M AT E R I A L D ATA S H E E T
U32
Agglomerated cork
resilient layer for
impact noise insulation
of floating screed
P R O D U C T S P E C I F I C AT I O N
“___mm resilient acoustic underscreed made of agglomerated
cork with PU (polyurethane) elastomer bonding agent for impact A C O U S T I C A L R E S U LT S
noise insulation of floating screeds, with a density between 150
and 220kg/m³ and an impact noise reduction ΔLw of___dB.” Thickness (mm) 6/3
ΔLw(dB) ➀ 20
K E Y F E AT U R E S IIC (dB) 58
▸▸ Impact noise reduction and thermal insulation properties
▸▸ Very easy to handle and long term resilience Thickness (mm) 8/4
▸▸ Natural and sustainable product ΔLw(dB) ➀ 21
▸▸ Low creep
IIC (dB) 52
THERMAL PROPERTIES Thickness (mm) 10/5
ΔLw(dB) ➀ 22
Thermal Conductivity (W/mK) 0,04 ➀
➀ ISO 8301 IIC (dB) 54
➀ ISO 10140-3 and ISO 717-2
Note: IIC for 8/4 mm is validated to ASTM E2179-03 and ASTM E492-09; IIC for 6/3 mm
PHYSICAL AND MECHANICAL PROPERTIES and 10/5 mm are extrapolated-based according to the correlation between ISO 140-6
and ASTM E492. Practical tests are being performed.
Specific Weight (Kg/m³) ➀ 150–220
Tensile Strength (KPa) ➀ > 200 S TA N D A R D D I M E N S I O N S
Recovery after 0.7MPa (%) ➀ > 70
Thickness (mm) 6/3 8/4 10/5
➀ According to ISO 7322
Width (m) x Length (m) 1X20 1x15 1x10
Others sizes available upon request
A C O U S T I C A L R E S U LT S A C O U S T I C A L R E S U LT S
Test procedure as per ISO 10140-1:2010; ISO 10140-3:2010; Test procedure according to ISO 10140-1:2010; ISO 1040-3:
ISO 10140-4:2010; ISO 717-2:2013 2010 and ISO 10140-4:2010 standards. Normalized impact sound
pressure level and IIC rating determined according ASTM E492-09
and ASTM E989-06 standards.
80 80
Normalized impact pressure level L [dB]
Normalized impact pressure level L [dB]
70 70
60 60
50 50
40 40
30 30
20 20
100
125
160
200
250
315
400
500
630
800
1000
1250
1600
2000
2500
3150
4000
5000
100
125
160
200
250
315
400
500
630
800
1000
1250
1600
2000
2500
3150
4000
5000
Frequency [Hz] Frequency [Hz]
Ln,r,0 (dB) Ln,r (dB) - 6/3mm Ln,r (dB) - 8/4mm Ln,r (dB) - 10/5mm Ln,r,0 (dB) Ln,r (dB) - 6/3mm Ln,r (dB) - 8/4mm Ln,r (dB) - 10/5mm
Ln,r Normalized impact sound pressure level of the reference floor Lref Normalized impact sound pressure level of the reference floor
with the floor covering under test with the floor covering under test
Ln,r,0 Normalized impact sound pressure level of the Lab reference floor Lref.c Normalized impact sound pressure level of the Lab reference floor
ΔLw Impact sound pressure level reduction index of the covering under test,
on a normalized floor
Thickness (mm) 6/3 8/4 10/5
Ref. Test Report ACL042/14 IIC (dB) 58 52 54
Note: IIC for 8/4 mm is validated to ASTM E2179-03 and ASTM E492-09; IIC for 6/3 mm
Thickness (mm) 6/3 and 10/5 mm are extrapolated-based according to the correlation between ISO 140-6
and ASTM E492. Practical tests are being performed.
