Celotex CW4000 Cavity Wall Insulation Board is a polyisocyanurate (PIR) insulation solution manufactured for use in partial fill cavity walls. Comprised of a PIR core sandwiched between low emissivity foil facings on both sides, these boards have a thermal conductivity of just 0.022 W/mK. This makes them a far more effective thermal cavity solution than either rock or glass wool insulation. These cavity insulation batts fit snugly in between cavity wall ties, and are perfect for use in new builds and extensions with a masonry wall. Celotex CW4000 is a BBA certified solution and is the leading brand in the market for PIR cavity wall insulation. Sized at 1200mm x 450mm, these boards are rigid, lightweight and easy to handle and install. They are sold in wrapped plastic packs.
