construction type Cavity barriers SEPTEMBER 2012

Fire Barrier Systems

Inhibiting the spread of fire & smoke

in concealed areas
construction type Cavity barriers SEPTEMBER 2012

Fire Barrier Systems

Inhibiting the spread of fire & smoke in concealed spaces

As part of the comprehensive FIREPRO® range of

products, ROCKWOOL® Fire Barrier systems offer
labour-saving solutions to prevent fire and smoke
spread within roof and ceiling voids for all general
conditions encountered on site.
The vertically hung Fire Barriers are capable of achieving
both integrity and insulation protection periods from
15 to 120 minutes, and the friction fitted Fire Barrier Slab
will also provide 60 minutes integrity and insulation. It is
ROCKWOOL®’s essential insulation performance that limits
the heat transfer through the barriers, preventing ignition of
combustible materials in adjacent areas.

The ‘Quick Fit’ support system is patented (grant number is

GB2393119B) and offers a quick, cost effective installation
method for the Fire Barriers for periods of up to 60 minutes.
This focus on ease of construction and installation has the Fixing solutions to concrete decks using ROCKWOOL® Fire Barrier

added benefit of reducing the risks of installation error.

90 and 120 minute systems are also available using the
traditional support methods (see section on 1½ and 2 hour
barriers for typical specification).

Extended drops are easily catered for, with the system capable
of maintaining its performance in void heights up to 10.5 metres
– refer to sections on extended drops for further guidance.

Fixing solutions to concrete decks – The benefits:

Fast new patented angle and clamping plate system

No nuts and bolts to fasten
Simple hammer fix fixing system
Simple angle support with stamped tongues
One angle supports 2 barriers for 1 hour
Fixing solutions to timber and steel using ROCKWOOL® Fire Barrier
Fixing solutions to timber and steel – The benefits:
No bolts required
Standard no.10 wood screws for timber
Self tapping screws for steel purlins
Fixings for clamping plate extended to 450mm
• Speed of installation increased
• Costs of installation reduced

Firestopping solutions for voids up to 1 metre

using FireBarrier Slab – The benefits:
Simple butt joint foil faced slab
No fasteners or angles
Cost of installation reduced
Only 40mm intumescent sealant coat back to penetrations
Firestopping solutions for voids up to 1 m using ROCKWOOL® Fire Barrier Slab

The following NBS Plus clauses include ‘Fire Barrier’: K10-530, K10-545, K40-60,
K40-287, K40-425, K40-431, K45-13, P10-75, P10-410, P10-430, P10-440
‘Fire Barrier Slab’: F30-670, K10-545, P10-432, P12-40, P12-360
construction type Cavity barriers SEPTEMBER 2012

Description, performance & properties

Product Fire perfomance

Integrity (mins) Insulation (mins) Report no. Specification
½ hour Cavity Barrier 60 15 116911 1 layer 50mm

½ hour 60 30 119720 1 layer 60mm Fire Barrier

foil faced overlapped joints
1 hour Fire Barrier 60 60 116912 2 layers 50mm Fire Barrier
staggered vertical joints
1½ hour Fire Barrier 90 90 51812 2 layers 50mm Fire Barrier
staggered vertical joints
2 hour Fire Barrier 120 120 44509 2 layers 60mm Fire Barrier foil faced
separated by 40mm airspace
1 hour Fire Barrier Slab 240 60 122729 100mm foil faced slab

It is essential to ensure that the fire insulation criteria of any barrier specified meets the requirements set out in the Approved Document B.

Description Standards & regulations

ROCKWOOL® Fire Barrier has a 25mm galvanised wire mesh ROCKWOOL® ½, 1, 1½ and 2 hour cavity/ fire barriers
stitched with wire, to one face, to produce a flexible Fire satisfies the requirements of the Building Regulations 1991
Barrier with optional aluminium foil faces. (2000 edition). Approved Document B and Appendix A, Table
A1, for 30 minutes integrity and 15 minutes insulation.
ROCKWOOL® Fire Barrier Slab has a factory applied foil finish
to both faces. ROCKWOOL® Fire Barriers and Fire Barrier Slabs can be
used where fire resistant walls need to be continued above
ROCKWOOL® Fire Barrier and Fire Barrier Slab achieve
a ceiling into the roof void. They conform with the Building
a reaction to fire classification of A1 as defined in
Regulations Approved Document B and fulfil all normal fire
BS EN 13501:1. ROCKWOOL® Fire Barrier systems have
insulation requirements for divisions of space.
been developed to inhibit the spread of flames, heat and
smoke through concealed spaces in buildings and improve
Fire Barrier Systems are third party approved by the
sound reduction.
Loss Prevention Council Certification board (LPCB) for
The fixing solutions described in this data sheet have been performance and quality and are listed in the Red Book -
designed to simplify detailing and incorporate, where certificate no. 022c. Certificates can be accessed online at
possible, commonly available building fasteners and www.rockwool.co.uk or www.redbooklive.com
components.
Acoustic performance
Fire Barrier slab dimensions The correct use of Fire Barrier within structural cavities and
1000mm x 600mm x 100mm voids will reduce the level of transmitted sound.

