCKWOOL

BEAMCLAD® for the Section Factors given in the tables. The boards can be
applied in either one or two layers.

A = 25mm E = 45mm I = 80mm

B = 30mm F = 50mm J = 90mm
C = 35mm G = 55mm K = 100mm
D = 40mm H = 60mm L = 110mm

Multi-layer applications
When a protection thickness in excess of 60mm is required, this can be achieved by plying two or more
layers of ROCKWOOL BEAMCLAD® together. Where practical, stagger the joints between each layer.

For welded pin applications, each layer should be retained using separate non-return washer, i.e. one
washer per layer.

For glued noggin applications, attach the first layer to the noggins as previously detailed, then apply a
120mm wide band of glue to the outside face of the first layer at locations corresponding to the noggins.

Apply the outer layer of ROCKWOOL BEAMCLAD®, supporting the boards until the glue sets by using nails
of sufficient length to penetrate completely through the noggins.

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General notes
Board jointing
Butted corner joints
Butted corner joints are made with square edge boards and depending on the system employed, use either a
dry joint with pigtail screws at 150mm or 200mm centres, or FIREPRO® Glue and nails at 400mm centres.

Dry joint

Pigtail screws at 150 or 200mm nominal centre

(see system options)

Screw length = minimum 2 x thickness

of cover board - 5mm

Figure 29

Axial joints
All axial joints are made with square butt edges, without nails. Glue is only required for glued board
systems. Joints must be tightly butted.
For foil faced products, joints can be finished with Class ‘O’ foil tape.

FIREPRO® glue

Figure 30

Noggins
ROCKWOOL BEAMCLAD® boards can be fixed to noggins, cut from ROCKWOOL BEAMCLAD® offcuts.
The edges of the noggins are glued where they contact the steelwork. Once the noggins have set firmly,
the cover boards are fixed in position with either pigtail screws or FIREPRO® Glue and nails. The thickness
of the noggin is to be the same as that of the cover board used.

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Welded steel pins

Boards are secured to stud welded pins with non-return washers.
Glue
Glue FIREPRO® Glue is required between all board-toboard and board-to-noggin joints for glued
systems, but only between noggin-to- steel joints for dry systems.
Applying FIREPRO® Glue on the external face of joints is bad practice.
Whatever noggin system is employed, the glue between noggin and steel must be allowed to set hard
before cover boards are applied to the noggins. This will normally take about 4 hours at 20°C ambient
temperature.

STRUCTURAL STEEL / CONCRETE

FIREPRO® Glue is supplied pre-mixed in 17kg tubs.
Coverage rate will depend on the linear length of the joints, width of joint (board thickness) and joint
depth. Assuming total, effective useage of the glue on site, the following table provides an approximate
weight (kg) of glue per linear metre of joint, based on a glue depth of 1mm.

Table 1

ROCKWOOL BEAMCLAD® thickness (mm) Square butt joint 45° mitre joint
25 0.09 0.13
30 0.11 0.16
35 0.13 0.19
40 0.15 0.21
50 0.19 0.27
60 0.22 0.33

In practice, a degree of wastage would be expected and as such, it would be prudent to make an
allowance for this when placing an order. As a very approximate guide, the coverage rate of a 17kg tub
of FIREPRO® glue would be 35m2 of applied board.

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Table 2 - Universal beams A/V table (as per 2006)

Designation Mass per Depth per Width per Thickness Flange Area of m-1 m-1
serial size metre (kg) section D (mm) section B (mm) web t (mm) T (mm) section
(cm2)
914x419 388 921.0 420.5 21.5 36.6 494.5 45 55
343 911.4 418.5 19.4 32.0 437.5 50 60
914x305 289 926.6 307.8 19.6 32.0 368.8 60 65
253 918.5 305.5 17.3 27.9 322.8 65 75
224 910.3 304.1 15.9 23.9 285.3 75 85
201 903.0 303.0 15.2 20.2 256.4 80 95
838x292 226 850.9 293.8 16.1 26.8 288.7 70 80
194 840.7 292.4 14.7 21.7 247.2 80 90
176 834.9 291.6 14.0 18.8 224.1 90 100
762x267 197 769.6 268.0 15.6 25.4 250.8 70 85
173 762.0 266.7 14.3 21.6 220.5 80 95
147 753.9 265.3 12.9 17.5 188.1 95 110
686x254 170 692.9 255.8 14.5 23.7 216.6 75 90
152 687.6 254.5 13.2 21.0 193.8 85 95
140 683.5 253.7 12.4 19.0 178.6 90 105
125 677.9 253.0 11.7 16.2 159.6 100 115
610x305 238 633.0 311.5 18.6 31.4 303.8 50 60
179 617.5 307.0 14.1 23.6 227.9 70 80
149 609.6 304.8 11.9 19.7 190.1 80 95
533x210 122 544.6 211.9 12.8 21.3 155.8 85 95
109 539.5 210.7 11.6 18.8 138.6 95 110
101 536.7 210.1 10.9 17.4 129.3 100 115
92 533.1 209.3 10.2 15.6 117.8 110 125
82 528.3 208.7 9.6 13.2 104.4 120 140
457x191 98 467.4 192.8 11.4 19.6 125.3 90 105
89 463.6 192.0 10.6 17.7 113.9 100 115
82 460.2 191.3 9.9 16.0 104.4 105 125
74 457.2 190.5 9.1 14.5 95.0 115 135
67 453.6 189.9 8.5 12.7 85.4 130 150
457x152 82 465.1 153.5 10.7 18.9 104.5 105 120
74 461.3 152.7 9.9 17.0 95.0 115 130
67 457.2 151.9 9.1 15.0 85.4 125 145
60 454.7 152.9 8.0 13.3 75.9 140 160
52 449.8 152.4 7.6 10.9 66.5 160 180
406x178 74 412.8 179.7 9.7 16.0 95.0 105 125
67 409.4 178.8 8.8 14.3 85.5 115 140
60 406.4 177.8 7.8 12.8 76.0 130 155
54 402.6 177.6 7.6 10.9 68.4 145 170
406x140 46 402.3 142.4 6.9 11.2 59.0 160 185
39 397.3 141.8 6.3 8.6 49.4 190 215
356x171 67 364.0 173.2 9.1 15.7 85.4 105 125
57 358.6 172.1 8.0 13.0 72.2 120 145
51 355.6 171.5 7.3 11.5 64.6 135 160
45 352.0 171.0 6.9 9.7 57.0 150 180
356x127 39 352.8 126.0 6.5 10.7 49.4 165 195
33 348.5 125.4 5.9 8.5 41.8 195 225
305x165 54 310.9 166.8 7.7 13.7 68.4 115 140
46 307.1 165.7 6.7 11.8 58.9 135 160
40 303.8 165.1 6.1 10.2 51.5 150 185
305x127 48 312.7 102.4 6.6 10.8 41.8 175 200
42 308.9 101.9 6.1 8.9 36.3 200 230
37 304.8 101.6 5.8 6.8 31.4 225 255
254x146 43 259.6 147.3 7.3 12.7 55.1 120 150
37 256.0 146.4 6.4 10.9 47.5 140 170
31 215.5 146.1 6.1 8.6 40.0 165 200
254x102 28 260.4 102.1 6.4 10.0 36.2 175 200
25 257.0 101.9 6.1 8.4 32.2 190 225
22 254.0 101.6 5.8 6.8 28.4 220 255
203x133 30 206.8 133.8 6.3 9.6 38.0 145 180
25 203.2 133.4 5.8 7.8 32.3 170 210

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Determining protection thickness

The table opposite indicates the effect on A/V for three and four sided schemes Determine A/V factor
from the table or by calculating for other exposure situations, ensuring the correct mass per metre is
used.
Establish the period of fire protection required.
For A/V factors in excess of 260, contact ROCKWOOL for advice on both thicknesses and fixing methods
preferred.

STRUCTURAL STEEL / CONCRETE

Bracing members: These do not generally require protection. If required as an essential element to the
fire resistance, use A/V not greater than 200 m-1.
Where steel beams are fixed to composite steel and concrete decks, the profiled re-entrant void may not
need additional protection if allowances for board thickness or steelwork section factor are made.
See the ASFP Yellow Book 1.7 for current independent guidance.

