XPS 20mm Grooved Cement Coated XPS Panels (Minimum Order 50 boards) (Based on quantity of boards ordered, your order will arrive either by parcel, or palletised. If palletised, delivery is usually 1 working day) Ideal for Water Underfloor Heating 16 / 15 mm Pipe Each board covers 0.72 sqm The Extruded Polystyrene(XPS) Insulation - is known worldwide for exceptional long-term insulation performance on foundations, walls, roofs, underfloor and more. (Minimum Order 50 boards) This insulation board is manufactured from high density XPS 300kPa which is thermally insulating, lightweight, waterproof and faced with a reinforced cement coating. The panels provide a quick and easy solution for the placement of pipework for domestic and commercial underfloor heating applications.