XPS BOARD is an Extruded Polystyrene (XPS) rigid board used for thermal insulation. It is produced from general purpose polystyrene by the process of extrusion. These extruded sheets have a closed-cell structure and virtually no air-voids in between the cells. Globally XPS has been widely used for thermal insulation since the last 40 years. It is acknowledged to be one of the best 'value-for-money' thermal insulation materials
Most warm flat roof constructions consist of a structural deck with a vapor control layer, thermal insulation layer and waterproofing installed over. It is often described as a ‘conventional’ warm roof because it is a common solution, suitable for projects of all sizes – from small domestic to large commercial or industrial. The protection afforded to the insulation by the waterproofing layer means a wide range of insulation materials can be used, and the performance characteristics that make extruded polystyrene (XPS) the preferred choice for flat roofs