General notes for systems

Ensure steel is free from grease, dust or loose particles where noggins are to be glued, pins welded or
clips applied
Dry off steelwork where large water droplets are present. Steel damp to the touch is acceptable.
Ensure that all noggins have the correct friction fit. Avoid excessive interference that may cause noggins
to bend.
Fix additional noggins (if required) at beam ends, beam-to-beam joints and large penetrations. For stud
welded pin and clip systems it may be necessary to introduce soldier noggins into webs behind board-to-
board joints to increase stability of the system on steelwork with large web depths.
For glued system options ensure that all noggin-to-beam, noggin-to-board and board-to-board surfaces
are glued, and that the required setting time is allowed.
Remove any excess glue for neatness.
Any localised board shaping to be made at the point of installation should be carried out with a sharp
knife or fine-toothed saw.
Avoid ‘nuisance dust’ from cutting operations lying on boards prior to installation Always use sharp-
edged cutting tools.
The length of all nails used should be at least twice the thickness of the board being fixed.
Pigtail screw length should be twice the thickness of the board being fixed, less 5mm.
All board to board joints must be tightly butted.

Vapour barriers
Glass-reinforced aluminium foil-faced ROCKWOOL BEAMCLAD® A/F provides an excellent vapour seal.
For integrity of the foil, all edges should be taped (with a minimum 75mm wide) plain foil tape. Idenden
T 303 tape is recommended as being suitable. Taped joints also prevent damage to foil edges during
construction.

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Board joints (glued)

No glue is required where boards meet wall or soffit surfaces, except in cases where a temporary fix
to flange faces may be advantageous to the work sequence. Close contact between boards at joints is
always essential.

Painted steel

Painting of structural steelwork is not always essential for corrosion protection. BS 8202: Part 1: 1995
permits the use of unpainted steel which is both interior to the building and in an area which will be
constantly heated.

ROCKWOOL BEAMCLAD® thickness

In selecting ROCKWOOL BEAMCLAD® thicknesses, due consideration must be given to the required
period of fire resistance and the A/V value of the steel sections concerned.

Supply
ROCKWOOL BEAMCLAD® slabs are supplied on pallets, shrink-wrapped in polyethylene. Pigtail screws
are available from ROCKWOOL stockists. Clip fix ROCKWOOL BEAMCLAD® clips are available from
ROCKWOOL in boxes of 1000. ROCKWOOL BEAMCLAD® washers are available from ROCKWOOL in
boxes of 2000. Welded pins and sprung steel non-return washers are available from external suppliers.

References
ROCKWOOL BEAMCLAD® systems are part of the ROCKWOOL FIREPRO® range of fire protection
products ranging from cavity fire stops to blastwall solutions for oil rigs.

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The ROCKWOOL FIREPRO® Solution Finder

STRUCTURAL STEEL / CONCRETE

allows you to quickly and easily find appropriate
solutions to common firestopping applications.

Available online at:

www.rockwool.co.uk/technical-resources/
tools/firepro-solution-finder/
Or download at the App Store

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FIRE PROTECTION
Section 2 – Building services

Building services are an essential part of nearly every building, whether it’s the distribution of cold and
warm air through HVAC systems or providing active measures of fire protection through sprinkler systems
they play an important role in all building types.
As building services often reach out to all parts of a building it is common for these services to pass
through compartment walls and floors. In addition, some building services like smoke extract systems
or sprinkler systems provide active measures of fire protection which often require their own level of fire
resistance.
Ensuring that building services can operate safely and do not contribute towards the spread of fire within
the building are key considerations for any fire safety strategy.
ROCKWOOL® provide a range of products which have been specially designed for fire protecting ductwork
systems, sprinkler and service pipes for periods up to 2 hours on ductwork and 4 hours on service pipes.

Fire Tube FIREPRO®

DuctRock

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Core products

• Fire Duct Systems • Fire Tube

• FIREPRO DuctRock Slab
® ®

BUILDING SERVICES
Useful documents and standards
• ASFP Technical Guidance Document – TGD 18: Code of practice for the installation &
inspection of fire resisting duct systems

• ASFP Blue Book: Fire Resisting Ductwork

• ASFP Grey Book: Fire and smoke resisting dampers

• ASFP: Ensuring best practice for passive fire protection in buildings

• BS 476-24: Fire test on building materials and structures. Method for determination of
the fire resistance of ventilation ducts

• BS EN 1366-1: Fire resistance test for service installations. Ventilation ducts

• BS EN 1366-8: Fire resistance test for service installations. Smoke extraction ducts

• BS EN 1363-1: Fire resistance tests. General requirements

• BS EN 13501-3: Fire classification using test data from resistance to fire tests on products
and elements used in building service installations. Fire ducts and dampers

• BS EN 13501-4: Fire classification using test data from resistance to fire tests on
components of smoke control systems

ASFP ( Association for Specialist Fire Protection) guidance documents can be sourced at www.asfp.org.uk

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FIRE DUCT
SYSTEMS

Advantages
• Specified with confidence

• Quick and easy to install

• Fully certified to BS 476–24 (duct types A and B)

• ½, 1, 1½ and 2hour fire protection for stability,

integrity and insulation

• Choice of fixing options

• Single layer, enabling verification of system

installation

• Space efficient, non-brittle, strong and safe

• Multi-role insulation: fire protection, acoustic and

thermal

• Can be installed on standard DW144/42 ductwork

Description
Fireduct systems
Three products are available in the Fire Fire Duct Slab is a high density
Duct Systems range: insulation slab faced with reinforced
aluminium foil.
• Fire Duct Slab – for rectangular ducts
• Fire Duct Section – for circular ducts Fire Duct Section is a high density
between 60mm and 356mm diameter pre-formed pipe section faced with
reinforced aluminium foil.
• Fire Duct PSM – for circular ducts
greater than 406mm diameter Fire Duct PSM is a high density slab with
factory machined grooves to facilitate
All three Fire Duct products are supplied installation around a circular duct, faced
faced on one side with reinforced with reinforced aluminium foil.
aluminium foil.

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Applications
System options – Rectangular ducts

Welded pin fixing method

Attachment by welded pins allows
extremely rapid installation with slab
joints simply butted together.

Welded pins are generally spaced

at 350mm maximum centres along
the length of the duct and at 500mm
maximum centres across the width and
depth of the duct. Pins are required
on all four sides of vertical ducts, but
may be omitted from the top face of
horizontal ducts, see Figures 5 and 6 on
Figure 1
page 10.
Stud-welded pins, pigtail screws
Longitudinal corner joints fixed with
pigtail screws at 250mm maximum
centres (screw length to be 2 x slab
thickness). Side wall slabs must overlap
top and bottom slabs (as shown). Cross

BUILDING SERVICES
joints bonded with FIREPRO® Glue.

Alternative joint methods

Instead of pigtail screws, longitudinal
joints can be fixed with FIREPRO® Glue
and nails, at 500mm max. centres.

Instead of glue, cross joints can be

protected with centrally positioned,
100mm wide Fire Duct strips fixed
along both edges with pigtail screws at
250mm max. centres.

Mitre-joint fixing methods Figure 2

The use of mitre-joints at slab corners Stud-welded pins, nail and glue
allows installation in situations where
welding may not be practical.

Mitre-joint method
All joints bonded with ROCKWOOL
FIREPRO® Glue. Longitudinal corner
joints secured with nails while
ROCKWOOL FIREPRO® Glue cures.

Figure 3
Mitre joint, nails and glue

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System options – Circular ducts 4

Fire Duct Section 3

Circular steel ducts of between 60mm and
2
356mm diameter may be protected using
Fire Duct Section. Fire Duct Section must
be glued with ROCKWOOL FIREPRO®
Glue at the joints and in the grooves. 1
Steel bands or wires must be fitted
circumferentially to the system at 300mm
nominal centres to hold all joints and
5
grooves tightly closed while the glue cures.

