Celotex CW4000 is a versatile polyisocyanurate (PIR) insulation board designed for partial fill cavity wall applications, offering outstanding thermal performance with a conductivity of 0.022 W/m.K. Its low emissivity foil facing enhances thermal efficiency by reflecting heat within sealed cavity air spaces, helping achieve target U-values with reduced insulation thickness. Available in a range of thicknesses from 40mm to 100mm, the lightweight 1200 x 450mm boards are easy to handle, transport, and install. Featuring squared edges and a size tailored to fit standard wall tie spacing, these rigid boards simplify installation while ensuring a precise and effective fit within cavity wall systems. Certified by the British Board of Agrément (BBA certificate 16/5343), Celotex CW4000 is approved for use in partial fill cavity wall applications, provided it is installed and maintained according to the guidelines. This certification underlines its reliability and suitability for a wide range of construction projects. Whether you’re aiming to improve energy efficiency or meet stringent building regulations, Celotex CW4000 delivers exceptional performance in a practical and easy-to-use solution, making it a trusted choice for cavity wall insulation. Why Choose the Celotex CW4000 PIR Insulation Board? High performance insulation board Range of thicknesses available Excellent thermal performance Low emissivity foil facing Easy to transport and install BBA certified Product Specifications: Thickness: Select from dropdown Length: 1200mm Width: 450mm Please note: Celotex CW4000 should not be used in the external walls of buildings over 11 metres in height.
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