Knauf Dritherm 37 100mm Standard Cavity Slab is a high-performance glass mineral wool insulation solution designed for masonry cavity external walls. Manufactured by Knauf Insulation, Dritherm 37 provides excellent thermal efficiency, fire resistance, and long-term durability.
With a thermal conductivity of 0.037 W/mK, this semi-rigid slab delivers reliable heat retention while allowing the structure to breathe. Designed for friction-fit installation between wall ties, it ensures quick and secure fitting on site.
Each slab measures 1200mm x 455mm, with 12 slabs per pack, covering 6.55m².
⚠ Brand may vary due to stock availability. Equivalent performance products may be supplied where necessary.
Product Specifications:
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Thickness: 100mm
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Dimensions: 1200mm x 455mm
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Coverage per Pack: 6.55m²
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Pieces per Pack: 12
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Material Type: Glass Mineral Wool
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Thermal Conductivity: 0.037 W/mK
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Density: 17kg/m³
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Fire Rating: A1 Non-Combustible
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Edge Type: Square
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Facing: Glass Mineral Wool
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Weight: 1.7kg/m²
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Manufacturer’s Reference: 715831
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Product Range: Knauf Dritherm 37 Cavity Slab
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Brand: Knauf (Brand may vary due to stock availability)
Key Benefits:
✔ Excellent thermal performance (λ 0.037 W/mK)
✔ A1 non-combustible fire rating
✔ Water-repellent and vapour permeable
✔ Easy friction-fit installation
✔ Suitable for masonry cavity walls
✔ Compliant with UK Building Regulations
Order online today from SB Building Supplies for competitive trade pricing and fast UK delivery.