Where required, cover strips and bearer Figure 1

protection pieces are to be cut from Fire Fire Duct Section applied to circular duct
Duct Section (or Fire Duct PSM) of the
appropriate diameter. The foil covering is
to be removed from the area of Fire Duct
Section immediately beneath the cover
4
strips prior to gluing into position and
securing with steel nails or pins. 3

All joints are to be securely taped with 2

75mm wide plain soft aluminium foil
self-adhesive tape (Idenden type T303,
or similar and approved) to maintain a 1
continuous vapour barrier.

The hanger system is as described on

page 66 of our FIREPRO® Brochure and as 5
shown in Figures 1 and 2, with the angle
bearer formed into a circular shape to suit
Figure 2
the diameter of the duct or the Fire Duct
Fire Duct PSM applied to circular duct
Section (depending on whether the hanger
is located inside or outside the protection).

Fire Duct Section is used to protect the

drop rods as described on page 8 of this
brochure. General installation principles are Notes to Figures 1 and 2
as otherwise described in this Product Data 1. Circular steel duct to DW/144
Sheet for Fire Duct Slab. 2. Fire Duct Section/Fire Duct PSM

Fire Duct PSM 3. M10 steel drop rods at 1500mm maximum centres
Circular steel ducts of 406mm and greater 4. Fire Duct Slab/Section – protection to hanger system
diameter may also be protected using Fire 5. 30 x 30 x 3mm minimum steel angle bearer
Duct PSM.

Fire Duct PSM must be glued at the joints

and in the grooves with ROCKWOOL
FIREPRO® Glue. Steel bands or wires must
be fitted circumferentially to the system at
300mm nominal centres to hold all joints
and grooves tightly closed while the glue
cures.

General duct, hanger and installation

details are as described for Fire Duct
Section.

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Performance pH neutrality
ROCKWOOL insulation is chemically compatible
Fire with all types of pipes, ducts, equipment and
fittings. (Guidance is given in BS 5970 regarding
Fire Duct Slab & Fire Duct PSM the treatment of austenitic stainless steel pipework
and fittings). Stone wool insulation is chemically
• Non-combustibility: Class A1 to BS EN 13501-1 inert. A typical aqueous extract of ROCKWOOL
Fire Duct Section insulation is neutral or slightly alkaline (pH 7 to 9.5).

• Non-combustibility: Class A2 to BS EN 13501-1 Standards & approvals

The product has been authorised for use in LUL
Fire resistance surface and sub-surface premises when installed in
Performance summary – Fire Duct Slab, Section accordance with this data sheet – please refer to
and PSM. the LUL Approved Product Register website www.
LU-apr.co.uk for specific details.
Three performance criteria; stability, integrity and
insulation, are required in equal measure for all Fire Duct Systems are third party approved by the
ducts which pass through fire-rated walls or floors. Loss Prevention Council Certification board (LPCB)
for performance and quality and are listed in the
Fire Duct System test data “Red Book” - certificate no. 022f. Certificates can
The Fire Duct products have been tested and be accessed online at
assessed by the Loss Prevention Certification www.rockwool.co.uk or www.redbooklive.com
Board (LPCB) of the BRE in accordance with BS
476 – 24, ‘Fire tests on building materials and ‘Kitchen Extract’ ducts
structures – Methods for determination of the fire These are subject to separate BS 476–24

BUILDING SERVICES
resistance of ventilation ducts’. requirements and are additionally covered for ½
and 1 hour protection periods.
Fire Duct products can be used to provide fire
protection to horizontal, vertical, rectangular,
circular, ventilation and smoke extract steel
ductwork fully in accordance with BS 476 – 24,
ducts ‘Type A’ and ‘Type B’, “Fire outside duct”
and “Fire inside duct”.

The ½, 1, 1½, and 2 hour periods of fire resistance

stated in this manual are for stability, integrity and
insulation in equal measure. For example, the 60
minutes duct constructions shown are certified for
60 minutes stability, 60 minutes integrity and 60
minutes insulation.

Required Hanger Hanger Max. duct size

Fire Fire Duct protection protection for mitre-joint,
resistance thickness Joint Fire Duct hanger glued system
(hours) Duct type (mm) options Slab (mm) section (mm) (mm)
½ HVAC & smoke extract 40 BC 40 17 x 30 1500 x 1500

½ Kitchen extract 40 BC 40 17 x 30 1500 x 1500

1 HVAC & smoke extract 40 BC 40 17 x 40 1000 x 1000

1 Kitchen extract 90 ABC 40 17 x 40 1500 x 1500

1½ HVAC & smoke extract 70 ABC 50 17 x 50 1200 x 1200

2 HVAC & smoke extract 90 ABC 60 17 x 70 1000 x 1000

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Product information Durability

ROCKWOOL stone wool insulation products have
Dimensions been proven in service for over 60 years, in a
Fire Duct Slab wide range of climates and degrees of exposure.
ROCKWOOL insulation will generally perform
• Size: 1200 x 2000mm
effectively for the lifetime of the building, plant or
• Thicknesses: 40, 50, 70 and 90mm* structure.
• Facing: reinforced aluminium foil Biological
ROCKWOOL stone wool is a naturally inert and
Fire Duct Section rot-proof material that does not encourage or
• Diameters: 60 to 356mm support the growth of fungi, moulds or bacteria, or
offer sustenance to insects or vermin.
• Thicknesses: 30, 40 and 90mm*
• Facing: reinforced aluminium foil

Fire Duct PSM

(Made of Fire Duct Slab with factory machined
grooves to suit specific duct diameters)
• Diameters: 406mm and above*
• Thicknesses: 40 and 90mm*
• Facing: reinforced aluminium foil

Fire Duct section for use on hangers

• Nominal OD from 17mm
• Thicknesses: from 30mm*
• Facing: reinforced aluminium foil

*Some thicknesses may be subject to minimum order quantities. Some combinations of diameter and thickness
may not be available or may be subject to a minimum order quantity.

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Installation instructions
Hangers, bearers and flanges
Fire Duct products are approved to provide fire
protection to steel ductwork, wholly constructed
using steel fixings in accordance with current B&ES
specification DW/144 and superseded specification
DW/142. Figure 3
Joint Option A - Rebated protection
Where there are constructional options within
DW/144 and DW/142, these are expanded upon
below. These details are primarily concerned with
duct joint types and the suspension method.

DW/142 flanged cross joint types J3, J4, J5 and J6

are acceptable for use with the Fire Duct System,
without modification.

Fire Duct Slab, Fire Duct Section or Fire Duct PSM may
be installed either outside or inside the hanger system.

Bearers will require additional protection only

when positioned outside the Fire Duct layer.
Joint Option B - Protection using ‘T’ section
Drop rods will normally be protected with Fire Duct
Section or with Fire Duct Slab blocks (see Figure 4).

BUILDING SERVICES
Alternatively, the support steelwork may be sized so
that separate protection is not required. Design of
this ‘unprotected support’ method is independent
of the Fire Duct System.

Duct size (mm)

Up to Up to Up to
1500 x 2000 x 3000 x
Item 1500 2000 3000
Max hanger
1500 1500 1500
centres (mm)
Min drop
M10 M10 M12
rod size Joint Option C - Protection using block cover strip
Min angle
30 x 30 x 3 50 x 50 x 5 50 x 50 x6
bearer (mm)

* DW/144 and DW/142 do not specifically cover ducts larger than

3m wide. Please contact ROCKWOOL for details (contact details on M10 (min.)
back cover). steel drop rod
Binding wire or
nails as convenient
Protection of hangers outside Fire Duct System
Hangers outside the Fire Duct System are protected
by cutting a rebate into a block of Fire Duct Slab,
Fire Duct PSM or Fire Duct Section.

The rebate should be no larger than necessary to

accommodate the bearer. The block should be glued
and pinned in position (see Figure 3, Option A) or
secured using pigtail screws.
Fire Duct Hangar
Slab section
Other J joints
If type J1 or J2 cross joints are fitted, then
the joints must be upgraded to at least the J3 Figure 4
specification. This can be done by adding steel Isometric view of drop rod protection options
fixing bolts and fastenings in line with the J3 joint
type. Also a minimum S3 stiffener should be fitted
to the duct adjacent to the cross joint. This will
upgrade the cross-sectional stiffness of the duct.

