85 mm DriTherm Cavity Slab 37 (4.37 M2)

The Knauf 85 mm DriTherm Cavity Slab 37 (4.37 m²) is a high-quality full-fill cavity wall insulation slab designed to deliver reliable thermal performance in masonry construction. With a lambda value of 0.037 W/mK, it helps reduce heat loss through external walls and supports improved U-values, making it suitable for energy-efficient residential and light commercial buildings.

Manufactured by Knauf Insulation using water-repellent glass mineral wool, DriTherm Cavity Slab 37 combines effective thermal insulation with breathability and moisture resistance. The 85 mm thickness is ideal for narrower cavity wall constructions where consistent insulation performance is required. Supplied in packs covering 4.37 square metres, the slabs are lightweight, easy to handle and quick to install, ensuring efficient on-site application for new-build projects.

Key Features

• Knauf DriTherm full-fill cavity wall insulation

• Lambda value: 0.037 W/mK

• 85 mm thickness for improved wall U-values

• Water-repellent and breathable glass mineral wool

• Non-combustible with excellent fire performance

• Supplied in packs covering 4.37 m²

Typical Applications

• Full-fill cavity wall insulation

• External masonry walls in new-build housing

• Narrow cavity wall construction

• Low-rise residential buildings

• Light commercial developments

Performance & Workability

• Supports improved wall U-values and energy efficiency

• Water-repellent fibres resist moisture ingress

• Slabs friction-fit securely within cavities

• Lightweight and easy to cut on site

• Designed for fast, efficient installation

Technical Specification

• Product Type: Cavity Wall Insulation Slab

• Manufacturer: Knauf Insulation

• Insulation Type: Glass Mineral Wool

• Product Range: DriTherm Cavity Slab 37

• Thickness: 85 mm

• Thermal Conductivity (Lambda): 0.037 W/mK

• Coverage per Pack: 4.37 m²

• Application: Full-Fill Cavity Wall Insulation

Why Choose Knauf 85 mm DriTherm Cavity Slab 37?

The Knauf 85 mm DriTherm Cavity Slab 37 offers a dependable and cost-effective solution for achieving improved U-values and thermal performance in narrower cavity wall constructions. Its 0.037 W/mK lambda value, moisture resistance and non-combustible mineral wool construction make it a trusted insulation choice for compliant, energy-efficient building projects.