A polystyrene hard foam core and coated with a glass-fibre mesh reinforced cement based mortar layer on both sides. Nicobond Tile Backer Board is lightweight, very robust, easy to cut, easy to install, waterproof and is available in numerous sizes and thicknesses providing solutions for many tiling and building situations. It can be used as a direct replacement for gypsum plaster board or timber wall boards in wet areas, overlay damaged boards or provide additional protection to similar wall boards. Eco friendly – Zero Ozone layer depletion 87kg/m2 weight loading Insulating properties Class O fire rated High U value Improves undertile heating Nicobond Tile Backer Board does not use either HCFC or CFC gases during manufacture and has an Ozone Depletion rating of zero.