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350
Top panel
350 (no pins necessary on
horizontal ducts)
350
ROCKWOOL FIREPRO® Glue
ROCKWOOL FIREPRO® Glue has a pH
value of 11. It is provided in 17 kg drums
and should always be stirred before use.
Soffit panel
Side panel
>600mm
Where required, 1–1.5mm of glue should >1000mm
be applied to each Fire Duct joint. The
glue is generally applied by spatula or
trowel. 350
50 350
Where present, any foil facing must
50
be removed from surfaces prior to the
Figure 5
application of FIREPRO® Glue. Take care
Steel pin arrangement where side panel does not
to remove any FIREPRO® Glue from all
exceed 1000mm and soffit panel does not exceed
aluminum foil surfaces with a damp cloth.
600mm
Nails (for use only with mitre-joint ‘glued’
systems)
350
The nail length is to be 2 x board thickness
350 Top panel
(see Figure 7 for positions) 350 (no pins necessary on
horizontal ducts)
350
Pigtail screws 350
Pigtail screws are to be used at all corner
joints where FIREPRO® Glue is not used, Side panel
and to secure cross joint cover strips. >1000mm
Soffit panel
Pigtail screws are to be positioned at >600mm
500
250mm maximum centres, and the screw
length is to be 2 x slab thickness. 500

For horizontal ducts, pigtail screws must be 500

50 350
inserted horizontally. 350
500 350
350
500 350
500 50

Figure 6
Steel pin arrangement where side panel is greater than
1000mm or soffit panel is greater than 600mm

Optional edge protection Optical edge protection

Light gauge metal angles may be glued

Nails
in position to provide optional edge
protection. The metal angles must be
de-greased. Small pins may be required
to hold the angle to the underside of the
duct.
500
Vapour barrier
Where a vapour barrier is required, all
exposed Fire Duct edges and penetrations
through the foil must be sealed using
aluminium foil tape. 500

1800mm
board length Glue
100
Figure 7
Rectangular ducts – 45° mitre joint system, showing
installation sequence

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Wall penetrations, elbows, 2 and 3-sided

applications and access hatches

Wall and floor penetrations

Support to duct sides is required at all
penetrations for stability purposes. This
support can be provided by:
• A 30 x 30 x 2mm mild steel angle frame
fixed to the duct at the penetration
mid-point. Steel rivets should be used at
300mm maximum centres (Figure 8),
• Locating the duct joint at the penetration Figure 8
mid-point. Steel angle frame support to duct at penetration mid
point
In all cases, low density ROCKWOOL
stone wool, typically RWA45, is packed
tightly into the void between the Fire Duct
product and the wall opening.

120mm wide blocks of Fire Duct are glued

(or secured with pigtail screws) to the duct
insulation and to the wall on both sides of
the penetration.

BUILDING SERVICES
All Fire Duct to wall joints are glued.
Aluminium foil is located in Fire Duct joints
at wall penetrations (as shown).

Proprietarypenetration seals
Where proprietary penetration seals are
used, compatibility with the separating
element, duct construction and Fire
Duct System must be demonstrated by
independent test or assessment. Figure 9
Typical elbow detail for rectangular ducts
Elbows (rectangular ducts)
Small elbows may simply be boxed or
‘squared off’. Larger elbows may need to
be protected by cutting fan shaped pieces,
generally in accordance with the illustration
(Figure 9).

2 and 3-sided applications

(rectangular ducts)
The use of Fire Duct products incorpo-
rating welded pins is recommended for 2
and 3-sided applications.

The method illustrated (Figure 10) for

three-sided applications, may also be used
for two-sided applications where the duct
is securely braced in the corner of a room. Figure 10
Three sided protection for rectangular ducts, using
welded pin fixing method

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Access hatches (rectangular ducts)

Opening in Fire Duct Slab to
Steel access hatches which are con- accommodate DW144 close access 1.5 x thickness
structed and fitted in accordance with panel (or similar) max opening 900 x (min)
900 mm guides (guide required on
DW/144 may be protected with Fire Duct third side for openings larger than 500
Slab (Figure 11). x500 mm)

The Fire Duct cover may be fitted in any

face of the duct. However, if the sliding
cover is not in the horizontal plane the Fire Duct Slab
guides must be positioned so as to prevent thickness as
movement of the cover due to weight, appropriate to
fire protection 1.5 x thickness
vibration etc. required, tight (min) thickness
fit in guides
The sliding cover must be a tight fit in the
guides. No part of the arrangement may
be within 50mm of edges or joints within 1.5 x thickness
the main duct protection layer of Fire Duct (min)
Slab.

All Fire Duct Slab joints (excluding sliding

joints) are to be glued and pinned as Light gauge steel formed
1.3 x into channel ‘runners’
previously detailed. thickness (thickness typically 0.5 mm,
(min) 1.0mm max)
Access hatches (circular ducts) thickness
Details of access hatches for circular ducts
are available on request.

Handling Figure 11
The Fire Duct range of products is light, Removable cover panel for steel access hatch
easy to handle and simple to fix. The
products can be cut and shaped using
knives, saws, etc.

Ancillaries

Welded steel pins

Welded pins are generally spaced at
350mm maximum centres along the length
of the duct and at 500mm maximum
centres across the width and depth of the
duct. Pins are required on all four sides
of vertical ducts, but may be omitted
from the top face of horizontal ducts (see
Figures 5 and 6).

Details of alternative mechanically fixed

pins are available from ROCKWOOL on
request.

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Criteria for preparation of ductwork prior to insulation

Fire Duct products are certified to provide fire protection to ductwork conforming to Construction Details 1 to 12 in
the table below and to the requirements of B&ES Specification DW/144. The table may be used as a check list for
on-site verification of ductwork construction.
Within
Construction detail Requirement Details of modification where needed specification
1. Duct sheeting Rigid steel (zinc-coated, alu-zinc coated, black
or stainless)
2. Sheet 0.8mm or greater. See DW/144 for ducts larger
thickness than 1500mm
3a. Welded pin Up to 1500 x 1500 mm: no additional system
fixing methods modifications
Up to 2000 x 2000mm: increase angle bearer
size to 50 x 50 x 5mm min
Up to 3000 x 3000mm: increase angle bearer
size to 50 x 50 x 6mm min
Increase drop rod diameter to M12 min
Up to 4000 x 4000mm: 50 x 50 x 6mm min.
bearer. M12 min. drop rod
Incorporate additional drop rod mid-width
through duct and bearer*
Weld (or fasten with with nuts and large washers)
M15 min. strengthening rod. at mid-width of each
flanged joint and penetration point to maintain
cross section
Seal all holes with mastic
Above 4000 x 4000mm: 50 x 50 x 6mm bearer. M12
min. drop rod
Incorporate additional drop rods through duct and
bearer to ensure 1500mm max. spacing along bearer*.
Weld (or fas- ten with nuts and large washers) M15
min. strengthening rod at each flanged joint and
penetration point to ensure 1500mm max. spacing
along joint. Seal all holes with mastic.