Fire Barrier dimensions Room to room attenuation Rw dB

Typical lay-in grid suspended ceiling 30
Standard width 1 metre
Thickness (mm) Length (m) As above, with 50mm ROCKWOOL® Fire Barrier 42

50 4 Applied as 2, but ROCKWOOL® Fire Barrier foil 44

faced
60 3-5
Applied as 2, but two thickness of 50mm 50
ROCKWOOL® Fire Barrier – both foil faced
Applications & design
ROCKWOOL® Fire Barrier solutions can be applied as a ROCKWOOL® Fire Barrier Slab foil faced both 50
faces
hanging curtain or as a friction fitted slab. The barrier is
continuously supported and secured to the soffit by its head. If ceiling is plasterboard, add between 2–3 db
At the base, it is preferable in a cavity barrier situation to wire Note: values are approximate
the barrier to the ceiling grid although it is acceptable to let it
SoundPro range of acoustic solutions
drape freely, turned back across the ceiling.
Fire Barrier Systems are part of the ROCKWOOL® SoundPro
If the Fire Barrier is to form a continuation within a void of a range of acoustic solutions.
fireresistant wall/partition, it is essential to fix the barrier to
the wall/partition head to maintain integrity.
construction type Cavity barriers SEPTEMBER 2012

½ hour Cavity Barrier – typical fixing methods

Figures 1–6 show typical details for Fire Barrier applied to a For fixing to timber, the ROCKWOOL® clamping plate is used,
timber truss construction as a half hour cavity barrier within compressing the barrier to the timber, fixed at 450mm
the roof section, to satisfy the requirements of Building centres using No. 10 woodscrews. For fixing to concrete
Regulation B3 – (4) i.e. 30 minutes fire integrity and soffits, the pre-punched angle support is fixed using Hilti DBZ
15 minutes fire integrity. or Ejot ECL 35 hammer set anchors at max. 750mm centres.
For fixing to steel purlins, use Hilti SMD 02Z (5.5 x 70mm)
If the truss is constructed from a minimum timber size of
self-tapping screws at max. 450mm centres.
35 to 49mm thick, both sides of all truss members/bracing
require protection from fire in order to minimise charring To use the patented ROCKWOOL® angle support system, bend
and retain strength. Figure 3 shows strips of 50mm Fire tongues out to 90° and impale barrier onto them. The slotted
Barrier used on the reverse side of the truss (for this clamping plate is then fitted by pushing the tongues through
purpose). Nail plate fixings may fail prematurely in fire unless the slots, these are then bent over the face of the clamping
protected (see Fig 6). plate completing the process.
The new ROCKWOOL® fixing system incorporates an angle ROCKWOOL® Angle Support
The tongue has two
support and clamping plate. positions for bending

ROCKWOOL® Clamping Plate

min 200mm min 200mm

Allow sufficient material
RWA45 RWA45
to pack and stitch Fire
tiled or slated roof tiled or slated roof
Barrier between
rafters as RW clamping plate 35-49mm thick
timber trussed rafter
shown No. 10 wood screws at
RW maximum 450mm centres
0.9mm wire stitching to
clamping minimum 50mm thick secure strips to main
timber trussed rafter barrier - stitches typically
plate
Rockwool 50mm Fire Barrier min 100mm long
Tongues at tightly butt jointed and 50mm
No. 10 wood screws (or
max 450mm stitched (see Fig.12)
large washer and screw)
centres clamping plate at max. 450mm centres
Continuous angle support
secured to underside of each No. 10 wood screws at 50mm Fire Barrier
maximum 450mm centres
rafter with no 10 wood screws
Figure 1 Fire Barrier transverse to rafters Figure 2 Half hour protection for timber truss Figure 3 Half hour protection for timber truss
construction 50mm thick or more. Note: Nail construction 35 to 49mm thick
plate protection required – see Figure 6
ROCKWOOL®
Fire Barrier

