Knauf DriTherm 37 150mm Cavity Insulation Slab

150mm Knauf DriTherm 37 Cavity Insulation Slabs are water-repellent glass mineral wool products engineered for full-fill installation in masonry cavity walls. These slabs deliver reliable thermal performance across a range of construction applications. They are non-combustible and achieve the highest Euroclass A1 fire rating. Manufactured with Knauf Insulation ECOSE® Technology bio-based binder for superior performance.

Product specification

• Brand: Knauf®
• Model: DriTherm 37 - 150mm
• Thickness: 150mm
• Length: 1200mm
• Width: 455mm
• Dimensions: 1,200mm x 455mm x 150mm
• Board Coverage: 0.546m2
• Pack Coverage: 4.37m2
• R-Value: 4.05m2K/W
• Thermal Conductivity: 0.037 W/mK
• Vapour Resistivity: 5.00MNs/g.m.
• Density: 27kg/m3
• Material: Glass Mineral Wool
• Profile: Ultimate Cavity Slab
• Building Regulations: Class '0'
• Fire performance: Euroclass A1 (non-combustible)
• Finish: Unfaced
• Applications: Masonry cavity walls
• ECOSE Technology: Yes
• Features: Non-combustible ǀ Water-repellent
• Manufacturer: Knauf DriTherm®

ADVANTAGES

1. Non-combustible full-fill insulation removes the requirement for cavity barriers, significantly lowering fire spread risk within the cavity space.
2. BBA-approved and water-repellent, making it ideal for all exposure conditions, including extremely harsh coastal and weather-exposed areas.
3. 150mm slabs are precisely sized to fit between wall ties without requiring retaining discs, simplifying installation.

About

The 150mm Knauf DriTherm 37 Ultimate Cavity Insulation Slab is a water-repellent glass mineral wool product for complete-fill use in external masonry cavity walls. It delivers proven thermal performance with a certified thermal conductivity rating of 0.037W/mK.

This 150mm cavity slab combines durability with practical benefits—it's odourless, rot-resistant, non-hygroscopic, and vermin-proof. It naturally resists fungal, mould, and bacterial growth without additional treatments.

Built using Knauf ECOSE Technology, these Cavity Wall Slabs deliver outstanding Euroclass A1 fire performance. BBA-certified for all exposure zones including severe coastal areas, they're approved for buildings up to 12m in any zone and multi-storey structures reaching 25m in height.

These slabs contain no ozone-depleting substances or greenhouse gases. Knauf glass and rock mineral wool products install more easily than rigid alternatives. The Knauf DriTherm Cavity Insulation Slabs conform to uneven surfaces, bonding together to eliminate air pockets and thermal bridging issues.

Durability

The 150mm Knauf DriTherm Slabs are odourless, rot-resistant, non-hygroscopic, vermin-resistant, and prevent fungal, mould, and bacterial colonisation.

Application

Intended for thermal insulation in masonry cavity external walls, 150mm DriTherm Slabs are fitted to completely fill the cavity space. They're approved for buildings up to 12m high in any exposure zone (subject to BBA certification compliance) and suitable for multi-storey buildings up to 25m in height.

Dritherm Cavity Wall Specifications

Info

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