The Tile Backer Boards by Ezheat are specially designed for wetrooms in bathrooms. Made from a foam base board with a cement outer layer, these XPS boards have a thermal conductivity of 0.027 W/m.K, making them ideal for underfloor heating. The grey boards are moisture-resistant, lightweight, and cement coated, ensuring durability and easy installation. Measuring 1250 x 600mm, these professional tile backing boards are suitable for both walls and floors in your bathroom. I have 3 boxes plus 5 singles 70 per box
eBay