Celotex XR4200 General Purpose PIR Insulation Board is designed to deliver high-performance thermal insulation for walls, floors, and roofs in both residential and commercial buildings. Measuring 2400 x 1200 x 200mm, this rigid Polyisocyanurate (PIR) insulation board is lightweight yet robust, making it easy to handle and install. With low thermal conductivity, the Celotex XR4200 helps improve energy efficiency while fitting seamlessly into a variety of construction applications. Its foil facings enhance durability and moisture resistance, ensuring long-lasting performance in demanding environments. This general-purpose insulation board meets current building regulations and is suitable for new builds or refurbishments.