Knauf DriTherm 37 125mm Cavity Insulation Slab

125mm Knauf DriTherm 37 Cavity Insulation Slabs are water-repellent Glass Mineral Wool slabs engineered for full-fill applications in masonry cavity walls. These slabs deliver excellent thermal performance across a range of construction projects. They are non-combustible and achieve the highest Euroclass A1 fire rating. Made with Knauf Insulation ECOSE® Technology bio-based binder.

Product specification

• Brand: Knauf®
• Model: DriTherm 37 - 125mm
• Thickness: 125mm
• Length: 1200mm
• Width: 455mm
• Dimensions: 1,200mm x 455mm x 125mm
• Board Coverage: 0.546m2
• Pack Coverage: 3.28m2
• R-Value: 3.35m2K/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, lowering fire propagation risks within the cavity.
2. BBA certified and water-repellent, enabling installation in all exposure zones, including extremely severe conditions.
3. 125mm slabs are precisely sized to fit between wall ties without needing retaining discs.

About

The 125mm Knauf DriTherm 37 Ultimate Cavity Insulation Slab is a water-repellent glass mineral wool product designed for complete-fill use in external masonry cavity walls. With thermal conductivity of 0.037W/mK, it provides reliable thermal insulation performance.

This cavity slab is highly durable, odourless, rot-resistant, non-hygroscopic, and vermin-proof. It resists fungal growth, mould, and bacterial colonisation.

Built with Knauf ECOSE Technology, these Cavity Wall Slabs deliver an excellent Euroclass A1 fire rating. BBA approved for all exposure zones including very severe areas, they suit buildings up to 12m in any exposure zone and multi-storey structures up to 25m high.

These insulation slabs contain no ozone-depleting substances or greenhouse gases. Knauf Glass and Rock Mineral Wool offer superior ease of installation compared to rigid boards. The Knauf DriTherm Cavity Insulation Slabs conform to substrate irregularities, bonding together to prevent air gaps and thermal bridging.

Durability

The 125mm Knauf DriTherm Slabs are odourless, rot-resistant, non-hygroscopic, vermin-resistant, and prevent fungal, mould, and bacterial growth.

Application

Intended for thermal insulation in masonry cavity external walls, these 125mm slabs are installed to fully fill the cavity. They are approved for buildings up to 12m high in any exposure zone (subject to BBA certification compliance) and suitable for multi-storey applications up to 25m in height.

Dritherm Cavity Wall Specifications

Info

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