Thermopanel Tile Backer Boards The dimensions of each board are 0.48m² (800mm x 600mm). Thermopanel Tile Backer boards are specifically designed for two primary purposes:- ---As a first class heat insulation for underfloor heating systems ---As a superior waterproof surface to fix wall or floor tiles. ---Tile backer boards are particularly suited to underfloor heating mats and under tile heating cable applications. ---Will accept even the heaviest wall tiles, unlike plasterboard.(correct installation method must be followed) ---Installation below underfloor heating systems on an existing un-insulated concrete or timber sub-floor will greatly reduce heat up time and running costs. ---Our Boards will reduce the warm up time of the heating and reduce your electricity bill.