25mm thick ROCKWOOL BEAMCLAD® fixed with

Firepro® Glue and nailed, or 50mm Fire Barrier
secured with screws and large square washers.
Ceiling board Use 50mm nails for ROCKWOOL BEAMCLAD®
and 70mm screws for Fire Barrier

Figure 4 Head of partition Figure 5 Barrier fitted transversely to timber Figure 6 Nail plate protection
joisted ceiling

Hilti DBZ 6/4.5 or Ejot ECL 35

hammer set anchor

ed Angle support
gs fix
t tan fixed as Fig 18
s u ppor centres
Anglet 450mm max m
a 450m
Barrier cut and packed
4 5 0mm into troughs and wired 50mm Fire Barrier
max
to prevent uncoiling compressed
RW clamping plate between soffit and
fixed at 450mm centres clamping plate at
max 450mm centres

Figure 7 50mm Fire Barrier fixed to Figure 8 50mm Fire Barrier running across Figure 9 Alternative fixing to flat soffit or perimeter,
concrete soffit ribbed soffit – Section appropriate to barriers with a shallow drop
construction type Cavity barriers SEPTEMBER 2012

60–30 Fire Barrier Wire stitching of butt joints in ROCKWOOL® Fire Barriers
If 30 minutes insulation is required, use 1 layer of 60mm foil Adjacent barriers must be closely butt jointed, or overlapped,
faced fire barrier with 100mm vertical over lapped joints and through stitched with 0.9mm galvanised annealed wire.
(Fig 13). The barrier is otherwise fixed as previously shown It is essential that the barrier provides a good seal at its head,
for timber construction on page 31. perimeter and at all joints. Where the barrier abuts a profile
such as a trapezoidal deck, the material must be cut to suit
Common details and secured to fire stop the gap (see Fig.10). For extended
Extended drops drops, 1.5mm diameter galvanised and annealed wire is used
ROCKWOOL® 50mm Fire Barrier single and double layers, (see Fig. 14).
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 14. For additional guidance
and drops in excess of 6m, lease refer to figure 30 and
associated guidance.

Fire Barrier cut and pushed up into angle or clamping plate

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

max 450 max 450

adjacent Barriers butt jointed Fire Barrier draped over

and wired tightly together suspended ceiling and wired
as Fig 12 to grid, min 100mm lap.
If not wired, overlap
is min 150mm

Figure 10 50mm Fire Barrier applied below metal roof decking

Figure 11 Joint in Barrier – Elevation Figure 12 60mm Fire Barrier with overlap joints to
obtain 60 mins integrity 30 mins insulation
construction type Cavity barriers SEPTEMBER 2012

Penetration details should be extended to at least 1000mm either side of the

It is regarded as good practice to adequately support or barrier. This guidance applies to services such as pipes,
min reinforce services penetrating compartment walls and cavity sheathed cables and conduits, including those carried on
100mmbarriers, to prevent displacement. It is recommended that steel trays.
100mm typical
such supports should be no greater than 500mm from each
For protected steel ductwork with a tested fire resistance
face of the Fire Barrier.
performance (stability, integrity and insulation) at least the
To maintain the integrity of the Fire/Cavity Barrier when same as the Fire Barrier, 300mm sleeves should be applied
penetrated by services with a high melting point (such as either side of the main barrier, as for high melting point
steel or copper pipes, beams or trusses) the barrier is first services above. For information on achieving fire
cut locally to accommodate the service or structural member protection to steel ductwork, please refer to the ROCKWOOL®
and then re-stitched as neatly as possible. The penetration Fire Duct System data sheet. For non-fire protected
is then lightly sleeved each side of the barrier to a minimum ductwork, or that with a fire resistance performance less than
length of 300mm, using the same barrier material. Each the barrier, two sleeves should be applied to each side of the
sleeve should be securely stitched to the main barrier to barrier. An inner sleeve of 1000mm and an outer sleeve of
produce a tight seal and prevent future detachment (see 300mm. All sleeves should be stitched to the main barrier.
figures 14 and 16). Where access is only available from one
The duct should also include an independently supported
side, the double seal solution may be replaced by a single
fire damper, located in the line of the main barrier.
‘collar’ detail – please contact our technical solutions team
Reference should also be made to Approved Document
for further advice.
B of England & Wales Building Regulations – Volume 1,
If the penetrating service is manufactured from low melting Requirement B3, Section 7 and Volume 2, Requirements B3,
point materials such as plastic or aluminium, then sleeving Section 10.

