Knauf DriTherm 34 125mm Cavity Insulation Slab

125mm Knauf DriTherm 34 Cavity Insulation Slabs are water-repellent Glass Mineral Wool slabs engineered for full-fill masonry cavity walls. These slabs meet varied thermal requirements across building projects. They are non-combustible and achieve the premium Euroclass A1 fire rating. Manufactured with Knauf Insulation proprietary ECOSE® Technology bio-based binder.

Product specification

• Brand: Knauf®
• Model: DriTherm 34 - 125mm
• Thickness: 125mm
• Length: 1200mm
• Width: 455mm
• Dimensions: 1,200mm x 455mm x 125mm
• Board Coverage: 0.546m2
• Pack Coverage: 3.28m2
• R-Value: 3.68m2K/W
• Thermal Conductivity: 0.034 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, minimising fire spread risk within cavities.
2. BBA certified and water-repellent, approved for all exposure conditions including extremely severe environments.
3. 125mm Cavity Slabs fit precisely between wall ties without needing retaining discs.

About

The 125mm Knauf DriTherm 34 Ultimate Cavity Insulation Slab is a water-repellent glass mineral wool product for full-fill external masonry cavity walls. Featuring a thermal conductivity rating of 0.034W/mK, it delivers reliable thermal performance.

This 125mm cavity slab offers exceptional durability alongside being odourless, rot-resistant, non-hygroscopic, and vermin-proof. It naturally resists fungal, mould, and bacterial growth.

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

These insulation slabs contain no ozone-depleting substances or greenhouse gases. Knauf Glass and Rock Mineral Wool installation is straightforward compared to rigid board alternatives. The Knauf DriTherm Cavity Insulation Slabs conform to uneven surfaces, bonding together to prevent air gaps and thermal bridging.

Durability

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

Application

Intended for thermal insulation in masonry cavity external walls, 125mm DriTherm Slabs provide complete cavity fill. They're authorised for buildings up to 12m in any exposure zone (subject to BBA certification compliance) and suitable for multi-storey buildings up to 25m height.

Dritherm Cavity Wall Specifications

Info

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