Jablite Claymaster Clay Heave Protection 2400 x 1200mm 150mm (Pack of 4 sheets) is a specialised clay heave protection board designed to safeguard foundations from ground movement caused by clay soil expansion. Manufactured from expanded polystyrene, these boards offer reliable compressive strength and long-lasting durability, making them ideal for use in new builds or extensions. The dimensions of 2400 x 1200mm and a thickness of 150mm ensure effective coverage and protection. Jablite Claymaster is lightweight, easy to handle, and simple to install, providing an efficient solution for structural engineers and contractors seeking dependable clay heave protection.