Best Flooring Underlay — PU Foam (2026)
7 flooring underlay matching material “PU Foam”, hand-picked from UK Amazon listings.
Not sure which one to pick? Read our Best Flooring Underlay UK (2026) guide.
PU Foam Flooring Underlay provides a comfortable and supportive layer beneath your hard flooring – ideal for fitted carpets, luxury vinyl tiles (LVT), or even as a standalone floor covering. This dense PU foam offers superior cushioning compared to traditional felt underlays, reducing impact noise and improving the overall feel of your room. Its closed-cell structure also resists moisture absorption, making it suitable for areas prone to dampness like hallways and bathrooms.
Specifically designed for flooring applications, this PU foam underlay is available in a range of thicknesses to suit different floor types and personal preferences. It’s easy to cut and fit, requiring minimal preparation before installation, saving you both time and effort. This robust material helps to distribute floor loads evenly, protecting your finished floor from damage.
The open-cell structure of the PU foam allows for excellent thermal insulation, contributing to a more comfortable indoor environment. Furthermore, this underlay’s density provides added soundproofing benefits, reducing noise transmission between rooms. It's a practical and versatile choice for enhancing both the comfort and acoustic performance of your floor.
#1 Pick
PU Foam 10mm Thick Carpet Underlay Roll by 247Floors- PU Foam
- 10mm
£54.95
Pros
- Thick 10mm PU foam adds noticeable cushioning and warmth underfoot
- Strong review base for a dedicated flooring-brand underlay
- Helps with sound and thermal insulation under carpet
Cons
- Heavier roll than thinner underlay options, so needs help to move and lay
£42.99
Pros
- Large 15m² roll covers bigger rooms without multiple orders
- 8mm PU foam gives solid cushioning under carpet
- Straightforward roll-out fitting
Cons
- Smaller review count than more established underlay brands
#3 Pick
10mm Thick PU Carpet Underlay Rolls, Choose from 30 Sizes, 10m² Total Area, UK Manufactured- PU Foam
- 10m²
£39.99
Pros
- UK-manufactured underlay with a strong review base
- Choice of 30 sizes makes it easy to match odd room dimensions
- 10mm thickness gives a quality, cushioned feel underfoot
Cons
- Larger sizes are bulky to handle and store before fitting
#4 Pick
Cloud 9 Cumulus 11mm PU Carpet Underlay Roll, 10m² Total Area, UK Manufactured- PU Foam
- 10m²
£69.99
Pros
- UK-manufactured underlay with a strong 4.6-star rating across 106 reviews
- Thick 11mm PU foam gives a plush, cushioned feel underfoot
- Covers a full 10m² in one roll
Cons
- Premium price compared with basic foam underlays
#5 Pick
Cloud 9 Cumulus 11mm PU Carpet Underlay Roll, 15m² Total Area, UK Manufactured- PU Foam
- 15m²
£85.00
Pros
- Excellent 4.8-star rating from UK buyers
- Larger 15m² roll suits bigger rooms in one order
- Thick, luxurious PU foam feel with good sound insulation
Cons
- Bulky roll, so check delivery access before ordering
#6 Pick
12mm Thick PU Carpet Underlay, 15 Square Metre Roll, UK Manufactured, Hard Wearing- PU Foam
- 15m²
£48.99
Pros
- 4.7-star rating from over 1,600 UK reviews
- 12mm thickness gives a plush, cushioned feel underfoot
- Full 15m² roll covers most standard rooms in one order
Cons
- Bulky roll, so check delivery access before ordering
#7 Pick
FloorPro 10mm Carpet Underlay - DIY Roll 1m x 5m - PU Foam With Sound And Insulation - Underfoot Comfort Cushion Padding Underlayment - Ideal For Stairs- PU Foam
- 1m x 5m
£27.50
Pros
- 4.8-star rating from UK buyers
- 10mm PU foam gives strong underfoot cushioning and sound insulation
- 1m x 5m roll works well for stairs and smaller rooms
Cons
- 5m² roll size means larger rooms need more than one roll
FAQ
What is PU foam flooring underlay made from?+
PU Foam Flooring Underlay is primarily composed of polyurethane (PU) foam, which is known for its cushioning properties. The exact formulation may vary slightly between manufacturers but typically includes a blend of polyols and isocyanates that are chemically reacted to create the resilient foam structure.
How thick should I choose PU foam underlay?+
The ideal thickness depends on your flooring type and desired level of comfort. For LVT, 12-15mm is often recommended; for carpets, 8-10mm may be sufficient. Consider the subfloor’s existing height when making your decision.
Can PU foam underlay be used with laminate flooring?+
Yes, PU Foam Flooring Underlay can absolutely be used with laminate flooring. Its cushioning properties help to absorb impact and reduce noise transmission, creating a more comfortable surface beneath the laminate planks.
Does PU foam underlay need any preparation before installation?+
Generally, minimal preparation is required. Ensure your subfloor is clean, dry, and level. You may want to apply a self-levelling compound if necessary to correct minor imperfections.
Is PU foam underlay suitable for damp areas?+
While designed to resist moisture absorption due to its closed-cell structure, it’s still advisable to use in areas with moderate humidity. Avoid prolonged exposure to standing water and consider a moisture barrier for particularly damp locations.
How does PU foam underlay compare to felt underlay?+
PU Foam Flooring Underlay offers significantly superior cushioning and impact absorption compared to traditional felt underlay. Felt is less dense, doesn’t provide as much noise reduction, and is more susceptible to moisture damage.
What tools do I need to install PU foam underlay?+
You'll typically need a utility knife or scissors for cutting the underlay to size, a measuring tape, and possibly a roller for ensuring it’s properly bonded to your flooring. A straight edge can also be helpful.
Can I cut PU foam underlay to fit around obstacles?+
Absolutely! PU Foam Flooring Underlay is designed to be easily cut. Use a sharp utility knife or scissors and take care when cutting to avoid damaging the surrounding floor surface.
How does PU foam underlay affect soundproofing?+
The dense structure of PU Foam Flooring Underlay effectively absorbs impact noise, significantly reducing footfall sounds and minimizing transmission between floors. This contributes to a quieter and more comfortable living space.
What is the lifespan of PU foam flooring underlay?+
With proper installation and maintenance, PU Foam Flooring Underlay can last for 10-20 years or longer. Regular cleaning and avoiding excessive weight loads will help prolong its life.