Heat Mat TTB Heat Mat Insulation Board is designed to minimise downward heat loss, improving the efficiency and warm-up time of any underfloor heating system. When 10mm boards are used beneath a 200W system the floor will normally heat up in as little as 20 minutes and they add very little build height for a great energy saving measure. The board is simple to install either by fixing with screws and washers to secure onto wooden floor bases or with tile adhesive for use on concrete, tile and similar floors. 4mm or 6mm boards are particularly suitable for areas where build height is at a premium and 20mm boards offer an excellent trade-off between build height, cost and energy efficiency. It is compatible with heating mats, under tile heating cable, flexHeat cable, 6mm heating cable and under laminate insulation boards.