Soundmass Acoustic Underlay

SOUNDMASS® Underlay is a new acoustic underlay that offers high level airborne and impact performance. The unique blue high mass layer adds 10kg of acoustic mass to your floor build up to improve airborne performance that reduces speech, music and television noise through your floor. 

The orange closed cell foam layer adds high level impact noise, reducing footfall and banging through the floor. The unique orange foam is closed cell and will recover to its original state after compression. 

SOUNDMASS® Underlay is a unique product that is fused together in the manufacturing process making it extremely durable. 

SOUNDMASS® Underlay is engineered for high performance with a strong focus on environmental responsibility and indoor air quality. Independently tested to international standards.

• PVC- and chloride-free
• Low odour and ultra-low VOCs – ideal for sensitive environments
• Made with over 50% recycled content to reduce carbon impact
• 100% recyclable
• Eco-friendly – free from SVHCs, including lead, halogens, and unrefined aromatic oils
• Low fire toxicity – burns cleanly without releasing harmful toxins
• Closed-cell foam structure – resistant to water and moisture

Installation

Carpet

SOUNDMASS® Underlay can be used beneath a carpet finish. When replacing a traditional underlay, you’ll need to install SOUNDMASS® Underlay perimeter strips around the room to accommodate carpet gripper rods. Lay the underlay up to the edge of these perimeter
strips. Install in a brick bond pattern for optimal performance. Bond the underlay to the subfloor using Elastorapid VS90 Adhesive, applied with a 3mm notched trowel. Spread the adhesive evenly across the area. Use SOUNDMASS® Underlay High Tac Tape to secure all joints before installing the carpet.

Wood or Laminate Floor Finish 

Installing SOUNDMASS® Underlay Under Wood or Laminate Flooring. SOUNDMASS®. Underlay can be installed beneath wood or laminate floor finishes. Ensure the subfloor is level, smooth, and clean before installation. Apply Elastorapid VS90 Adhesive with a 3mm
notched trowel, spreading evenly across the floor area. Bond the SOUNDMASS® Underlay directly to the subfloor in a brick bond pattern. Tape all joints with SOUNDMASS® High Contact Tape. Fill any perimeter gaps with an acoustic sealant. Over the underlay, install either:

• A 6mm ply or MDF board, or
• Jumpax Heat-Pak panels.

Once the additional layer is in place, your wood or laminate flooring can be installed on top.

SOUNDMASS® Underlay with an acoustic ceiling - Part E Compliant Floor/Ceiling Systems.

SOUNDMASS® Underlay is used as part of a floor and ceiling system designed to meet and exceed the requirements of Building Regulation Part E for sound insulation.
The system build-up includes:
• SOUNDMASS® Underlay over existing 22mm
timber floorboards
• Existing timber joists
• 100mm Rockwool RWA45 acoustic insulation between joists
• 5007 deep resilient bars at 300mm centres
• One layer of 15mm Soundbloc plasterboard
• One layer of 15mm Fireline plasterboard