British Gypsum Glasroc H Tilebacker Square Edge 2400mm x 1200mm x 12.5mm -Glasroc H TILEBACKER is a high performance board specifically designed for use in wet areas such as bathrooms and kitchens. High levels of moisture and mould resistance, combined with superior dimensional stability make it the high performance alternative to plywood and cement boards reducing the risk of failure. (Pack 1)