Acoustic Underlay for Laminate Flooring — UK Buyer's Guide
Written by our acoustic insulation specialist — 15+ years experience supplying soundproofing to UK homeowners, developers and contractors. About our experts.
Choosing acoustic underlay for laminate flooring is more critical than most people realise. Laminate is rigid and resonant — without the right underlay, it amplifies impact noise rather than attenuating it. This guide explains what to look for and which products work best.
Why Laminate Floors Need Acoustic Underlay
Laminate flooring consists of a dense fibreboard core with a photographic layer and wear surface. Unlike solid timber or carpet, it has no inherent acoustic damping. Installed directly onto a concrete or timber subfloor, laminate amplifies footstep noise significantly — the hollow, clunky sound common in lower-end installations.
The correct acoustic underlay serves three functions:
- Decouples the laminate from the structural floor (impact isolation)
- Provides a compressible layer that absorbs impact energy
- Compensates for minor subfloor irregularities (up to 3mm)
Key Technical Requirements for Laminate Underlay
Compression Resistance
Laminate floor joints are not designed to bridge gaps. If the underlay compresses excessively under furniture or foot traffic, the floor joints can gap or peak. Specify an underlay with a compression modulus suited to the expected load — high-density rubber excels here.
Thickness
For laminate, underlay thickness of 3–6mm is optimal. Thicker underlays can cause joint stress in click-lock systems. Always check the laminate manufacturer's maximum underlay thickness specification — typically 3–6mm for most systems.
TOG Rating
If underfloor heating is present, the combined TOG of underlay plus laminate must stay within the UFH manufacturer's limit (commonly ≤ 0.15 m²K/W or ≤ 2.0 TOG combined).
Best Acoustic Underlays for Laminate Flooring
3mm Recycled Rubber Acoustic Underlay — 54 dB ΔLw
Our top recommendation for laminate flooring. The 3mm profile keeps floor raise minimal, the 54 dB ΔLw impact reduction is excellent, and the high-density rubber provides outstanding compression resistance. Compatible with most UFH systems and suitable across both concrete and timber joist subfloors.
6mm Recycled Rubber Acoustic Underlay — 74 dB ΔLw
Where maximum acoustic performance is required and the laminate manufacturer permits up to 6mm underlay, the 6mm rubber is the clear choice. At 74 dB ΔLw, it delivers unmatched impact noise reduction. Ideal for upper-floor flats where noise transmission to the flat below is the primary concern.
Installation Tips for Laminate + Acoustic Underlay
- Lay underlay perpendicular to laminate boards — minimises joint alignment over underlay joints.
- Tape all underlay joints before laying laminate.
- Check the laminate's click-lock manufacturer guidelines for maximum underlay thickness and TOG.
- Do not use multiple underlays stacked — one quality acoustic underlay outperforms two thin foam layers.
- Maintain expansion gaps as specified by the laminate manufacturer — typically 8–10mm at all walls.
What About Built-In Underlay?
Many laminate products come with a factory-fitted foam underlay. This is almost always a basic acoustic foam with minimal impact reduction capability. For acoustic performance that matters, remove or ignore the built-in foam and specify a dedicated acoustic rubber underlay instead.
Shop acoustic underlay for laminate: 3mm Rubber (54 dB) | 6mm Rubber (74 dB) | Full Range