BUILDING SERVICES
*Additional drop rods to pass through duct and
bearer. Rods to support bearer. ‘Top’ of duct to be
held in position with steel nuts and large steel washers
3b. Mitre-joint If duct dimensions exceed those shown, use welded
fixing methods steel pins as per Fire Duct system manual (see item 3a)
½ hr HVAC & 1500mm x 1500mm
smoke extract
½ hr kitchen extract 1500mm x 1500mm
1 hr HVAC & 1500mm x 1500mm
smoke extract
1 hr kitchen extract 1500mm x 1500mm
1½ hr HVAC & 1200mm x 1200mm
smoke extract
2 hr HVAC & 1000mm x 1000mm
smoke extract
4. Flanged cross Type J3, J4, J5 or J6 to HVAC specification Strengthen joints (contact ROCKWOOL)
joint DW/142 and DW/144
5. Joint seal May be included or omitted
6. Constructional Steel
fixings
7. Bearers 30 x 30 x 3mm (min.) steel angle. See item 3a
for ducts larger than 1500mm
8. Drop rods
9. Drop rod anchors
Fixed through steel Steel frame to be independently fire rated Fire protect steelwork
suspension frame
Fixed into Anchors to have confirmed fire rating. M10 If fire rating is un-confirmed and anchor is all-steel, ie without
concrete (min.) mild steel. See item 3a for ducts larger plastic or chemical components; affix 300mm x 300mm collar of
than 2000mm unfaced Fire Duct Slab to soffit with FIRE- PRO® Glue, keeping
anchor central. Collar thickness to equal duct encasement layer.
Optional self-tapping screws may be used to support collar. Glue
adjacent Fire Duct drop rod protection to collar.
10. Spacing of
suspension system
10a. Horizontal ducts 1500mm max. centres

10b. Vertical ducts: 1500mm max. centres Install additional supports

2 or 3 sided protection
10c. Vertical ducts: 4 Support at every floor (4 m max. centres)
sided protection
11. Stiffening of Duct flange or 30 x 30 x 3mm steel angle frame Install steel angle frame
duct at penetration fixed with steel fixings at 300mm max. centres. To
detail be positioned within the width of the penetration.
See item 3a for ducts larger than 3000mm.
12. Compartment Fire rated masonry, concrete, brick, block,
wall plasterboard or other fire rated construction

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Specification clauses 5. All cross joints are to be covered with centrally

positioned 100mm wide strips of Fire Duct Slab
Typical specification clauses for rectangular ducts of the same thickness as the insulation. The
to be read in conjunction with system options on cover strips are to be fixed along both edges
pages 4 and 5 using pigtail screws at 250mm max. centres.
* Insert Fire Duct Slab insulation thickness required.
Welded pin fixing method † Insert appropriate overall diameter.
1. All ductwork is to be insulated with ..........*mm
ROCKWOOL Fire Duct Slab, having a factory Mitre-joint fixing method
applied reinforced aluminium foil to one face 1. All ductwork is to be insulated with ..........*mm
and complying with Building Regulations Class Fire Duct Slab, having a factory applied
‘O’ requirements. reinforced aluminium foil to one face and
2. The Fire Duct Slab is to be fixed to the duct complying with Building Regulations Class ‘O’
using 2.5mm diameter welded steel pins and requirements.
38mm spring steel washers in accordance with 2. The Fire Duct joints at ductwork corners are to
the ROCKWOOL Product Data Sheet ‘Fire Duct be 45° mitred. Square butt joints to be used
systems’. elsewhere.
3. The foil facing is to be removed from any 3. The foil facing is to be removed from any
surfaces to which FIREPRO® Glue is to be surfaces to which FIREPRO® Glue is to be
applied. applied.
4. All corner joints are to be fixed with pigtail 4. All joints are to be filled with FIREPRO® Glue and
screws at 250mm maximum centres. Screw held tightly closed.
length is to be 2 x slab thickness.
5. All mitred joints are to be held tightly closed
5. All cross joints are to be filled with FIREPRO® with nails (length = approx. 2 x Fire Duct Slab
Glue and held tightly closed. thickness) until the glue has fully cured. 2 nails
6. Drop rods and bearers are to be at 1500mm juxtaposed at 90° are to be located at 3 points
maximum centres and to be M10 steel rod per 1200mm length of mitred joint and at 5
and 30 x 30 x 3mm steel angle respectively. points per 2000mm length.
Ductwork is to be generally in accordance with 6. Drop rods and bearers are to be at 1500mm
B&ES Specification DW/144. maximum centres and to be M10 steel rod and
7. Drop rods and exposed bearers are to be 30 x 30 x 3mm steel angle respectively. Ductwork
insulated with ..........*mm Fire Duct Slab or is to be generally in accordance with B&ES
..........† x ..........*mm Fire Duct Section, as Specification DW/144.
appropriate. Rebates or cover pieces are to 7. All drop rods and exposed bearers are to be
be used at duct flange and bearer locations insulated with ..........*mm Fire Duct Slab or
according to site conditions and subject to ..........† x ..........*mm Fire Duct Section, as
ROCKWOOL approval. appropriate. Rebates or cover pieces are to
8. Where a vapour barrier is required, all exposed be used at duct flange and bearer locations
Fire Duct edges and penetrations through the according to site conditions and subject to
foil should be sealed using soft self-adhesive ROCKWOOL approval.
aluminium foil tape (Idenden type T303, or 8. Where a vapour barrier is required, all exposed
similar and approved). Fire Duct edges and penetrations through the
foil should be sealed using soft self- adhesive
Alternative longitudinal joints aluminium foil tape.
Delete clauses 3 and 5 in Method 1 above, and
insert new clause 5: NBS specifications
5. All joints are to be filled with ROCKWOOL ROCKWOOL Fire Duct Systems are associated with
FIREPRO® Glue and held tightly closed. Use the following NBS clauses:
nails at 500mm centres at corner joints to aid U90 General ventilation - domestic
this process.
• 490 Site applied insulation to ductwork
Alternative cross joints
Delete clauses 3 and 5 in Method 1 above, and Y30 Mechanical thermal insulation
insert new clause 5:
• 340 Mineral fibre slabs insulation

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DUCTROCK®
SLAB

Advantages
• EI 120 mins on ventilation and smoke

BUILDING SERVICES
• Tested on both vertical and horizontal ducts

• Wide ranging scope for many duct types

• High quality black foil finish

• Patented horizontal penetration detail

Description
FIREPRO® DuctRock® Slab is manufactured with high density, non-combustible stone
wool insulation and finished with a high emissivity black foil facing. Available in
three thicknesses DuctRock® Slab is easy to handle, simple to install and capable of
achieving fire resistance of up to EI 120.

FIREPRO® Glue and a high performance Black Aluminium Foil Tape are also readily
available from ROCKWOOL for sealing all board joints.

Applications
DuctRock® Slab has been designed for use with rectangular and square steel ductwork
systems and has been fire tested in conjunction with the following duct types shown in
table 1.

Table 1

Ventilation duct: Ventilation duct: Smoke extract

Type A Type B duct: Type C
Horizontal Vertical Horizontal Vertical

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Performance
Fire performance
FIREPRO® DuctRock® Slab can achieve fire resistance ratings; Integrity (E) and Insulation (I) of EI 30 to EI
120 with only 3 thicknesses. Table 2 provides a summary of fire performance.

Table 2

FIREPRO® Ventilation duct: Type A Ventilation duct: Type B Smoke Ducts with a
DuctRock® extract duct: combustible
Slab (mm) Horizontal Vertical Horizontal Vertical Type C lining
*60 EI 60 EI 60 EI 60 EI 60 EI 60 N/A
80 EI 90 EI 90 EI 90 EI 90 EI 90 N/A
90 EI 120 EI 120 EI 120 EI 120 EI 120 **EI 60
*Use 60mm FIREPRO DuctRock Slab for EI 30 fire ratings
® ®

**DuctRock slab has been tested in accordance with the criteria set out in section 11.2.2 of BS EN 1366-
1:2014 (Ducts with combustible lining) where additional thermocouples were positioned within the duct
to record the average and maximum temperature rise. Insulation failure was defined in accordance with
EN 1363-1.

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Technical information
Standards and approvals
DuctRock® Slab has been tested in accordance with BS EN 1366: Part 1 for ventilation ducts and also BS
EN 1366: Part 8 for smoke extraction ducts achieving up to EI 120 minutes.

DuctRock® Slab has been classified in accordance with EN 13501-3:2005 +A1: 2009.

Fire Resistance Classification: up to EI 120 (ve, ho, i ↔ o) S

DuctRock® has been classified in accordance with EN 13501-4:2016.

Fire Resistance Classification: up to EI 120 multi (ho/ve) S 500

Property Description
Length 1200mm
Width 1000mm
Thickness 60, 80 & 90mm
Facing Black Aluminium Foil
Fire resistance Up to EI 120

pH neutrality

BUILDING SERVICES
ROCKWOOL insulation is chemically compatible with all types of pipes, ducts, equipment and fittings.
(Guidance is given in BS 5970 regarding the treatment of austenitic stainless-steel pipework and fittings).
Stone wool insulation is chemically inert. A typical aqueous extract of ROCKWOOL insulation is neutral or
slightly alkaline (pH 7 to 9.5).