Ln,r,w (Cl,r) (dB) 58 (1)
ΔLw (Cl,Δ) (dB) 20 (-12)
T E S T A P PA R AT U S ( Δ L W & I I C )
Ref. Test Report ACU242/09
❶ Concrete floating screed
with 70mm thickness
Thickness (mm) 8/4
❷ Agglomerated cork
Ln,r,w (Cl,r) (dB) 57 (7) resilient layer with one
face dimpled - U32 Profile
ΔLw (Cl,Δ) (dB) 21 (-18) ❸ Reinforced concrete slab
of thickness 140mm
Ref. Test Report ACL107/15
Thickness (mm) 10/5
Ln,r,w (Cl,r) (dB) 56 (3)
DYNAMIC STIFFNESS
ΔLw (Cl,Δ) (dB) 22 (-14)
Thickness (mm) 6/3 8/4 10/5
Dynamic Stiffness (MN/m³) ➀ 107 86 43
➀ as per ISO 9052-1:1989; ISO 7626-5:1994
PHYSICAL AND MECHANICAL PROPERTIES I N S TA L L AT I O N
LOAD DEFLECTION
1.00 Stress [MPa]
0.75
0.50
0.25
Deflection [mm]
0
0 0.5 1 1.5 2 2.5 3
6/3mm 8/4mm 10/5mm
❶ Reinforced concrete slab
C REEP DEFLECTI O N @ 0.004 5 MPA ( % O F STA RT H E I G H T )
❷ Foil
❸ Agglomerated cork resilient layer - U32
4.0%
❹ Concrete floating screed
3.5%
❺ Perimeter insulation barrier
3.0%
❻ Adhesive tape
2.5%
2.0%
1.5%
1.0%
0.5%
Time [h]
0.0%
10¹ 10² 10³ 10⁴ 10⁵
U32 Profile
Note: Following ISO8013-1998 measured in Cantilever Test System
G E N E R A L I N S TA L L AT I O N I N S T R U C T I O N S
The following installation instructions are recommended by Installation Instruction for Acousticork U32
Amorim Cork Composites, but are not intended as a definitive Unpack the Acousticork U32 at least 24h before the installation
project specification. They are presented in an attempt to be and store it in the room where the installation will take place.
used with recommended installation procedures of the flooring Cut and trim the Acousticork U32 to the desired size to fit the
manufacturers and screed. installation. Apply directly over the subfloor. Always ensure that
material is installed to fit the application avoiding the creation of
Room Conditions waves in the material. In case of profile material, dimple side must
Temperature > -5ºC / Room moisture content < 75%. face down.
Subfloor Place the Acousticork U32 directly against the insulation perimeter
All subfloor work should be structurally sound, clear and level. The barrier already installed. Proceed to cover the entire floor making
moisture content of the subfloor should not be more than 2.5% sure that the joints are butted tight and use an adequate tape
(CM) by weight measured on concrete subfloors. to fix it. After completion, the Acousticork U32 should cover the
entire flooring area without gaps and with joints securely taped.
Perimeter Insulation Barrier An waterproof membrane (ex. Polyethylene foil) minimum 0.2mm
Install a perimeter insulation barrier vertically around the entire covering the entire flooring area MUST be installed prior to the
perimeter of the room with width equal to that of the floor screed. Install it, minimum 150mm wide vertically and overlapping
build up. This is highly recommended in order to avoid lateral it, minimum 100mm. After completion, the insulation vapour
propagation of impact noise. The barrier must also be applied in barrier should cover the entire Acousticork U32 area without gaps.
the perimeter of pipes, ducts or any other component protruding Never mechanically fasten the Acousticork U32 and/or the PE foil
from the floor. Spot adhere the strips to the wall using acrylic barrier with screws, nails or staples as this will severely diminish
glue or a bead of silicone sealant. the performance of the insulation barrier.
Screed and Final Flooring
Cast a suitable screed over the loose laid PE foil previously
PB U32 installed over the product.
Mini-rolls of perimeter barrier Always follow manufacturers recommended installation
available upon request. instructions.
For detailed installation instructions, please contact us.
M AT E R I A L D ATA S H E E T U 3 2
The data provided in this Material Data Sheet represents typical values. This information is not intended to be used as a purchasing specification and does not imply suitability for use in a
specific application. Failure to select the proper product may result in either equipments damage or personal injury. Please contact Amorim Cork Composites regarding specific application
recommendations. Amorim Cork Composites expressly disclaims all warranties, including any implied warranties or merchantability or of fitness for a particular purpose. Amorim Cork
Composites is not liable for any indirect special, incidental, consequential, or punitive damages as a result of using the information listed in this MDS. Any of its material specification sheets, its
products or any future use or re-use of them by any person or entity. For contractual purposes, please request our Product Specifications Sheet (PDA).
www.amorimcorkcomposites.com CTP-00089/2 | OCT 2021| EN
