BUYING GUIDE · UK
How to choose the right flooring underlay
The underlay you fit decides how warm, quiet and long-lasting your new floor feels — get it wrong and even the best plank will creak, dent or feel cold. This UK guide walks through the right underlay for engineered, solid, laminate and luxury vinyl floors, plus what changes when you have underfloor heating.
What matters for underlay & accessories in UK
- Underfloor heating: choose a low-tog underlay (≤1.0 tog) — high-tog foams trap heat and waste energy.
- Engineered wood on concrete: combined foam + DPM (damp-proof membrane) underlay protects against rising moisture.
- Solid wood: usually glued or secret-nailed direct to ply — only use a thin acoustic membrane, never thick foam.
- Laminate: a 3mm fibreboard or PE foam underlay gives the best footfall feel and reduces hollow sound.
- LVT / SPC vinyl: most click-vinyl needs a 1–1.5mm IXPE acoustic underlay — never standard wood underlay (too soft, voids warranty).
- Flats and upstairs rooms: look for at least 19dB impact-sound reduction to meet UK Building Regs Part E.
Typical UK use cases
Victorian terrace with UFH
1.5mm low-tog acoustic underlay under engineered oak — keeps heat output high and silences footfall.
First-floor flat in London
Acoustic combi underlay rated 21dB under laminate — meets Part E and stops complaints from below.
Kitchen click-vinyl
1mm IXPE underlay rated for SPC — corrects minor subfloor dips without compressing under appliances.
Nearby areas we cover
We fit underlay & accessories across UK and the surrounding area, including:
UK FAQs
- Do I need underlay with luxury vinyl?
- Only if the manufacturer allows it and you use a thin (≤1.5mm) IXPE underlay rated for vinyl. Standard foam will compress and void most LVT warranties.
- What tog rating is best for underfloor heating?
- Aim for 1.0 tog or lower across floor and underlay combined. Higher togs insulate the heat away from the room — exactly what you don't want.
- Can I reuse old underlay?
- No — old underlay compresses and loses its acoustic and thermal performance. Always fit fresh underlay with a new floor.
- Does underlay help with soundproofing?
- Yes. A good acoustic underlay reduces impact noise by 18–24dB, which is the difference between hearing footsteps clearly and barely at all downstairs.
Summary
Match the underlay to the floor type, the subfloor and the heating — those three choices decide warmth, sound and longevity more than any other accessory.
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