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Description
The 125mm Knauf Dritherm 32 Glass Mineral Wool Cavity Wall Insulation – 43.6m² (20 Packs) is a high-performance cavity wall insulation solution designed for use in external masonry cavity walls with a 125mm cavity. Manufactured from glass mineral wool, these full-fill insulation slabs provide excellent thermal performance, helping to reduce heat loss and improve energy efficiency in residential and commercial buildings.
Knauf Dritherm 32 cavity slabs are designed to friction-fit between wall ties, providing a secure and effective insulation layer during cavity wall construction. With a thermal conductivity of 0.032 W/mK and a thermal resistance of 3.90 m² K/W, these slabs offer reliable insulation performance while helping create comfortable indoor environments.
This bulk pack of 20 packs is ideal for new builds, extensions, and larger construction projects. The insulation provides excellent fire safety with a Euroclass A1 reaction to fire rating and is manufactured to high quality standards, being BBA certified, EUCEB certified, and compliant with BS EN 13162.
Key Features
High-performance 125mm glass mineral wool cavity insulation
Designed specifically for 125mm external cavity wall applications
Full-fill cavity insulation slabs for improved thermal efficiency
Suitable for new builds, extensions, and large construction projects
Friction-fit installation between wall ties
Excellent thermal conductivity of 0.032 W/mK
Provides thermal resistance of 3.90 m² K/W
Euroclass A1 fire resistance classification
BBA certified for quality assurance
Complies with BS EN 13162 standards
EUCEB certified mineral wool insulation
Manufactured under ISO 50001, ISO 14001, ISO 45001, and ISO 9001 management systems
Helps reduce heat loss and improve building energy performance
Dimensions & Pack Size
Product Type: Cavity Wall Insulation Slab
Insulation Material: Glass Mineral Wool
Thickness: 125mm
Length: 1200mm
Width: 455mm
Coverage per Pack: 2.18m²
Pack Quantity: 20 Packs
Slabs per Pack: 4 Slabs
Total Coverage: 43.6m²
Thermal Conductivity: 0.032 W/mK
Thermal Resistance: 3.90 m² K/W
Fire Rating: Euroclass A1
Certification: BBA Certified, BS EN 13162, EUCEB Certified
DELIVERY INFORMATION
FAST RELIABLE UK DELIVERY STANDARD DELIVERY - 1 TO 3 WORKING DAYS FREE DELIVERY ON ORDERS OVER £500 PALLET DELIVERY AVAILABLE NEED IT URGENTLY? CONTACT US FOR EXPRESS OPTIONS
