THERMALSTREAM^® in the real world

ThermalStream in a multimillion pound renovation

ThermalStream is designed for use with underfloor heating, and was featured in this multi-million pound renovation, to unlock the full potential of the underfloor heating system. Delivering comfort and performance without compromise. This specialist carpet underlay is engineered specifically for spaces with underfloor heating, giving homeowners and specifiers a solution that balances heat transfer efficiency with underfoot comfort.

Flame‑retardant foam

Safety and build quality are core to ThermalStream’s design. The underlay incorporates flame‑retardant foam, which enhances fire safety performance and meets industry standards for safer internal use. Its tested and certified construction gives installers and specifiers confidence that performance and compliance go hand in hand.

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Optimised Heat Transfer

Unlike many traditional underlays for underfloor heating, which are thinner (around 8 mm) and can feel hard underfoot, ThermalStream is 10 mm thick while still allowing heat to pass through efficiently. It features precision‑punched perforations that accelerate heat transfer from the heating system into your flooring without trapping warmth beneath the surface.

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Designed for Underfloor Heating

Whether you’re renovating a home with a new underfloor heating installation or installing new carpet and underlay to an existing system, ThermalStream offers a premium underlay solution that unlocks greater heat efficiency, comfort and acoustic performance, making it the go‑to underlay for use with underfloor heating systems.

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Installation gallery

Frequently Asked Questions

What is ThermalStream carpet underlay?

ThermalStream is a specialist carpet underlay designed specifically for use with underfloor heating systems, offering enhanced heat transfer, comfort and acoustic performance under carpet.

How does ThermalStream improve heat transfer with underfloor heating?

ThermalStream improves heat transfer by using precision‑punched holes that allow heat from underfloor heating systems to move more efficiently through the underlay to the carpet surface without compromising on comfort.

Is ThermalStream comfortable under carpet?

Yes, ThermalStream is 10 mm thick, providing a comfortable feel under carpet while still optimising heat transfer for underfloor heating systems.

Does ThermalStream help reduce noise?

Yes, ThermalStream underlay provides acoustic performance with up to 46 dB noise reduction, helping to minimise impact and airborne sound in carpeted rooms with underfloor heating.

Can ThermalStream be used with all types of underfloor heating?

Yes, ThermalStream is suitable for common underfloor heating systems, including electric (dry) and hydronic (water‑based), making it a versatile choice for most modern heated floor installations.

Try ThermalStream for yourself today.

We’re so confident in our underlays that we are offering free samples to anyone who requests them. You can request up to three sample booklets delivered to your door free of charge for any of our underlays, which each have their own sample booklet. Let us know you’d like to try ThermalStream today!

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