Knauf Dritherm 37 Mineral Wool Cavity Insulation Slab (All Sizes)

5.0 (1 Reviews) Write Review
product brand
Brand: Knauf Insulation
Country of Manufacture: United Kingdom
In Stock

Product Size: 1200mm x 455mm slab.

Product Code: KFDSCS
£13.86 (ex VAT)
£16.63 (incl VAT)
Please enter postcode to check delivery time.

Related Products

Knauf DriTherm 37 is a sustainable, environmentally friendly, rigid to semi-rigid, water-repellent glass cavity slab, designed for use in external full-fill masonry cavity walls. It has excellent thermal performance. They provide exceptional cavity wall insulation even in structures up to 12 metres tall in any exposure zone, as well as multi-story applications up to 25 metres tall.

Knauf DriTherm 37 is manufactured using Knauf Insulation's unique bio-based binder, ECOSE® Technology. The Dritherm cavity slabs are designed to easily fit between wall ties without the need for retaining discs. They can also be ‘knit’ together to eliminate air gaps between adjacent slabs, thus ensuring effective thermal insulation.

Product Specification:

  • Length: 1200mm
  • Width: 455mm
  • Thickness Available: 50mm, 75mm, 85mm, 100mm, 125mm 


Slabs per pack


Coverage Area/pack (m2)





















Key Features:

  • Knauf Dritherm 37 is a non-combustible product. They are rated A1 according to Euroclass 
  • The Dritherm cavity slabs offer exceptional thermal performance.
  • Cavity wall insulation slabs pose no threat to the environment. 
  • They are water repellent, odourless and non-hygroscopic products. 
  • Made with ECOSE Technology which means the product is soft to touch, has lower dust levels, Low VOCs, and is environment friendly.
  • The cavity wall insulation is water-repellant. The special ingredient used during the manufacturing process ensures this.
  • Easy to handle and install, lightweight, easy to cut.
  • The cavity slabs completely fill the cavity to avoid mortar snots and bridges.
  • Slabs are proportioned to fit between wall ties without retaining discs
  • British Board of Agrément certified for use in all exposure zones
  • The 455mm wide cavity slabs of Knauf Dritherm 37 perfectly fit the standard tie spacings.


  • Earthwool DriTherm 37 Cavity Slabs offer excellent cavity wall insulation and are ideal thermal insulation of masonry cavity external walls and are installed to fully fill or partially fill the cavity.
  • They are approved for use in buildings up to 12m high in any exposure zone and for use in multi-storey applications up to 25m in height.

Product Details:

  • Material: Glass mineral wool.
  • R-value: 2.7m2K/W
  • Thermal conductivity: 0.032 - 0.037 W/mK
  • Water Vapour Resistivity: 5.00MNs/g.m


  • Manufactured in accordance with BS EN 13162.
  • Conforms to BS 3533: 1981
  • BBA certified - 95/3212, allowing it to be used in buildings up to 12 meters tall in any exposure zone, as well as multi-story applications up to 25 metres tall
Average Customer Rating
Overall 5.0

Cookies help us deliver our services. By using this website, you agree with our use of cookies. Learn more