75mm Knauf DriTherm 34 Cavity Insulation Slab

75mm 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 performance requirements across construction projects. They deliver non-combustible performance and achieve the premium Euroclass A1 fire rating. Made with Knauf Insulation ECOSE® Technology bio-based binder for sustainable performance.

Product specification

• Brand: Knauf®
• Model: DriTherm 34 - 75mm
• Thickness: 75mm
• Length: 1200mm
• Width: 455mm
• Dimensions: 1,200mm x 455mm x 75mm
• Board Coverage: 0.546m2
• Pack Coverage: 5.46m2
• R-Value: 2.21m2K/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 risk within the cavity space.
2. BBA certified and water-repellent, approved for all exposure conditions including extremely harsh coastal and industrial zones.
3. 75mm slabs are precisely sized to fit between wall ties without needing retaining discs.

About

The 75mm Knauf DriTherm 34 Ultimate Cavity Insulation Slab is a water-repellent glass mineral wool product designed for complete-fill applications in external masonry cavity walls. Offering a certified thermal conductivity rating of 0.034W/mK, it delivers reliable thermal insulation performance.

This 75mm cavity slab combines durability with practical benefits—it's odourless, rot-resistant, non-hygroscopic, and vermin-proof. It naturally resists fungal growth, mould, and bacterial colonisation.

Built with Knauf ECOSE Technology, these Cavity Wall Slabs achieve an excellent Euroclass A1 fire classification. BBA certified for all exposure zones including severe coastal areas, they're approved for buildings up to 12m in any exposure condition and for taller multi-storey structures up to 25m.

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

Durability

The 75mm DriTherm slabs offer odourless, rot-proof, non-hygroscopic performance with excellent vermin resistance and natural resistance to fungi, mould, and bacterial growth.

Application

Intended for thermal insulation in masonry cavity external walls, these 75mm slabs are installed to completely fill the cavity space. They're approved for buildings up to 12m in any exposure zone (subject to BBA certification compliance) and suitable for multi-storey applications reaching heights of 25m.

Dritherm Cavity Wall Specifications

Info

Browse our full Knauf Insulation range and refine by thickness or coverage using the left-hand filters. For product suitability advice on your project or bulk pricing quotations, contact us on +4402038839057, email sales@insulationbee, or use Live Chat - Best value Knauf Cavity Insulation in the UK.