Durability
ROCKWOOL stone wool insulation products have been proven in service for over 60 years, in a wide
range of climates and degrees of exposure. ROCKWOOL insulation will generally perform effectively for
the lifetime of the building, plant or structure.

Biological
ROCKWOOL stone wool is a naturally inert and rot-proof material that does not encourage or support
the growth of fungi, moulds or bacteria, or offer sustenance to insects or vermin.

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Installation
Fire performance
FIREPRO® Ductrock® Slab can be rapidly installed onto rectangular and square steel ductwork using a
combination of Ø2.7 - Ø3.0mm stud welded pins, Ø30mm steel washers and ROCKWOOL FIREPRO®
Glue. All board abutments and cross joints must be covered with ROCKWOOL black aluminium foil tape.

DuctRock Slab thickness (mm) Stud welded pin length (mm)

60 62mm
80 82mm
90 92mm

FIREPRO® DuctRock® is easily cut with a hand saw or alternatively a circular/table saw. The top and
bottom slabs should be cut 10mm wider than the width of the duct to ensure a tight cross joint with the
side slabs. The side slabs should be cut to the height of the duct (H) + 2 x the insulation thickness as
shown in Figure 1.

H+2xD

Figure 1
B+10

Top slab
When installed within horizontal applications the top boards do not require any
stud welded pins and is simply positioned onto the duct with all board joints
bonded with FIREPRO® Glue. Board joints must be covered using ROCKWOOL
black foil tape.

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Side wall slabs

The side wall slabs are installed using stud welded pins with 350mm maximum centres along the length
of the duct and 400m centres across the depth as shown in Figure 2.

≤50
≤350
≤50 ≤50
≤350

≤400

≤50

BUILDING SERVICES
Figure 2

Side wall slabs must overlap the top and bottom boards as shown in Figures 3 & 4. All cross joints must
be bonded with ROCKWOOL FIREPRO® Glue.

Board edges must

be covered with
ROCKWOOL Black
Foil Tape

Figure 3 Figure 4
Cross joint horizontal duct Cross joint vertical duct

Note: To ensure that there is a strong bond between the welded pin and the duct, always ensure
that the welded pin is sufficiently isolated from for the foil surface of the insulation during welding.

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Base slab
Install the base slabs with stud welded pins at a maximum of 350mm centres along the length of the duct
and 300mm centres across the width of horizontal ducts and 450mm across the width of vertical ducts as
shown as shown in Figures 5 and 6.
≤50 ≤450
≤50 ≤450 ≤50

≤400

≤50 ≤350

≤350

≤300 ≤50
≤350
≤50 ≤50

≤350

≤350

Figure 5 Figure 6
Horizontal duct Vertical duct

Detailing around flanges and drop rod hangers

Where the DuctRock® Slab bypasses a flange, drop rod hanger or both, cut a notch into the insulation
as shown in Figure 7a-c. The insulation can easily be cut with a sharp knife or hand saw. All board joints
must be bonded with FIREPRO® Glue.

≤30 ≤30

≤100

Glue the joints with FIREPRO® Glue

Figure 7a Figure 7b

≤30

Figure 7c

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Dry wall penetration

In order to maintain fire performance, provide stability and minimise noise transfer,
ROCKWOOL have developed a patented solution for installing DuctRock® Slab at
the point where the duct penetrates a dry wall system.

BUILDING SERVICES
Figure 8
ROCKWOOL patented dry wall penetration detail

Installation procedure - Dry wall penetration

1. A joint in the DuctRock® Slab must be accommodated at the centre point of the aperture, as shown in
Figure 10.
2. Fill the remaining annular space between the DuctRock® Slab and supporting structure of the dry wall
system with ROCKWOOL RWA45 as shown in Figure 9.
3. To stiffen the duct around the penetration a 1.5mm thick steel u-profile (60 x 25 mm) must be fitted
approx. 20mm from the wall, to both the vertical and horizontal sides of the duct (both sides of the
aperture) the length of the profile can be determined using the following formula:

Duct width / height + (2x insulation thickness) – 50mm

Examples shown in table below:

Duct size (mm) Insulation thickness (mm) U-profile length (mm)
Horizontal Vertical
1500 (L) x 1000 (W) x 500 (H) 90 1130 630
1500 (L) x 1000 (W) x 250 (H) 90 1130 380

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4. Before applying the u-profile to the DuctRock® Slab slits must be cut into the insulation to allow the
profile sides to penetrate the insulation (Figure 10). The u-profile can be attached to the ductwork
using 100mm self-tapping screws. 4No to the top and bottom slabs and 2No to the vertical slabs.
5. Once the u-profiles have been applied an insulated collar must be installed around the perimeter of the
aperture. The collar can be simply cut from the DuctRock® Slab. Fix the collars in place with FIREPRO®
Glue as shown in Figure 9. Use nails to temporarily hold the collars in place whilst the glue cures.
6. ROCKWOOL Black foil tape can be used to cover any exposed edges of the collars.

Annular space filled with

ROCKWOOL RWA45

Steel u-profile fixed 20mm from

the wall

60mm x 100mm DuctRock collars

bonded to the substrate with
FIREPRO® Glue

Figure 9

DuctRock joint at the centre of the

aperture bonded with FIREPRO® Glue

100mm self tapping screws

25mm (depth) slits cut into the

DuctRock slab to accommodate the
legs of the u-profile

Annular space filled with

ROCKWOOL RWA45

Figure 10

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Installation procedure - Floor penetration

1. Maintain a 30mm gap between the ductwork and floor structure. Fill the gap between the duct and the
floor structure with a ROCKWOOL Slab e.g. ROCKWOOL RWA45 as shown in Figure 11a. The flexible
slab can be sealed within the void using FIREPRO® Glue.
2. Secure the duct to the floor structure using 4 no. 50 x 50 x 45 x 2.5mm galvanised steel angles to both
sides of the aperture. The angles can be fixed using 2No 3.2 x 25mm self-tapping screws. Alternatively,
the duct can be secured with a 40 x 40 x 3mm L profile as shown in Figure 11b. The length of the L
profile should be equal to the width of the duct and installed to both sides (duct width).
3. Apply a DuctRock® collar to the perimeter of the aperture and on both sides as shown in Figure 11a.
The collars can be fixed using FIREPRO® Glue and temporarily held in place with nails until the glue cures.

BUILDING SERVICES
60mm x 100mm DuctRock collars
bonded with FIREPRO® Glue

Seal the ROCKWOOL Slab within the

aperture space with FIREPRO® Glue

Secure the duct to the substrate

using 4 no. 50 x 50 x 45 x 2.5mm
galvanised steel angles fixed with
3.2. x 25mm self tapping screws

Figure 11a

40 x 40 x 3mm galvanised steel

L-profile fixed with 3.2 x 15mm self
tapping screws to the duct and 7.5 x
62mm screws to the floor.

Figure 11b

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Elbows
Elbows can be protected by cutting the DuctRock® Slab into fan shaped segments as shown in Figure
12a. Alternatively v-shaped slits can be cut into the back of the DuctRock Slab allowing it to wrap around
the elbow as shown in Figure 12b. Fill the v-shaped channels with FIREPRO® Glue before applying to the
duct and use nails to temporarily hold the insulation in place whilst the glue cures.

Figure 12a Figure 12b

Access hatches
DuctRock® Slab can be cut and positioned within a steel frame to form a removable cover in the location
of the steel access hatch. The insulated cover can be attached to the duct using 4N° M8 threaded rods
(Figure 13a) ensuring the rods are secured on both sides of the duct. The cover is then fixed to the rods using steel
M8 nuts and washers. The thickness of insulation should be appropriate to the fire resistance required.

Steel frame
for housing
4 x M8 the removable
threaded rods insulated cover.
secured to both
sides of the
duct. Removable cover
secured to the
threaded rods
with M8 nuts and
washers.

