Marmox SoundBoard 600mm x 1200mm x 6mm Acoustic Underlay
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Chat with Ask TradieCart, our AI specialistMarmox SoundBoard – Impact Sound Reduction Tile Backer
Marmox SoundBoard is a 6mm tile backer board that reduces the impact (footfall) noise transmitted from a tiled floor into the room below. It combines a waterproof XPS core, fibreglass-reinforced polymer cement faces, and a sound-attenuating SBR rubber foam layer bonded to one side. The rubber decouples the tiled surface from the substrate so sound waves have no medium to travel through, delivering an impact sound reduction of approximately 20 dB on a tiled floor.
Key Features
- Reduces impact (footfall) sound by ~20 dB on tiled floors
- SBR rubber foam underside isolates tile from substrate
- Fully waterproof XPS core – no plasticiser migration, won't shrink or become brittle
- Provides thermal insulation and decoupling (prevents tile cracking from lateral movement)
- Compatible with under-tile heating systems
- Lightweight, easy to cut with a knife or saw
- Ready to receive tiles after joints are taped
- Suitable for both concrete and timber substrates
Applications
- Multi-occupancy / multi-storey residential floors
- Shared apartments and flats
- Bathrooms and wet rooms above living spaces
- Hotels and serviced apartments
- Renovations requiring acoustic floor improvements
Technical Data
- Dimensions: 600mm × 1200mm
- Thickness: 6mm
- Material: XPS, polymer cement, fibreglass, SBR rubber foam
- Thermal conductivity: 0.034 W/mK
- Compressive strength (EN826): 300 kPa
- Weighted impact sound reduction DLw (ISO 140-8): 28 dB
- With tiled surface: ~20 dB impact sound reduction
- Waterproof: Yes
- Lifetime guarantee
Installation Overview
Fix the boards rubber-side down to the floor with a thin bed of flexible tile adhesive or Marmox MSP360. Leave ~4mm gap between the board edge and the wall, filled with a visco-elastic adhesive to prevent flanking sound. Tape the joints and tile as normal. When used under wood/laminate flooring, fix the cement face down so the rubber side faces up.
Marmox SoundBoard for floors
Marmox SoundBoard
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$37.00
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$40.00
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$220.00
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$260.00
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