Underfloor Heating Insulation Boards

The main difference is thermal resistance and height, 10mm gives better insulation so less heat is lost into the subfloor, while 6mm keeps the floor build-up lower. If you have a concrete ground floor or want maximum heat retention choose 10mm; the ProWarm 10mm XP‑PRO at 1200mm is an example. If you're retrofitting and must keep thresholds or door clearances, the 6mm ProWarm XP‑PRO or Backer‑Pro is a sensible low‑profile option. The price gap is small, so weigh warmth gains against any height restrictions.

Yes, one of the options is specifically a tile/underfloor tile board: the ProWarm 6mm Backer‑Pro is described as an underfloor and tile insulation board, and the product filters show a tile‑suitable option. The rigid foam lends a stable, insulated layer beneath tiles and helps your heating system keep tiles warm. For larger tiled areas you might prefer the dedicated tile board rather than a generic concrete‑only board.

The ProWarm Profoam Underlay Insulation pack covers 10m² and contains 20 boards, so each board in that pack covers 0.5m². Board lengths in our range are mainly 1200mm with one at 850mm, so check the length when calculating cuts and joins. a 12m² bathroom would need two 10m² packs (you'd round up) or the equivalent number of individual boards.

our range lists two boards specifically for concrete floors, one board suitable for concrete, timber and tiled floors, and one for tiled floors. If you have a timber subfloor choose the product labelled for timber/concrete/tiled use; for a poured concrete slab the concrete‑specific XP‑PRO boards are appropriate. Match the board's suitability label to your subfloor to ensure compatibility and stable performance.

Yes, rigid insulation boards reduce heat loss into the substrate so your underfloor heating warms the room more efficiently and reaches temperature faster. A thicker board, such as the 10mm XP‑PRO, will retain more heat than a 6mm board, which is helpful on cold concrete slabs. You'll feel warmer underfoot and may need the heating on for shorter periods, especially in rooms with concrete subfloors.