Isover Cavity Wall Slab (CWS) 32 is a premium high-performance glass mineral wool insulation slab designed for full-fill masonry cavity wall applications. Manufactured by Isover, CWS 32 delivers outstanding thermal efficiency with a low thermal conductivity of 0.032 W/mK, helping reduce heat loss and improve overall building energy performance.
The semi-rigid slabs are designed to friction-fit between wall ties, ensuring fast installation and consistent thermal coverage. CWS 32 is water-repellent, breathable, and non-combustible, making it suitable for residential and commercial projects.
Each slab measures 1200mm x 455mm.
⚠ Brand may vary due to stock availability. Equivalent performance products may be supplied where necessary.
Available Sizes:
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100mm – 3.28m² per pack (6 slabs per pack)
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150mm – 2.18m² per pack (4 slabs per pack)
Key Features & Benefits:
✔ Excellent thermal conductivity – 0.032 W/mK
✔ Designed for full-fill cavity wall systems
✔ A1 non-combustible fire rating
✔ Water-repellent and vapour permeable
✔ Easy friction-fit installation
✔ Suitable for new build and refurbishment projects
Isover CWS 32 helps buildings meet UK Building Regulations for thermal performance and fire safety, providing a reliable long-term insulation solution.
