Celotex is a multi-purpose insulation board that can be used around the home for insulating roofs, walls and floors. Celotex insulation boards are PIR, (polyisocyanurate), which is produced as foam and used as rigid insulation. This rigid core is usually sandwiched between two aluminium foil facings that are high performance, thus creating a tough, hard-wearing yet lightweight insulation board. Performance is high while reducing building or renovating costs. The way in which the boards are made is easy on the environment and has a low impact on global warming. This sheet also covers 2.88 meters squared.