The specially manufactured cement polymer coated board gives the ideal surface to lay your tiles directly. It should be used especially in wet areas such as bathrooms and kitchens where walls and floors are particularly exposed to moisture. ThermaSheet is easy to use and can be fixed using cement based flexible tile adhesive - solvent based or ready mixed adhesives MUST NOT be used. Alternatively ThermaSheet can be fixed using screws and washers. Once fixed, ThermaSheet provides a perfect surface on which to apply decorative finishes such as tiles, synthetic renders, decorative plaster etc. FOR UNDER FLOOR HEATING INSULATION. Without insulation, up to 40% of heat generated by an underfloor heating system could be lost through the sub-floor. Extruded polystyrene is one of the most efficient insulation materials available, meaning minimal heat transfer to adjacent materials. Installing ThermaSheet beneath an underfloor heating system dramatically reduces both heat loss and the cost of running domestic heating systems. Offering excellent thermal properties,using ThermaSheet in conjunction with underfloor heating improves the efficiency of the heating system, enabling a warm floor to be achieved in as little as 20 minutes, as opposed to hours, if ThermaSheets are not used. The cost savings of using ThermaSheet can be significant. ThermaSheet also offers high thermal insulation that can benefit every room in the house by significantly reducing your heating loss - for high thermal insulation use a minimum of 20mm boards butted closely together. Flat Tile Backer Board. Width: 600mm. Height: 1200mm. Depth: 50mm. Warranty: 10 years. Fixings NOT Included