Acoustica Silver Underlay

High density resilient sponge rubber underlay with moisture barrier for laminate and timber floors

Suitable for both domestic and contract applications

for use under floating laminate, solid timber and engineered wooden floors Excellent moisture resistance when used in conjunction with waterproof tape.

Designed for use with normal operating underfloor heating systems.*1 Guaranteed for the serviceable lifetime of the floorcovering under which it is laid when used in the recommended locations.

Not suitable for installation over wood-block or parquet subfloors.

Roll size: 1m x 10m = 10.00m2

Specification                                              Result                                                                    Method

Nominal Weight:

1800 g/m²

Nominal Roll Weight:

18.00 kg


2.0 mm

BS 4051

Mean original thickness from nominal thickness

5.0 %

Difference between max. & min. original thickness.

0.1 mm

Tensile Strength - Length

750 kPa

EN ISO 1798:2000

Tensile Strength – Width

600 kPa

Elongation @ break – length


Elongation @ break – width


Compressive stress @ 25% strain

20 kPa

ENO ISO 3386 Pt2: 1998

Compressive stress @ 50% strain

170 kPa

Barrier properties – moisture resistance (g/m224hrs@38°C/90%RH)

Typical value: 1.5

ASTM F1249

Hot Met Nut Test

Pass – LOW radius of effects of ignition

Tested to BS 4790 Rated to BS 5287

Thermal Resistance (Tog)

Est. 0.22 togs

BS 4745

Acoustic Properties

Weighted Impact Sound Improvement Index (∆Lw)

Est. 22dB

Test procedure to

ISO 140-8 1998, rated to

ISO 717-2 1997

*1 We recommend that the advice of the heating system manufacturer be sought to identify the maximum tog rating for the combined floorcovering and underlay.