Home > Companies > ThermoSphere > ThermoSphere Foil

Underfloor electric heating foil for use with timber and laminate floors.

Features and benefits:

  • Double layer of foil: Protects the heating element and provides an even spread of heat to the floor finish above.
  • Accessible exposed cable loops: Simplify cut and return installation and provide abrasion protection for the heat element after installation is complete.
  • Continuous earth braid protection: Runs the entire length of the heating cable, making it suitable for installation in bathrooms (subject to appropriate RCD protection and compliance with local building standards).
  • Low profile cold tail: Extra-malleable, 4 mm-thick cold tail allows for easier installation and can be concealed within the insulation.
  • Range of control options including wireless and remote (specified separately).


Suitable for use as underfloor heating with:

  • Engineered timber and laminate floor finishes.
  • Engineered timber finish on an insulated screed, floating floor.
  • Low tog carpet and underlay finish, floating floor (combined maximum tog rating: 2.5).
  • Vinyl bonded floor tiles, floating floor.
  • Bonded timber finish and acoustic layer, floating floor.
  • Fully bonded engineered timber solution.
  • Bonded engineered timber on foil faced insulation.

Consult manufacturer's literature for examples of floor build-ups.

Related literature

The following content references this product:

Standard product features


0.5 m.


Cushioning overlay:

  • Size (l x w x t): 1200 x 500 x 5 mm.
  • Coverage (as supplied in standard packs of ten: 6 m².

Cushioning underlay:

Size (l x w): 15 x 1 m (roll).


Consult manufacturer's literature for details of mesh size, output (Wattage) and resistance.


- Aluminium tape:

Size (l x w): 50 m x 50 mm.

- Cement overlay board:

  • Size (l x w): 1200 x 600 mm.
  • Coverage: 0.72 m².

- Fixing tape:

Size (l x w): 50 m x 50 mm.

- HDF overlay board:

  • Size (l x w x t): 1200 x 600 x 7 mm.
  • Coverage (as supplied in packs of four): 2.88 m².

NBS Specification

NBS Create logo
This product is associated with the following NBS Create clause:
90-40-35/495 Flexible mat electric heating elements

NBS Specification

NBS Buliding logo
This product is associated with the following NBS clauses:

Product specification

An important note about specifying





+44 (0) 800 019 5899

Product reference

ThermoSphere Foil


[ ______ ]


140 W/m²

Cushioning overlay

Manufacturer recommends inclusion in every installation.
[Not required]

Cushioning underlay

Manufacturer recommends inclusion in every installation.
[Not required]


To be specified separately.
[Not required]


[Acoustic insulation board]
[Acoustic insulation mat]
[Aluminium tape]
[Cement overlay board]
[Fixing tape]
[HDF overlay board]

Manufacturer details

Bridge House,
Pattenden Lane,
Kent, TN12 9QJ
Tel +44 (0) 800 019 5899
Fax +44 (0) 870 041 2140
NBS Plus
NBS National BIM Library