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👉 Check Latest PriceDescription Celotex XR4000 PIR Insulation Board is a versatile high-performance insulation solution suitable for various applications including pitched roofs, flat roofs, timber frame walls, floors, room-in-the-roof setups, and ceilings. Whether for new builds or renovations, these boards come in a wide range of sizes, catering to diverse project needs. Crafted with low emissivity foil facings and manufactured from rigid polyisocyanurate (PIR), this board ensures exceptional thermal insulation while prioritizing environmental consciousness. With BBA certification, you can trust in its high standards. Lightweight yet sturdy, it simplifies transportation, handling, and installation, offering reliability and longevity for your construction projects. Key Features: High-performance insulation boards that reduce building and renovating costs. Environmentally friendly manufacturing process with minimal climate impact. Tough, rigid yet lightweight insulation boards for easy installation. Excellent thermal performance with a thermal conductivity of 0.022 W/m.K. Sustainable building choice with a BRE Green Guide Rating of A.