SoundLay Plus Acoustic Underlay – High-Performance Floor Soundproofing (Used by West Sussex Soundproofing Ltd)
SoundLay Plus is a premium, high-density acoustic underlay designed to significantly reduce both impact noise and airborne sound transmission through timber and concrete floors. It is widely used in flats, home studios, commercial buildings, and anywhere a high-performance acoustic upgrade is required.
West Sussex Soundproofing Ltd regularly specifies SoundLay Plus as part of their professional floor soundproofing systems throughout Brighton, Hove, Worthing, Chichester and the wider Sussex region.
What Is SoundLay Plus?
SoundLay Plus is a 12mm thick, high-mass acoustic composite designed for use beneath overlay flooring. It is constructed as a laminated sandwich system combining:
- Two dense acoustic barrier layers
- A central 6mm acoustic foam damping core
This combination delivers an excellent balance of mass, resilience, and vibration absorption, making it one of the best-performing acoustic underlays for both domestic and commercial applications.
Key Benefits
✔ Excellent Impact Noise Reduction
Substantial reduction in footfall noise and structural vibration transfer.
✔ Improves Airborne Sound Insulation
The mass-loaded structure increases floor density, helping to reduce airborne noise such as voices, TV sound, and music.
✔ Very High Density for Its Thickness
At around 15kg per m², SoundLay Plus provides serious acoustic mass without dramatically increasing floor height.
✔ Flexible & Easy to Install
Cut with a knife, lay flat, and tape or bond joints depending on the system design.
✔ Suitable Under Many Floor Finishes
Works perfectly beneath:
- Laminate
- Engineered wood
- Timber floating floors
- Overlay boards (chipboard/MDF)
- Vinyl (when overboarded)
Technical Table – Thickness • Density • Acoustic Performance
| Property | SoundLay Plus |
|---|---|
| Product Type | High-density acoustic overlay underlay |
| Thickness | 12 mm |
| Density | Approx. 450–500 kg/m³ (very high mass) |
| Weight | Approx. 15 kg/m² |
| Structure / Build-Up | Two mass barrier layers laminated with a 6mm acoustic foam core |
| Impact Noise Reduction (ΔLw) | Typically 18–20 dB improvement depending on floor finish |
| Airborne Improvement (Rw Increase) | Typically +2–5 dB when used in a full acoustic flooring system |
| Best Used On | Concrete floors, timber floors, floating floors |
| Finish Compatibility | Laminate, timber, engineered wood, vinyl (with overboard) |
| Fire Rating | Class E (typical for heavy acoustic underlays) |
How West Sussex Soundproofing Ltd Installs SoundLay Plus
As the leading floor soundproofing specialists in Sussex, West Sussex Soundproofing Ltd follow an enhanced installation method for maximum performance:
1. Subfloor Preparation
A clean, level, rigid base is essential for optimum acoustic results.
2. Installation of SoundLay Plus
- Sheets are laid tightly together to prevent sound leakage.
- Joints may be taped or bonded depending on the system.
- Perimeter isolation strips are added where required.
3. Overboarding Layer
For most finishes, especially vinyl or laminate, West Sussex Soundproofing recommend:
- 9–12mm plywood
or - MDF / chipboard overlay
This stabilises the floor finish and ensures the acoustic system performs properly.
4. Final Floor Finish
Once overboarded, the chosen decorative flooring is installed.
This method ensures both impact and airborne improvements and delivers a robust, long-term acoustic flooring system.
Where SoundLay Plus Is Most Effective
✔ Flats & Apartments
Helps meet and improve upon building regulation acoustic standards.
✔ Home Recording Studios
Reduces vibration transfer from monitors, instruments and movement.
✔ Multi-Storey Homes
Stops noise travelling between floors.
✔ Office Fit-Outs
Reduces chair noise, walking noise and general workplace disturbances.
✔ Timber-Floor Constructions
Especially beneficial for lightweight floors where impact sound is usually worst.
Why Choose West Sussex Soundproofing Ltd?
West Sussex Soundproofing Ltd are highly experienced in:
✔ Acoustic underlays
✔ Overlay floor systems
✔ Timber and concrete floor soundproofing
✔ Studio-grade acoustic flooring builds
✔ Complete residential and commercial soundproofing
They have become the trusted and preferred soundproofing contractor across Sussex, delivering reliable results with professional-grade materials such as SoundLay Plus.
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