ProWarm™ XP-PRO Insulation Boards are specifically designed for use with our electric underfloor heating systems on concrete/screeded floors. 1 board covers 0.72m2 / boards are 1200 x 600mm. XP-PRO Insulation Boards are also used as a high quality insulation for our underwood heating systems, these boards are available in 6mm, 10mm, 20mm, 30mm & 50mm thickness. High compressive strength (30tonnes / m2), light weight, high efficiency and low cost make this thermal board an ideal choice when fitting heating on to a poorly insulated concrete or screed base. If using with the underwood heating aluminium foil system they can be simply laid onto the surface in a staggered pattern. For undertile systems this product must be fixed down using our flexible tile adhesive. NOTE: These boards are NOT suitable for use on a wooden subfloor under tiles. For any further information, please get in touch. These boards are fully approved by Ultra Tile and are manufactured in the UK by DOW.