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The Celotex CW4100 Cavity Wall Insulation Board measures 1200m x 450 x 100mm and comes in a pack of six sheets. These insulation boards offer excellent thermal efficiency, making your home more energy-efficient and reducing heating costs. Designed for cavity wall applications, each board is easy to handle and install. The Celotex CW4100 is known for its durability and reliable performance. Ideal for builders and DIY enthusiasts alike, this product ensures long-lasting insulation for residential and commercial projects. Invest in quality insulation that provides comfort and savings year-round.. Celotex CW4100 Cavity Wall Insulation Board 1200mm x 450 x 100mm - 3.24m2 Pack PIR