Celotex XR4150 General Purpose PIR Insulation Board is a high-performance thermal insulation solution, designed for use in walls, floors, and roofs. This Celotex insulation board measures 2400 x 1200 x 150mm and features rigid polyisocyanurate (PIR) core with low emissivity foil facings on both sides, helping to maximise energy efficiency. Its lightweight yet durable construction makes handling and installation straightforward, while its excellent thermal conductivity reduces heat loss in residential and commercial buildings. Suitable for new builds and refurbishments, the Celotex XR4150 insulation board provides reliable moisture resistance and long-lasting performance.