min 100mm

min
100mm
100mm typical

Figure 13 Figure 14 50mm Fire Barrier extended from 3.5m to

6m using a 1.5mm dia. wire-stitched overlapped joint

Fire barrier Sleeves wire stitched Sleeve to be stitched

material backing through main barrier to main barrier
Off-cuts of Fire Barrier
to be packed tightly
into purlin void

1m min 300mm min

min 100mm
Figure 15 Penetration of Fire Barrier by pipework and ductwork. Length of Figure 16 50mm Fire Barrier running parallel with metal deck
pipe sleeving: 300mm for high melting point pipes such as steel or copper, profiles NB. Fire barrier must be fixed to a structural loadbearing
1,000mm for lower melting point pipes such as plastic or aluminium. support between purlings
construction type Cavity barriers SEPTEMBER 2012

1 hour Fire Barrier – typical fixing methods

The unique, patented ROCKWOOL® support angle and Fixing to timber structure (1 hour)
clamping plate is used to fasten two 50mm Fire Barrier When a 1 hour Fire Barrier is supported on structural timber
curtains with one support angle without the need for an (for example a trussed rafter), and the thickness of timber
airspace. is 35–49mm, one layer of 60mm ROCKWOOL® Fire Barrier
must be placed on each side of the timber (see Figure 18).
The ROCKWOOL® support angle has tongues that are
Where timber thickness is 50mm or greater, 2 layers of
pushed out from opposite sides at 300mm max. centres. The
50mm Fire Barrier are sufficient.
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. (Please note; wire reinforced sides should
be placed outwards).

support angle fixed to

soffit at max 750mm cent res
clamping pla tes fixed at
300mm centres clamping pla te
fixed at 300mm cent res
RWA45
fill space between battens
with 300mm wide RWA45

RW clamping plate
No. 10 wood screws at
concrete soffit maximum 450mm centres
35mm thick
300mm 300mm timber trussed rafter
max max two layers of 50mm Rockwool
Fire Barrier, vertical joints 60mm Rockwool Fire Barrier
staggered and stitched and tightly butt jointed and
clamped to head of wall stitched (see Fig. 12)
suspended ceiling clamping plate
No. 10 wood screws at
maximum 450mm centres

fire-resisting 1 hour fire rated ceiling

wall

Figure 17 One hour Fire Barrier – General view Figure 18 One hour protection for timber truss
construction between 35 - 49mm thick

Hilti DBZ 6/4.5

or Ejot ECL 35 Fire barrier
hammer set support angle
clamping plate
anchor at max
750mm centres
Hilti hammer
screws at
max. 450mm
centres
concrete soffit clamping plate

two layers of
50mm Fire
Barrier with screw system
vertical joints at max 450mm centres
staggered

Figure 19 One hour – fixing to head Figure 20 One hour Fire Barrier Perimeter Figure 21 One hour – Fire Barrier Base detail
fixing – Plan view
construction type Cavity barriers SEPTEMBER 2012

1½ hour and 2 hour Fire Barrier – typical fixing methods

1½ hour Fire Barrier Angle and strap for 1½ and 2 hour Fire Barriers
The ROCKWOOL® 1½ hour Fire Barrier system uses 2 layers The following specification for slotted angles and straps is
of 50mm fire barrier with staggered joints fixed as Fig. 22–24. suitable for supporting ROCKWOOL® Fire Barriers for 1½
Please note: Wire reinforced faces should be placed and 2 hours when tested to BS 476: Part 22. Slotted angles
outwards. (62 x 41 x 2mm) and straps (38 x 2mm) manufactured from
mild steel conforming to BS 1449: Part 1.1: 1991 and cold
2 hour Fire Barrier reduced to provide a minimum of 0.2% proof stress of 417
The ROCKWOOL® 2 hour Fire Barrier consists of two layers Mpa (27 tons/in2) and conforming to BS 4345: 1968 (1986) –
of 60mm foil-faced, wire stitched Fire Barrier with staggered Specification for slotted angles (inc. flat strap).
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.

