Knauf Dritherm 37 Cavity Slab

The Knauf Dritherm 37 Cavity Slab 100mm is a premium glass mineral wool insulation designed for use in masonry cavity walls. Offering exceptional thermal performance, non-combustibility, and easy installation, it is ideal for full-fill cavity applications across all exposure zones.

Key Features

Excellent Thermal Performance: Provides energy efficiency with a thermal conductivity of 0.037 W/mK
Full Fill Insulation: Prevents mortar snots and cold bridges for a continuous insulating layer
Non-Combustible: A1 Euroclass Reaction to Fire rating for outstanding fire safety
Water Repellent: Manufactured with a water-repellent additive for superior moisture resistance
Easy Installation: Friction-fits between wall ties without the need for retaining discs
BBA Approved: Certified by the British Board of Agrément for use in all exposure zones
Reliable Coverage: Slabs are pre-sized to suit standard wall tie spacing, enhancing installation speed

Specifications

Specification	Detail
Thickness	100mm
Dimensions per Slab	1200mm (L) x 455mm (W)
Pack Coverage	6.55m²
Thermal Conductivity	0.037 W/mK
Fire Rating	Euroclass A1 (BS EN 13501-1)
Water Resistance	Water-repellent additive included
Installation	Friction-fit between wall ties
Certification	BBA Approved
Boxed Weight	11.0kg
Commodity Code	6806100000
Country of Origin	Great Britain

Frequently Asked Questions

Q: Is this suitable for high-exposure areas?
A: Yes, it is BBA approved for all exposure zones, including severe weather areas.

Q: Can it be used in both new build and retrofit applications?
A: It is primarily designed for new build cavity walls, though may be used in retrofit applications with suitable design considerations.

Q: Does it require additional fire protection?
A: No, it carries an A1 Euroclass fire rating, the highest level of non-combustibility.