Yes – without proper insulation, much of the heat generated by your underfloor heating system will be lost downwards into the subfloor. Underfloor heating insulation boards help reflect heat upwards where it’s needed, improving both comfort and efficiency.
XPS insulation boards are ideal due to their high compressive strength, moisture resistance, and thermal insulation properties. They’re also lightweight and easy to install.
Absolutely. In fact, they’re especially recommended with electric systems to ensure quick heat-up times and minimise energy loss.
This depends on your subfloor and floor finish. Common thicknesses range from 6mm to 20mm. Thicker boards offer better insulation, but may slightly raise the floor height.