The Trueheat (140W/m2) very thin underfloor heating mat kit is designed for installation on concrete or wood floors under laminate or engineered wood floors. The underfloor heating mat is 0.5m wide and can be shaped to fit any free floor area which is at least 10-15% larger than the size of the mat. *Please check that your floor finish is suitable for underfloor heating before purchasing. The mat consists of a fibreglass mesh with a very thin heating cable fixed to the mesh, covered with an aluminium foil. The underfloor heating mats are available in a wide range of sizes and an unlimited amount of heating mats can be used to heat any floor area. *Please Note* - The 11m² kit consists of 2x Heating Mats. All kits 13m² and above will also consist of 2x Heating Mats.