Thermosphere Electric Underfloor Foil Mat 140W/m² Thermofoil PRO™ Pack

£41.62£449.44 Incl. VAT

Free delivery over £150 (Exceptions Apply)
Next Day Available | 30 Day Return Policy
Further Delivery Information


Thermosphere Electric Underfloor Foil Mat (Thermofoil PRO™), designed for high-performance underwood, carpet and vinyl floor finishes. Our foil system is perfect for bedrooms, living and dining rooms, meaning you can now enjoy the warmth and comfort only electric underfloor heating can bring, not just in your kitchen and bathroom but in all rooms of your home.

ThermoSphere Foil is in league with our other floor heating products with regards to innovation. In 2015 it became the first fully earthed foil electric underfloor heating system in the UK to feature easily accessible cable loops designed to assist with an easier installation.

Thermosphere Electric Underfloor Foil Mat 140W/m² packs include the following:

  • Heating Foil
  • Underlayboards
  • Cushioning and Acoustic Overlay Boards

Floor Construction Requirements:

Engineered timber finish on an insulated screed, floating floor – Add materials included in Kit.

Low tog carpet and underlay finish, floating floor – HDF Overlay Board will need to be added separately.

Vinyl bonded floor tiles, floating floor- HDF Overlay Board will need to be added separately. Acrylic Adhesive (supplied by others)

Bonded timber finish and acoustic layer, floating floor – Sound Proofing (supplied by others), Cement Overlay Board to be added separately. Acrylic Adhesive (supplied by others)

Fully bonded engineered timber solution – Acrylic Adhesive (supplied by others)

Bonded engineered timber on foil-faced insulation – Cement Overlay Board to be added separately. Acrylic Adhesive (supplied by others)

Please see the installation Guide Below for more information. 

Foil Matt Technical Data

  • Width: 500mm
  • Headed Width: 450mm
  • Max Thickness: 1.5mm
  • Max Temperature: 29oC
  • Cable fixing: Concealed In Foil
  • Cable Loop: Exposed

Cushioning Overlay Technical Data

  • Thickness / Tolerance: 1.2mm (±0.1mm)
  • Width: 1m (excl. overlap)
  • Length: 15m
  • Roll size: 1m x 15m / 15m²
  • Materials: PE foil, Extruded PE foam
  • Colour: Red and grey
  • Density: 150kg/m³
  • Thermal resistance Rm: 0.014 m2 K W-1
  • TOG rating: 0.14 TOG
  • Impact sound reduction: 21 dB ΔLw
  • Compressive strength: 200 kPa
  • Comressive creep: 40 kPa

Cushioning Underlay Tchnical Data

  • Board size (mm): 1200 x 500 x 5 (0.6m²)
  • Pack size: 10 boards (6m²)
  • Density: 40 kg/m³ (EN ISO 845)
  • Weight: 190 g/m³
  • Footfall sound reduction: ≈19dB
  • Melting temperature: 90°C
  • Thermal conductivity: 0.0279 W/mK
  • Thermal resistance: 0.215 m² k/W
  • Water absorption: 0.06 vol %

Electric Underfloor Heating Foil Kits140W/m² Installation Guide

Installation Guide – Foil


Data Sheet Foil System



Thermosphere Foil System Kit

Delivery Information

We have multiple delivery options

  • Next day carrier
  • 2-3 day carrier
  • Click & Collect from store


The cost of the carriage will be displayed before your final checkout. Free delivery is available on most items for orders over £150, exceptions do apply.


  • Orders will only be dispatched and delivered on weekdays.
  • Orders for the next working day delivery must be placed before 2 pm, this gives us time to pick and pack before the carrier arrives to collect.
  • We aim to dispatch all carrier delivered items within 48hrs, and all items delivered on our own transport within 5 days, Monday to Friday.
  • A dispatch email will be sent when your goods leave us, if delivery is by the carrier, this email will include tracking information. If your order is delayed for any reason, we will contact you.


We pride ourselves on our customer service but mistakes can happen. If you receive an incorrect or faulty item, please notify us within 30 days to arrange a refund, return or exchange.

Thermosphere Foil System Kit