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Marmox (UK) Ltd Third party certifications:
  • ISO 14001 Environmental Management Systems

    Certificate type

  • ISO 9001 Quality Management

    Certificate type

  • EPD


    Certificate type

A rigid Impact Noise and Thermal Insulation panel designed to be tiled on.

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It provides Impact Sound and Thermal insulation to wooden and concrete floors allowing them to be tiled without causing noise pollution in the room below. 


It is a foam-cored, cement covered waterproof tile backer boards for floors providing decoupling and thermal insulation. This version is made specifically for floors above other living spaces such as in apartments and hotels to enable the floors to be tiled because it has an additional rubber layer which stops impact sound (footfall noise) on a tiled floor being heard in the room or flat underneath.

Features and benefits:

  • Waterproof
  • Thermal Insulation (thermal conductivity 0.04W/mK)
  • Absorbs impact sound.
  • 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



High density extruded polystyrene (XPS)




1250 mm


600 mm


8 mm

Warranty description



Pr_25_71_63_29 Extruded polystyrene (XPS) boardsPrimary


M40/27 Intermediate substrate

M40/470 Intermediate substrate

Specification data - Extruded polystyrene (XPS) boards

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.

Sustainability data

Contains Red List materials


Country of material origin


Country of product manufacture


Recycled content

10 %


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Platform Compatible Version




Third party certifications

ISO 14001 Environmental Management Systems

ISO 14001 Environmental Management Systems

Marmox ISO 14001

ISO 9001 Quality Management

ISO 9001 Quality Management

Marmox ISO9001



Environmental Product Declaration - Marmox Board


DoP for Marmox Multiboard

DoP for Marmox Multiboard

UK version (UKCA) Declaration of Performance

UK version (UKCA) Declaration of Performance

Marmox Bathrooms & Wetroom Systems Brochure

Marmox Bathrooms & Wetroom Systems Brochure

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