20mm Tekwarm Foiled 400 KPA UFH Board | 1200mm x 600mm | 150mm Centres for 16mm Pipe

Yes. Grooved for 16mm pipe at 150mm centres, which covers most standard residential water-based UFH setups. It's designed for solid ground floors laid over a DPM. If your system uses 12mm pipe, or you'd prefer 200mm centres to save on pipe runs, there are three other variants in this range for those combinations.so

1200mm x 600mm x 20mm, 0.72 m² per board, 400 kPa EPS core. The foil face reflects heat upward into the room rather than letting it dissipate into the substrate below. It also stays flat across the surface and clear of the grooves, so pipe drops in cleanly. An overlay board is required before your floor finish goes down.

Yes. The foil surface isn't suitable for direct tiling or flooring. An overlay board goes down first, then your floor finish on top. Factor the extra layer into your build-up height before you start. The foil is there for thermal performance, not as a finished deck.

Solid ground floor installations in new builds and retrofits where you want a stronger board than standard 300 kPa spec. The 400 kPa core suits projects with heavier loading, such as commercial-light use, open-plan areas with dense furniture, or anywhere the installer wants more confidence underfoot. At 16mm pipe and 150mm centres it delivers solid output as a primary heat source in well-insulated rooms.

Start with pipe size and match it to your system spec. 16mm is the standard choice for most residential systems and handles longer runs better. 12mm suits smaller zones or packaged kits that come with 12mm throughout. On spacing, 150mm centres is the safer default if you haven't got a heat loss calculation. More output per m², and a better fit for any room where heat demand is uncertain. 200mm centres uses less pipe and costs less to install, but works best in well-insulated rooms that don't need to push hard to stay warm.