Figure 13a Figure 13b

Ancilliaries
• FIREPRO® Glue and ROCKWOOL Black Foil Tape is available from ROCKWOOL Stockists
• Stud welded pins and self-tapping screws are available through CEVaC Limited, Tel: +44 (0) 1403 786503

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Specification clauses
Typical specification clauses for rectangular and square ducts to be read in conjunction with the
installation guidelines provided within this datasheet.
• All ductwork is to be insulated with……* mm ROCKWOOL FIREPRO® DuctRock® Slab, having a factory
applied reinforced black aluminium foil to one face and tested in accordance with BS EN 1366: Part 1
and/or BS EN 1366:Part 8.
• DuctRock® Slab is to be fixed to the duct using 2.7 - 3.0 mm diameter welded steel pins and 30 mm
spring steel washers in accordance with the ROCKWOOL Product Data Sheet ‘FIREPRO® DuctRock®’.
• All joints are to be filled with FIREPRO® Glue and held tightly closed.
• Installed to steel ductwork which complies with the following specification criteria:
▪▪ Steel duct dimensions up to 1000x1250 (height x width) and 1500mm in length
▪▪ With leakage class B in accordance with EN 1507. Further information on leakage classes can also be found in
DW/144: Specification for Sheet Metal Ductwork low, medium and high pressure/velocity air systems.
▪▪ With an under-pressure or over-pressure up to 500Pa
▪▪ Steel flanges to be spot welded to the duct:
• Ventilation Duct - 20mm flange
• Smoke Extract Duct - 30mm flange
▪▪ Flanges to be held together with either a 20mm flange joint profile (duct types A & B) or 30mm

BUILDING SERVICES
flange joint profile (duct type C). All flange joints to be sealed with sealing grease.
▪▪ With stiffeners as follows:
• EI 120 – Ventilation Duct: 1 x Ø 15mm steel pipe in each duct segment
• EI 120 – Smoke Extract Duct: 2 x Ø 15mm steel pipe in each duct segment
▪▪ Sealed with and appropriate duct sealant and 5 x 15mm EPDM tape

• The duct suspension system complies with the following specification criteria:
▪▪ Horizontal ducts:

Max distance from

Fire Max tensile stress of Max shearing stress of suspension device to
resistance suspension device screws duct joint
EI 30 9 N/mm² 15 N/mm² 150mm

EI 60 9 N/mm² 15 N/mm² 150mm

EI 90 6 N/mm² 10 N/mm² 150mm

EI 120 6 N/mm² 10 N/mm² 150mm

EI 120 (Smoke Extract) 6 N/mm² 10 N/mm² 150mm

• With distance between suspension devices not exceeding 1500mm

• The lateral distance between the outer vertical surface of the steel duct and the centre line of the
suspension rod shall not exceed 50mm
▪▪ Vertical ducts:
• With distance between supporting structures not exceeding 5m

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• Any duct penetrations comply with the following specification criteria:

▪▪ Horizontal:
• Penetrating in rigid wall constructions or flexible walls with a minimum thickness of:
▪▪ EI30 – 70mm
▪▪ EI 60 – 95mm
▪▪ EI 90 – 95mm
▪▪ EI 120 – 130mm
▪▪ And with a fire resistance equal to or greater than the tested DuctRock® slab thickness.
• For horizontal penetrations, the gap between the DuctRock® Slab and supporting structure will not
exceed 20mm.
• For horizontal penetrations U-profiles 1.5mm thick, with dimensions 60 x 25mm must be installed
approximately 20mm from the wall and on both sides of the wall. The legs of the u-profiles are
lowered into slits cut into DuctRock®Slab and fixed to the duct by means of
▪▪ Ø 4.8mm x 100mm for EI 30 & EI 120
self-tapping screws; 4 on the top and bottom profiles and 2 on the vertical profiles.
▪▪ Vertical
• Penetrating rigid floor constructions with a minimum thickness of:
▪▪ EI 30 – 100mm
▪▪ EI 60 – 100mm
▪▪ EI 90 – 150mm
▪▪ EI 120 – 150mm
▪▪ And with a fire resistance equal to or greater than the tested DuctRock® slab thickness.
• For vertical penetrations the duct is to be stabilised using 4 no. ‘L’ galvanised steel angles of 50
x 50 x 45 x 2.5mm or a 40 x 40 x 3mm L profile which are fixed to the vertical steel duct and the
supporting structure on both sides of the floor.

NBS specification clauses

FIREPRO® DuctRock® Slab is associated with the following NBS specification clauses:

U90 General Ventilation – Domestic

• 490: Site applied insulation to ductwork

Y30 Mechanical Thermal Insulation

• 340: Mineral fibre slab insulation

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FIREPRO®
FIRE TUBE

Advantages
• Available in a range of wall thicknesses to
accommodate specific fail temperatures

BUILDING SERVICES
• Manufactured to accommodate pipes and CHS sizes
up to 610mm Ø

• Up to 4 hours fire resistance

• Excellent thermal and acoustic insulation

• A1 Non-combustible

• Water repellent

Description Applications
FIREPRO® Fire Tube is a preformed Fire Tube has been designed to provide
cylindrical section which is manufactured fire protection of up to 4 hours and is
using high density ROCKWOOL stone suitable for use with:
wool. Fire Tube is available in both plain
• Structural steel
and foil faced options.
• Circular Hollow Sections (CHS)
Fire Tube is available to suit common
steel structural column and pipe • Solid bars
diameters in the range between • Sprinkler pipes
21mm - 610mm and is supplied in
lengths of 1000mm. • Process pipework

Standard wall thicknesses*: 25, 40, 50,

60 and 70mm (excludes 610 diameter

* Other wall thicknesses may be available subject to quantity or can be accommodated on site by dual
layering one tube over another.

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Performance
Fire performance
Fire report CC 276856A details the expected fire resistance performance relating to critical steel
temperatures of 50, 100, 150, 200, 250, 300, 350, 400 and 550°C for periods of up to 4 hours.

The required wall thickness of Fire Tube to provide a particular fire resistance for a specified period
depends on the diameter, wall thickness and critical (fail) temperature of the steel column or pipe.
However, in the case of pipes, the critical temperature is likely to depend on its contents.

Structural steel fire protection

The section factors A/V (Hp/A) for standard structural steel sections can be found in the ASFP Yellow
Book or can be calculated for each element by dividing the perimeter (circumference) exposed to fire (A)
by the cross sectional area (V). For circular sections (including pipes), the following, simplified formulae
can be used to calculate the A/V section factors:-
• Solid sections: A/V = 4 / OD
• Hollow sections: A/V = OD / (thk (OD - thk))
• Where OD = outside diameter in m
• Where thk = wall thickness in m

Worked example for hollow section

• Outside diameter: 219.1mm (0.2191m)
• Wall thickness: 8.0mm (0.008m)
• Circumference (A): 0.6884m
• Cross sectional area (V): 0.00531m2
• Section factor (A/V): 130m-1

Tables 1 and 2 provide the wall thickness of Fire Tube necessary to restrict the core design temperature
of circular steel elements (based on their limiting section factors) to 400°C and 550°C respectively,
during exposure to cellulosic fire test. The design temperature is defined as the mean temperature at
which a beam or column is assumed to be capable of supporting a specified load. Similar tables for
critical temperatures of 50°C, 100°C, 150°C, 200°C, 250°C, 300°C and 350°C are also available from the
ROCKWOOL Technical Solutions Team.

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Table 1
Critical steel temp 400°C (for offshore and marine)

Fire Tube wall Maximum A/V section factors for 550°C critical temperature – fire resistance (mins)
thickness (mm) 30 60 90 120 180 240
25 250 91 37 24 X X
30 250 130 48 29 X X
40 250 250 74 43 23 X
50 250 250 111 59 31 21
60 250 250 165 79 39 26
70 250 250 250 105 48 31
75 250 250 250 120 53 34
80 250 250 250 137 58 37
90 250 250 250 182 70 43
100 250 250 250 246 84 50

Table 2
Critical steel temp 550°C (for load-bearing structural building frameworks)

BUILDING SERVICES
Fire Tube wall Maximum A/V section factors for 550°C critical temperature – fire resistance (mins)
thickness (mm) 30 60 90 120 180 240
25 250 250 83 44 23 X
30 250 250 111 56 28 19
40 250 250 193 84 40 26
50 250 250 250 121 53 34
60 250 250 250 172 68 42
70 250 250 250 245 85 52
75 250 250 250 250 95 57
80 250 250 250 250 106 62
90 250 250 250 250 129 73
100 250 250 250 250 158 86

Pipework fire protection

The critical failure temperature of a pipe will depend on the material it is made of, or its contents e.g.
water or oil. Table 3 provides the minimum required wall thickness of Fire Tube for a variety of critical
failure temperatures to provide 60 minutes fire resistance to a 219.1mm OD steel pipe with an 8mm wall
thickness - Section factor (A/V) of 130m-1.

