Soundlay Plus 12mm Acoustic Underlay
12mm Acoustic Floor Underlay for Impact and Airborne Noise Reduction
Soundlay Plus 12mm Acoustic Underlay is a dense acoustic floor mat designed to reduce impact noise and help improve airborne sound insulation through floor structures.
Each sheet measures 1200mm x 1200mm x 12mm and covers 1.44m². The 12mm thickness makes it a practical option where you need acoustic improvement but want to keep floor height build-up lower than a thicker acoustic mat.
Soundlay Plus 12mm uses a 2-ply laminated construction, combining a 3mm acoustic barrier mat with 9mm closed-cell PE foam. This helps reduce impact noise from footsteps and movement while also adding mass to support airborne sound reduction through the floor build-up.
It is suitable for timber and concrete floor applications and is commonly used in flats, houses, offices, bedrooms, living rooms, studios and refurbishment projects where footfall noise and sound transfer through floors need to be reduced.
For best results, Soundlay Plus 12mm should be installed as part of a complete acoustic floor treatment. Perimeter isolation, tight joints, suitable floor finish detailing and flanking noise control are important. Do not rely on the matting alone to solve all sound transfer issues.
Key Features
- 12mm acoustic floor underlay
- Helps reduce impact noise from footsteps and movement
- Can help improve airborne sound insulation through floors
- Lower build-up than thicker 15mm acoustic mats
- Suitable for timber and concrete floor applications
- 2-ply laminated acoustic construction
- 3mm acoustic barrier mat bonded to 9mm closed-cell PE foam
- Flexible, easy to cut and simple to install
- Suitable for domestic and commercial projects
- Can be used below carpet and selected hard floor finishes
- Each sheet covers 1.44m²
- Useful for flats, bedrooms, living rooms, offices and refurbishment projects
Technical Specifications
Product: Soundlay Plus 12mm Acoustic Underlay
Sheet size: 1200mm x 1200mm
Thickness: 12mm
Coverage: 1.44m² per sheet
Weight: approximately 12.24kg per sheet
Weight per m²: approximately 8.5kg/m²
Construction: 2-ply laminated acoustic mat
Build-up: 3mm acoustic barrier mat and 9mm closed-cell PE foam
Main use: Floor impact and airborne noise reduction
Suitable floor types: Timber and concrete floors
Typical applications: Flats, houses, offices, bedrooms, studios, refurbishments and floor upgrades
Final floor finishes: Carpet directly; laminate, vinyl or timber subject to correct system build-up
Acoustic Performance
Soundlay Plus 12mm can help reduce impact noise and improve airborne sound performance when installed as part of a suitable tested floor and ceiling construction.
Published acoustic figures should only be treated as system performance, not standalone product performance. Actual results will depend on the full floor build-up, ceiling construction, floor finish, workmanship and flanking noise control.
Typical published system figures for Soundlay Plus 12mm are 48dB airborne and 49dB impact, based on a tested construction. These figures should not be treated as a guaranteed result for every installation.
Installation Notes
Install Soundlay Plus 12mm over a clean, dry and level floor surface. Sheets should be laid tightly together with butt joints and no gaps between boards.
Use suitable perimeter isolation around walls, skirting lines, door thresholds, pipe penetrations and fixed structures. Rigid contact points can create flanking paths and reduce acoustic performance.
For carpet installations, isolate carpet grippers from the structural floor where required. For laminate, vinyl or engineered timber finishes, check whether a suitable timber board layer is required above the acoustic mat before installing the final floor finish.
Do not mechanically fix through the acoustic layer unless the full system specification allows it. Fixings through the resilient layer can create rigid bridges and reduce soundproofing performance.
FAQ
What is Soundlay Plus 12mm used for?
Soundlay Plus 12mm is used to reduce impact noise and help improve airborne sound insulation through floor constructions.
What size is each sheet?
Each sheet measures 1200mm x 1200mm x 12mm and covers 1.44m².
How heavy is each sheet?
Each sheet weighs approximately 12.24kg, equal to around 8.5kg/m².
Can it be used under carpet?
Yes. Soundlay Plus 12mm can be used below carpet. Carpet grippers should be isolated where required to avoid rigid contact points.
Can it be used under laminate or engineered wood?
Yes, but only with the correct supporting layer or floor system. Do not assume laminate or engineered timber can be laid directly on top without checking the build-up.
Can it be used on concrete floors?
Yes. Soundlay Plus 12mm can be used on concrete floors, subject to correct floor preparation and the final floor finish.
Can it be used on timber floors?
Yes. Soundlay Plus 12mm can be used on timber floors as part of a suitable acoustic floor treatment.
Is 12mm or 15mm better?
The 12mm version is better where floor height is limited. The 15mm version is heavier and better suited where stronger acoustic treatment is required and the extra thickness can be accommodated.
Does it meet Part E?
It can help a floor system meet acoustic requirements, but it should not be sold as a standalone Part E guarantee. Performance depends on the full floor and ceiling construction, installation quality and flanking noise control.
