Add-on · In Stock

Underfloor Heating Insulation (Therm-All)

Therm-All insulation pushes heat up into the room instead of down into the subfloor. A 10m² pack at just 6mm thick with a built-in moisture barrier. It is acoustic insulation, thermal insulation and a 1000-gauge damp proof membrane in one, so the heat goes up into the room instead of down into the subfloor.

£53.50per 10m² pack · free UK delivery over £150

Sends heat up, not down
Faster warm-up
Built-in moisture barrier
6mm ultra-low profile
10m² per pack

🇬🇧 Free UK delivery over £150 ♻️ 30% more efficient 📏 Ultra-low 6mm 🔧 Easy to fit

Specification

Coverage

10m² per pack

Thickness

6mm

Moisture barrier

Built in

Efficiency gain

30%

Profile

Ultra-low

Delivery

Free UK delivery over £150

Why insulate under your heating

Without insulation a chunk of your heat disappears downwards. Therm-All sits under the Ribbon and reflects the heat up where you want it, which means the floor warms faster and costs less to run.

At 6mm it barely changes your floor height.

Underfloor heating insulation FAQs

Do I need insulation under underfloor heating?

It is strongly recommended. Therm-All pushes the heat up into the room instead of down into the subfloor, and it is acoustic insulation, thermal insulation and a 1000-gauge damp proof membrane in one 6mm layer.

How much insulation do I need?

Match it to your heated floor area. Each pack covers 10m².

Does it add much height?

No, it is only 6mm thick so it barely changes your floor height.

Not sure how much you need?

Use the free Room Designer to map your floor and get the exact insulation and Ribbon you need, or talk to Russell for a hand.

Design your room free Go to the shop