These DriTherm® Cavity Slabs 32 provide a high-performance insulation solution for your exterior masonry cavity walls. Made from water-repellent glass mineral wool, they ensure superior thermal performance and are perfect for full-fill cavity walls. They are non-combustible with minimal risk of fire spreading through the cavity, eliminating the need for cavity barriers.
Achieving the highest Euroclass A1 rating for reaction to fire and manufactured using eco-friendly ECOSE® Technology with a unique bio-based binder, these DriTherm® slabs fit tightly between wall ties, making retaining discs redundant.
Features & Benefits: Knauf DriTherm 32 150mm Cavity Wall insulation Slab – 2.18m2 Pack
- Ideal for external full-fill masonry cavity walls
- Thermal conductivity of 0.032W/mK
- 1200mm length x 455mm width x 150mm thickness
- R-Value of 4.65m²K/W
- Four unfaced slabs with 2.18m² total coverage
- 5.00MNs/g.m water vapour resistivity
- Rot-proof, odourless and non-hygroscopic
- Does not sustain vermin
- Will not encourage the growth of mould, fungi or bacteria
- No ozone-depleting substances or greenhouse gases
Certified by the BBA (British Board of Agrément) for use in all exposure zones, including extremely severe areas, these slabs are suitable for buildings up to 12m high in any exposure zone and multi-storey structures up to 25m high. They will not transmit water to the inner leaf, and they resist moisture through capillary action across the cavity and from below the damp proof course level, deterring moisture transmission.
These DriTherm® Cavity Slabs are much easier to fit than rigid boards as they mould to the substrate’s minor imperfections and interlock to eradicate any air gaps, ensuring optimal performance in any application. They are lightweight, effortless to handle and cut to size with ease. For short-term protection, they come in polythene packs.
Standards & Certification
- Certified by TÜV Nord: Manufactured in accordance with BS EN 13162, ISO 50001 Energy Management Systems, ISO 14001 Environmental Management Systems and ISO 9001 Quality Management systems
- EPD Standard: EN 15804
- BBA Certificate No: 95/3212
- Green Guide Rating: A+
- Reaction to Fire: A1 Euroclass classification to BS EN 13501-1
- Awarded the DECLARE ‘Red List Free’ label: Free from any harmful chemicals listed on the Living Building Challenge (LBC) Red List
Please note:
- For long-term protection, it is advisable to store this Knauf insulation inside or cover it and keep it off the ground while on site. Exposure to the elements can cause a deterioration in its performance.





















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