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The Knauf 125 mm DriTherm Cavity Slab 32 (2.18 m²) is a high-performance full-fill cavity wall insulation slab designed to deliver excellent thermal efficiency with a low lambda value of 0.032 W/mK. It is ideal for modern masonry construction where low U-values and improved energy performance are required to meet current Building Regulations.
Manufactured by Knauf Insulation using water-repellent, non-combustible glass mineral wool, DriTherm Cavity Slab 32 provides reliable insulation while remaining breathable and resistant to moisture. The 125 mm thickness makes it well suited to wider cavity wall constructions, enabling designers and contractors to achieve demanding U-value targets without complex partial-fill systems. Supplied in packs covering 2.18 square metres, the slabs are lightweight, easy to handle and quick to install on site.
Knauf DriTherm full-fill cavity wall insulation
Lambda value: 0.032 W/mK for high thermal performance
125 mm thickness for achieving low wall U-values
Water-repellent and breathable glass mineral wool
Non-combustible with excellent fire performance
Supplied in packs covering 2.18 m²
Full-fill cavity wall insulation
External masonry walls requiring low U-values
New-build housing and residential developments
Wide cavity wall construction
Low-rise residential and commercial buildings
Low lambda value supports improved wall U-value performance
Helps reduce heat loss and improve building energy efficiency
Water-repellent fibres resist moisture ingress
Slabs friction-fit securely within cavities
Lightweight and easy to cut for fast installation
Product Type: Cavity Wall Insulation Slab
Manufacturer: Knauf Insulation
Insulation Type: Glass Mineral Wool
Product Range: DriTherm Cavity Slab 32
Thickness: 125 mm
Thermal Conductivity (Lambda): 0.032 W/mK
Coverage per Pack: 2.18 m²
Application: Full-Fill Cavity Wall Insulation
The Knauf 125 mm DriTherm Cavity Slab 32 is an ideal solution for projects targeting low U-values and high thermal performance in cavity walls. With its 0.032 W/mK lambda value, water-repellent properties and non-combustible mineral wool construction, it delivers long-term energy efficiency, safety and compliance for modern buildings.
