Knauf DriTherm 32 125mm Cavity Insulation Slab

125mm Knauf DriTherm 32 Cavity Insulation Slabs are water-repellent glass mineral wool slabs engineered for full-fill masonry cavity walls. Delivering outstanding thermal performance across various construction projects, these slabs are entirely non-combustible and achieve the premium Euroclass A1 fire rating. Manufactured with Knauf Insulation ECOSE® Technology bio-based binder for enhanced sustainability.

Product specification

• Brand: Knauf®
• Model: DriTherm 32 - 125mm
• Thickness: 125mm
• Length: 1200mm
• Width: 455mm
• Dimensions: 1,200mm x 455mm x 125mm
• Board Coverage: 0.546m2
• Pack Coverage: 2.18m2
• R-Value: 3.91m2K/W
• Thermal Conductivity: 0.032 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, substantially lowering fire spread risks within the cavity space.
2. BBA certified and water-repellent performance ensures suitability for all exposure conditions, including extremely challenging environments.
3. 125mm slabs are precisely sized to fit between wall ties without needing retaining discs.

About

The 125mm Knauf DriTherm 32 Ultimate Cavity Insulation Slab delivers water-repellent glass mineral wool insulation for complete-fill applications in external masonry cavity walls. Featuring a verified thermal conductivity of 0.032W/mK, this product provides reliable thermal efficiency.

This 125mm DriTherm 32 Cavity Slab combines durability with practical benefits—it's odourless, rot-resistant, non-hygroscopic, and vermin-proof. The material actively resists fungal growth, mould, and bacterial colonisation.

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

These insulation slabs contain zero ozone-depleting substances and no greenhouse gases. Knauf glass and rock mineral wool excel in installation ease compared to rigid board alternatives. The Knauf DriTherm Cavity Insulation Slabs conform to substrate irregularities, bonding together to prevent air pockets and thermal bridging.

Durability

The 125mm Knauf DriTherm Slabs deliver odourless, rot-proof, non-hygroscopic performance with excellent vermin resistance and natural protection against fungal, mould, and bacterial development.

Application

Intended for thermal insulation in masonry cavity external walls, 125mm DriTherm Slabs are fitted to fully occupy the cavity space. They're approved for buildings up to 12m in any exposure zone (subject to BBA certification compliance) and work equally well in multi-storey applications up to 25m height.

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 or bulk pricing enquiries, contact us on +4402038839057, email sales@insulationbee, or use Live Chat for competitive Knauf Cavity Insulation rates.