Description
Thermal Break and Expansion Space for Every Heated Floor
ThermoSphere Perimeter Insulation Foam is fitted around the edge of a heated floor to provide a thermal break and the room for expansion that tiled and floating floor build-ups need. Without it, heat can escape into the surrounding walls and skirting rather than the room, and the floor has nowhere to expand as it warms — this simple strip solves both problems in one product.
Key Benefits
- Provides a thermal break around the perimeter of a heated floor to prevent heat loss into the building fabric
- Creates the expansion gap tiled and floating floor build-ups need as they heat and cool
- Lightweight and easy to cut and work with on site
- Supplied on the roll, so you only take what each job needs
Applications
Fitted by tilers, screeders and underfloor heating installers around the perimeter of any room receiving electric underfloor heating, before screeding or floor finishing begins. Suitable for tiled floors, floating floors and any heated floor build-up in bathrooms, kitchens, wetrooms and living spaces.
Performance & Features
Made from lightweight PE foam with a low thermal conductivity, ThermoSphere Perimeter Insulation Foam reduces heat loss at the floor edge while its compressible structure absorbs the natural expansion and contraction of tiled and floating floors as they heat up and cool down, helping to prevent cracking and tenting at the perimeter.
Compatibility
Suitable for use with all ThermoSphere electric underfloor heating cable, mesh and foil systems, and with any tiled, screeded or floating floor build-up. Cuts easily to height with a trade knife to suit skirting and floor build-up depth.
ThermoSphere is manufactured in the UK and comes with a lifetime warranty — buy with confidence from a specialist UK underfloor heating and tiling supplier, backed by Millcot's trade support.
Key Features
- Thermal break around the heated floor perimeter
- Room for expansion in tiled and floating floor build-ups
- Lightweight and easy to cut and work with
- 80mm width x 50m roll length
- Lifetime warranty
Technical Specifications
- Code: PIF-50-050
- Material: PE foam
- Size: W 80mm x L 50m
- Thickness: 5mm
- Density: 20-25kg/m³
- Thermal conductivity: 0.040 W/m.K (at 10°C, ISO 8301)
- Compressive strength: 0.02N/mm² (at 25%), 0.07N/mm² (at 50%)
- Fire class: B3
- Colour: White
- Country of origin: UK
- Warranty: Lifetime
What's Included
One roll of ThermoSphere Perimeter Insulation Foam, 80mm wide x 50m long x 5mm thick, ready to cut to length and fit around the room perimeter.
Downloads
FAQs
Why do I need perimeter insulation foam with underfloor heating?
It provides a thermal break to stop heat escaping into the walls, and the expansion gap that tiled and floating floors need as they heat and cool.
Where is it fitted?
Around the perimeter of the room, against the wall or skirting, before screeding or floor finishing.
How much do I need?
Measure the perimeter of the room in metres — one 50m roll will cover most rooms, with several rooms often covered by a single roll.
Can it be cut to height on site?
Yes, it's lightweight and easy to cut to the required height with a sharp trade knife.
Is it suitable for tiled and floating floors?
Yes, it's suitable for both tiled and floating floor build-ups over underfloor heating.
Does it work with all ThermoSphere heating systems?
Yes, it's suitable for use with all ThermoSphere electric underfloor heating cable, mesh and foil systems.