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Marmox (UK) Ltd Third party certifications:
  • BBA Agrément Certificate

    BBA Agrément Certificate

    Certificate type

Impact sound and thermal insulating floor panel.

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+44 (0)1634 835290 www.marmox.co.uk


Designed to reduce the noise that can be heard in the room or flat below, and is suitable for use on timber or concrete flooring types.


Waterproof tile backer boards for floors providing decoupling, impact sound insulation and thermal insulation, used to stop footfall noise on a tiled floor being heard in the room or flat underneath.

Features and benefits:

  • Offers waterproof, thermal insulation (thermal conductivity 0.04 W/m·K).
  • Has an impact-absorbing layer bonded to the surface.
  • Lightweight and easy to use.
  • Allows floors to be tiled without the concern of causing noise pollution - the boards are designed to solve problems incurred by structural vibrations from impact sound (e.g. footsteps).
  • Reduces sound by up to 20 dB, and heat loss by up to 60%.
  • Load bearing capacity of up to 30 t/m².
  • The material will not shrink, degrade or become brittle.
  • Provides decoupling that allows lateral movement to be absorbed by the board and not, for example, by tiled flooring – so, the tiles don’t crack.
  • Meets local authority regulations for tiled bathrooms in shared apartments and flats.
  • Can be cut to size easily.
  • Can be used with underfloor heating wire.
  • Manufactured in accordance with ISO 9001 Quality Management Systems.

The SoundBoard will remove the solid link between where the impact sound happens (floor/ ceiling) with a layer of styrene-butadiene rubber (SBR) foam. The side with the sound attenuating layer will then effectively isolate the tiles and the tile backer board from the floor, so the impact sound vibrations cannot be transmitted into the room below.

General information


Extruded polystyrene (XPS)


600 x 1250 mm

Uniclass 2015

Pr_25_71_63_29 Extruded polystyrene (XPS) boardsPrimary


M40/27 Intermediate substrate

M40/470 Intermediate substrate

Specification data - Extruded polystyrene (XPS) boards Enhanced data

Third party product certification

BBA Certificate: 09/4687.

Compressive strength (minimum) at 10% compression

300 kPa.

Thermal conductivity (maximum)

0.04 W/m·K.


8 mm.

4.5 kg.

12 mm.

4.9 kg. Provides extra thermal insulation.

Face size (length x width)

600 x 1250 mm.

Product Reference


Weighted reduction in impact sound (on tiled surface)

20 dB.

Thermal resistance (R-value)

8 mm board: 0.19 m²K/W.

12 mm board: 0.30 m²K/W.

Environmental information

Country of material origin


Recycled content


Digital objects

Platform Compatible Version Certified to




Download now from NBS National BIM Library

Third party certifications

  • Certificate: 09/4687

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