Table 3
Critical steel temp 550°C (for load-bearing structural building frameworks)

Critical temperature of pipe material or contents Wall thickness of Fire Tube (mm)
100°C 100
150°C 75
200°C 60
250°C 50
300°C 50
350°C 40
400°C 30
550°C 25

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Technical information
Standards and approvals
Fire Tube conforms to BS 3958: Part 4, ‘Bonded preformed mineral wool pipe sections’.

Full-scale independent test data has been verified and assessed by BRE Global in Fire report number: CC
276856A. The fire performance of Fire Tube has been reviewed by the Fire Test Study Group for inclusion
in the ASFP Yellow Book, endorsed by the Steel Construction Institute.

This product has been authorised for use in LUL surface and sub-surface premises when installed in
accordance with this datasheet - please refer to the LUL Approved Product Register website www.LU-apr.
co.uk for specific details.

Product information

Property Description
Length 1000mm
Internal diameter range 21 – 610mm
Thickness range 25 – 100mm
Reaction to fire classification Euroclass A1
Fire resistance Up to 4 hours

Installation
FIREPRO® Fire Tube is light and easy to cut to shape using a saw or a sharp knife.

Abutted sectional joints/ tube ends of the Fire Tube (including the partially split ‘hinge’ and the tube
ends) are to be applied with FIREPRO® Glue prior to application. All joints should be held firmly together
with temporary bands of steel wire, jubilee clips or plastic cable ties at 200mm centres until adhesive
within joints and between Tube ends has fully cured.

If installed outdoors, Fire Tube must be protected from the weather. Prior to use, Fire Tube should be
stored indoors or protected by a weather proof covering

Specification clauses
FIREPRO® Fire Tube is associated with the following NBS clauses:

P12 Fire stopping systems

• 375 Pipe collar: Insulated wrap

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ROCKWOOL firestopping principles

1. ROCKWOOL will not support mixing fire protection of differing
manufacturers systems/products of any type in line with ASFP
recommendations, unless proven by fire testing.
2. ROCKWOOL products should be installed in accordance with the
relevant product data sheet and within the field of application identified
on the standard details. For applications that fall outside the parameters
identified in the standard details or data sheets please contact
ROCKWOOL for further guidance.
3. Engineering Judgements are an appraisal of the likely performance of
the installed ROCKWOOL products in that application when subjected
to a fire resistance test. It is offered in lieu of direct formal testing and is
based upon ROCKWOOL’s experience of product performance during
fire resistance testing. For this reason, before installation engineering
judgements used on site should be reviewed and accepted by Building
Control and / or the scheme Fire Office or the overseeing body for the

BUILDING SERVICES
project.
4. All penetrations within the dry lining system shall be framed and lined. a
pattress fit option with ROCKWOOL Batts is available, but please check
for its suitablility.
5. Design of the penetration and its fire stopping should consider and
correspond to the Integrity and Insulation requirements of the host wall
or floor, unless leniency on the insulation rating is provided by the Fire
Officer or overseeing body via a derogation.
6. Services of different types can pass through the same penetration, with
the exception of ventilation (ducts and dampers) which should pass
through exclusively through its own penetration, as per the EN test
guidance.
7. Fire dampers and smoke dampers are to be independently supported
from the soffit, therefore care should be taken where other services
pass above the ventilation penetrations. Please refer to the damper
manufacturers details and specification.
8. Support for services passing through walls should be within 500mm on
each side. Services passing through floors should be supported at each
level, as per industry and ASFP Guidance.
9. With reference to penetration spacings, please refer to the ROCKWOOL
Spacing Guidelines Document

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Sustainability Environment
As an environmentally conscious Made from a renewable and plentiful
company, ROCKWOOL promotes naturally occurring resource,
the sustainable production and use ROCKWOOL insulation saves fuel costs
of insulation and is committed to a and energy in use and relies on trapped
continuous process of environmental air for its thermal properties.
improvement.
ROCKWOOL insulation does not
All ROCKWOOL products provide contain (and has never contained) gases
outstanding thermal protection as well that have ozone depletion potential
as four added benefits: (ODP) or global warming potential
(GWP).

ROCKWOOL is approximately 97%

Fire resistance recyclable. For waste ROCKWOOL
material that may be generated
during installation or at end of life, we
Acoustic comfort are happy to discuss the individual
requirements of contractors and users
Sustainable materials considering returning these materials to
our factory for recycling.
Durability

Health & Safety

The safety of ROCKWOOL stone wool
is confirmed by current UK and Republic
of Ireland health & safety regulations
and EU directive 97/69/EC:ROCKWOOL
fibres are not classified as a possible
human carcinogen.

A Material Safety Data Sheet is

available and can be downloaded
from www.rockwool.co.uk to assist in
the preparation of risk assessments, as
required by the Control of Substances
Hazardous to Health Regulations
(COSHH).

Interested?
For further information, contact the Technical Solutions Team on 01656 868490
or email technical.solutions@rockwool.co.uk
Visit www.rockwool.co.uk to view our complete range of products and services.
Copyright ROCKWOOL September 2018.

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 ROCKWOOL® FIREPRO®

The ROCKWOOL trademark Disclaimer

ROCKWOOL® - our trademark ROCKWOOL Limited reserves the right to alter or
amend the specification of products without notice
The ROCKWOOL trademark was initially registered
as our policy is one of constant improvement. The
in Denmark as a logo mark back in 1936. In 1937, it
information contained in this brochure is believed
was accompanied with a word mark registration; a
to be correct at the date of publication. Whilst
registration which is now extended to more than 60
ROCKWOOL will endeavour to keep its publications
countries around the word.
up to date, readers will appreciate that between
The ROCKWOOL trademark is one of the largest publications there may be pertinent changes in the
assets in the ROCKWOOL Group, and thus well law, or other developments affecting the accuracy
protected and defended by us throughout the world. of the information contained in this brochure.
The applications referred to within the brochure
If you require permission to use the ROCKWOOL
do not necessarily represent an exhaustive list
logo for your business, advertising or promotion.
of applications. ROCKWOOL Limited does not
You must apply for a Trade Mark Usage Agreement.
accept responsibility for the consequences of using
To apply, write to:
ROCKWOOL in applications different from those
marketcom@rockwool.com
described within this brochure. Expert advice should
be sought where such different applications are
Trademarks contemplated, or where the extent of any listed
application is in doubt.
The following are registered trademarks of the
ROCKWOOL Group: © ROCKWOOL 2019. All rights reserved.

BUILDING SERVICES
ROCKWOOL®
ROCKCLOSE® Product disclaimer
RAINSCREEN DUO SLAB® ROCKWOOL fire protection and stopping
products should only be installed by ‘competent
HARDROCK®
persons’ as outlined in the UK and Ireland Building
ROCKFLOOR® Regulations.
FLEXI® All products listed should be utilised only
for applications as outlined in this guide, in
BEAMCLAD® accordance with the current ROCKWOOL
FIREPRO® guidelines, and in accordance with the relevant
ROCKWOOL Fire Resistance Testing.
For further information please visit
www.rockwool.co.uk, contact our Technical
Solutions Team
on 01656 868490, or email:
technicalsolutions@rockwool.co.uk

Photography and illustrations

The product illustrations are the property of
ROCKWOOL ltd and have been created for
indicative purposes only.
Unless indicated below, the photography and
illustrations used in this guide are the property of
ROCKWOOL Limited. We reserve all rights to the
usage of these images.
If you require permission to use ROCKWOOL
images, you must apply for a Usage Agreement. To
apply, write to: marketcom@rockwool.com

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181
April 2019

ROCKWOOL Limited
Pencoed
Bridgend
CF35 6NY
Tel: 01656 862 621
info@rockwool.co.uk
rockwool.co.uk