ThermRiteâ„¢ Joisted Floor Insulation Panel – 2 Grooves at 200mm centres

From £9.91 inc VAT
£8.26 ex VAT
Choose Options This product has multiple variants. The options may be chosen on the product page

ThermRiteâ„¢ Joisted Floor Insulation Panel – 3 Grooves at 115mm centres

From £10.25 inc VAT
£8.54 ex VAT
Choose Options This product has multiple variants. The options may be chosen on the product page
Routed Underfloor Heating Insulation for Wood and Laminate Floors

Our overlay underfloor heating insulation panels are designed for wood and laminate floors that can be floated directly on top. Choose from high-output ThermRite PRO boards in 16mm or 20mm, foil-covered boards from 18mm to 60mm, or foil panels for fitting between joists at 400mm centres.

Our overlay underfloor heating insulation panels are designed for wood and laminate floors that can be floated directly on top. Choose from high-output ThermRite PRO boards in 16mm or 20mm, foil-covered boards from 18mm to 60mm, or foil panels for fitting between joists at 400mm centres.

Which Underfloor Heating Insulation Board Do I Need?

Selecting the right underfloor heating insulation panel depends on your floor finish and installation type. All options on this page are suitable for wood or laminate floating floors, with boards designed for high efficiency and simple fitting.

  • 16mm & 20mm ThermRite PRO Boards – High compressive strength with 150mm pipe centres, these routed insulation boards are ideal for overlay systems. They provide excellent heat transfer and can be used under a wide range of interlocking floor finishes.
  • 18mm to 60mm Foil-Covered Boards – Designed for maximum output and efficiency, the foil layer reflects and spreads heat evenly across the room. Suitable for larger projects or where additional insulation depth is required.
  • Between-Joist Foil Panels – Available in 2-groove and 3-groove formats, these fit neatly between 400mm centred joists beneath the floor deck. A great option for suspended timber floors where you want underfloor heating without raising the floor height.

All boards feature high-output 150mm pipe centres for efficient heat distribution. Whether you are renovating with overlay panels or fitting foiled between joist boards, these systems provide a complete, reliable solution for water underfloor heating beneath wood or laminate floors.