This standard is concerned with extruded polystyrene insulation boards of not less than 10 mm thick for use at temperature up to 750C max. in building and civil engineering applications in combination with other materials. It is applicable to cellular polystyrene boards including flame retardants and other additives. The boards shall be in the form of either integral skinned boards where the skins are formed during the manufacturing process, or boards where the integral skins have been removed.
GSO 1015:1998 history
1998GSO 1015:1998 EXPANDED POLYSTYRENE INSULATION BOARDS PART 2: EXTRUDED BOARDS