M8 expanding bolt 2mm tested

anchors at max. angle
750mm centres

clamped at max 300mm centres 2mm tested angle fixed to

concrete 2mm tested
with M6 bolts and nuts soffit at max 750mm
soffit punched
centres. See Fig 22
strap
M6 bolts two layers
and nuts of 50mm
staggered Fire Barrier
concrete soffit each side withvertical
two layers of 50mm joints
300 300 150 Rockwool Fire Barrier, staggered
mm mm mm vertical joints staggered
max max max and stitched
suspended ceiling
fire-resisting wall
Figure 23 11⁄2 hour Fire Barrier – section at head

Figure 22
Hilti HUS
universal
Screw
System 2mm
max. tested
300mm punched
centres strap

Figure 24 11⁄2 hour – Fire Barrier base detail

construction type Cavity barriers SEPTEMBER 2012

Durability Site advisory service

For durability, we recommend that the finish should be ROCKWOOL® provides a site advisory service by engineers,
capable of withstanding at least 200 hours salt spray and 400 solely employed to assist with advice when installing
hours humidity corrosion resistance testing to BS 3990: ROCKWOOL® materials on site. The service is intended
Part F. Slotted angles and straps conforming to this for site guidance, but is not intended to be an inspection
specification are available from the following suppliers: facility unless agreed under a separately financed
JB Products Tel: 01384 240234 contract agreement.
Link 51 Tel: 01952 682251
For approval of installed barriers, the installer or
Romstor Tel: 01442 242261
building owner will be referred to a suitably accredited
If other hardware is used to support the barriers, we and experienced fire assessor or fire safety engineering
recommend that the respective specifier, supplier or installer organisation.
should be certain that the chosen fixing system has been both
tested and approved, for the required period of fire resistance
and drop height.

M8 expanding bolt anchors

at max. 750mm centres

2mm tested strap clamped

at max 300mm centres 2mm tested angle fixed to
with M6 bolts and nuts soffit at max 750mm 2mm punched
centres. See Fig 25 strap
M6 bolts
and nuts
2mm punched
angles
concrete soffit
two layers of foil-faced, wire
reinforced 60mm Fire Barrier,
with foil outwards, vertical joints
staggered and stitched. 40mm
air space between the two layers

suspended ceiling Figure 26 Two hour Fire Barrier – section at head

fire-resisting
wall

Figure 25 Two hour Fire Barrier – General view 2 layers 60mm

foil faced Fire
Barrier

2mm punched strap

and Universal Screw
System at max.
300mm centres

2mm punched
strap
ceiling

Figure 27 Two hour Fire Barrier - base detail

construction type Cavity barriers SEPTEMBER 2012

Proprietary fixings
All steel hammer set expansion anchors for soffit fixings are
available from Hilti, or Ejot. For perimeter fixings to concrete
Steel angle Splice
or masonry, use Hilti HUS Universal Screw system. 3.5m Max
For fixings to timber, use standard No. 10 steel wood Punched
screws 100mm long. steel strips

References

Publications Approx 2100mm Approx 2100mm

For further information on the design of cavity barriers and 3.5m Max
firestops, reference should be made to the BRE Current Steel angle
Paper 7/77 whilst BRE Digest Nos. 214 and 215 discuss
practical problems and solutions.

Supply Additional
ROCKWOOL® Fire Barrier support angle and clamping plate straps for
60/90/120 3.5m Max
are specially manufactured for ROCKWOOL®. systems

Clamping Plate:
3metres x 40mm, 10 lengths per pack
Fire Barrier Support Angles: Figure 30
3m x 34mm x 75mm, 10 lengths per pack
ROCKWOOL® Acoustic Intumescent Sealant: Barrier Max height Max height Integrity Insulation
configuration no additional additional (mins) (mins)
310ml cartridges, 25 per box
support support
Prices and conditions of sale 50mm 3 metres 10-5 metres 60 15
Available upon request. single layer 6 metres* 30 15
50mm 3-5 metres 10-5 metres 90 90
Packaging of Fire Barrier
double layer 6 metres* 60 60
Shrink wrapped in polyethylene.
60mm double 3-5 metres 9 metres 120 120
General design considerations layer with
A cavity fire barrier must be designed to restrict the passage cavity
of both hot smoke and flame for the minimum specified * Horizontal overlapped joint required (see fig.14)
period, as listed in Approved Document B in support of the
Building Regulations. In addition, it must be fixed in such a
way that: Fire barriers and dampers
Where ROCKWOOL® Fire Barriers are installed in conjunction
It will remain effective in the event of structural movement with fire dampers, the dampers must be supported
There are no gaps where it abuts other elements independently of the fire barrier. HVCA or ASFP publications
of construction may be helpful.

