Marmox Soundboard

Marmox Soundboard is an impact sound reduction board designed for use beneath ceramic and porcelain tiled floors. It helps reduce footfall noise transferring into rooms below while also acting as a decoupling layer to protect tiles and grout.

By combining a resilient rubber-foam acoustic layer with an XPS insulation core, Soundboard creates a break between the tiled surface and the structural floor, improving both acoustic comfort and floor performance.

Key features

• Designed to reduce impact (footfall) sound through tiled floors
• Typical impact sound reduction of up to approximately 20 dB
• Decoupling effect helps reduce stress on tiles and grout
• Waterproof board suitable for bathrooms and wet areas
• Improves thermal comfort beneath tiled floors
• Lightweight, rigid, and easy to cut on site

Technical details

Where it is used

Marmox Soundboard is suitable for use beneath tiled floors in both residential and commercial environments, particularly where reducing impact noise is important.

• Flats and apartments
• Upper-floor rooms and living spaces
• Bathrooms and wet rooms
• Kitchens and general tiled areas
• Projects aiming to improve acoustic performance

Installation notes

• Ensure the subfloor is clean, dry, level, and structurally sound
• Install boards rubber-side down using a flexible tile adhesive or suitable acoustic adhesive
• Leave a perimeter isolation gap of approximately 4 mm at walls and upstands
• Fill perimeter gaps with a flexible or visco-elastic sealant
• Tape all board joints before tiling
• Tile as normal using flexible adhesive and grout

Frequently asked questions