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Heat Mat 20mm Thickness L=1200mm x W=600mm Thermal Insulation Boards

Product Code: TTB-020-0004
Brand: Heat Mat

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RRP: £133.00 ex VAT
£ 109.73 ex VAT or £ 131.68 inc VAT
Free Delivery on this product!

These thermal insulation boards are ideal for use where underfloor heating is to be laid onto an uninsulated subfloor or into a room such as a conservatory with high heat loss. An underfloor heating system laid on to thermal insulation boards will react faster and will run more efficiently than a system laid directly onto a concrete base.


  • m² Coverage per Pack - 3.60m²
  • Thickness (mm) - 20mm
  • Length (mm) - 1200mm
  • Width (mm) - 600mm
  • Boards per Box - 5
  • Product Code - Heat Mat TTB-020-0004

When choosing the thickness of boards most suitable for your installation you should consider a number of factors. Firstly, the build height that you have available to you may limit you to, for example, a maximum board thickness of 6mm. Additionally, if you are using the boards to secure a wooden base you should always use 10mm thick boards.

If, however, you have the available build height we would recommend using our 20mm insulation boards as these provide a very good trade off between cost and insulation efficiency providing a UValue(W/m²k) of 1.35. Our 10mm boards have a U Value of 2.70 and our 6mm boards a value of 4.50.

Heat Mat Lifetime Warranty


  • Free (2-5 working days) delivery on UK Orders over £75.00 ex. VAT
  • Free collection from our Hampton Hill (Middlesex) or Chessington (Surrey) Branches
  • Saver delivery (2-5 working days) - £5.00 ex. VAT

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