It complies with the requirements of Approved Document Access through barriers
B of the Building Regulations. Where regular access is required through the barriers for
maintenance purposes etc, this should be achieved by the
Extended drops inclusion of an independently supported fire rated door set
For periods of up to 50 minutes, ROCKWOOL® Fire Barriers and frame. The Fire Barriers should be clamped to the door
can be used for extended void heights between 3.5 and 6m frame with the RW clamping plate and appropriate fixings at
without the need for a supported frame – see Figure 14 for 450mm centres.
joining barriers with overlap. For periods of up to 90 minutes,
this drop height can be increased to 10.5m (9m for 120 Work on site
minutes), by the use of a simple frame system constructed Handling and storage
from slotted angles and straps (see 1½ and 2 hour ROCKWOOL® Fire Barriers are easy to handle. It is easy to
support systems). cut to any shape. The product should be stored indoors or
Further details are available from The Technical under a weatherproof covering.
Solutions Team. Maintenance
Once installed ROCKWOOL® Fire Barriers should need
no maintenance.
construction type Cavity barriers SEPTEMBER 2012

Fire Barrier Slab

Fire Barrier Slab offers a new solution to this typical
application for up to 4 hours integrity. ROCKWOOL® Fire
Barrier Slab is an aluminium foil faced slab used to close
voids of up to 1m in height and 20m in length supported by a
masonary wall (minimum density of 400 kg/m3) offering the
same fire performance.

The slabs are cut to height and friction fitted within the
opening. Acoustic Intumescent Sealant is applied to the butt
joints and perimeter of the barrier.

Service penetrations
The ROCKWOOL® Fire Barrier Slab can be penetrated by
steel pipes of up to 33mm external diameter or smaller, and
steel cable trays of 305 x 50mm or smaller.

These penetrating services must be independently supported

a maximum of 150mm from the face of the slabs. Acoustic
Intumescent Sealant is applied to form a tight bond where the
penetration passes through the face of the slab, as shown in
Figure 29.

Fire performance of ROCKWOOL® Fire Barrier Slab

No penetrations - 4 hour integrity; 1 hour insulation
Service penetrations 1½ hour integrity; 1 hour insulation
When subjected to BS 476:Part 20 and 22: 1987 – reference
WFRC – report C122729.

ROCKWOOL® Acoustic Intumescent Sealant Figure 28 One hour Fire Barrier Slab – general view

All joints use Acoustic Intumescent Sealant to ensure a tight

fit during a fire situation.

Flammability
When subjected to flame, Acoustic Intumescent Sealant will
expand and char, blocking the passage of smoke and flame
(see Figure 29).

Service temperature range

-20°C to +70°C

Coverage
Based on a 9mm x 6mm joint, one tube will cover cable tray or
steel pipe
approximately 5.5 linear metres. Acoustic Intumescent 16mm
Sealant must be applied with a minimum width of 6mm
and a max width of 20mm.
40mm
ROCKWOOL® Acoustic
The Acoustic Intumescent Sealant will allow for 10% Intumescent sealant
compression and tension movement with a butt joint.

Acoustic Intumescent Sealant is supplied in 310 ml tubes,

25 tubes to a box.

Packaging of Fire Barrier Slabs

Two slabs per pack enclosed in polythene.

Figure 29 Section through steel penetration

 SEPTEMBER 2012

Health and Safety

In accordance with REACH health and environment
regulations, there are no hazardous classifications associated
with ROCKWOOL® mineral wool in respect to physical, health
and environmental considerations.

More information
ROCKWOOL® Limited reserves the right to alter or amend the
specification of products without notice as our policy is one of
constant improvement. The information contained in this data
sheet is believed to be correct at the date of publication.

Interested?

For further information, contact the Technical Solutions Team

on 0871 222 1780 or email info@rockwool.co.uk

Visit www.rockwool.co.uk to view our complete range

of products and services.

ROCKWOOL® Limited
Pencoed
Bridgend
CF35 6NY

info@rockwool.co.uk
www.rockwool.co.uk