Knauf Dritherm 37 - Mineral Wool Cavity Insulation Slab

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product brand
Brand: Knauf Insulation
Country of Manufacture: United Kingdom
In Stock
Product Code: KFDSCS
Est. Delivery: 2-3 Working Days
Shipping cost displayed in basket
£20.06 (ex VAT)
£24.07 (incl VAT)

Dritherm by Knauf Insulation - Cavity wall Insulation

Knauf DriTherm Cavity Slab 37 is a rigid to semi-rigid glass mineral wool slab, designed for use in external full-fill masonry cavity walls. It has a low thermal conductivity which helps the cavity batt insulation give an 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 Cavity Slab has the highest possible fire classification. They are rated A+ by Euroclass, which means the cavity batt insulation is non-combustible. Dritherm37 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. 

Knauf Insulations use a unique bio-binder based technology called ECOSE® Technology to make the glass mineral wool insulation more people and environment friendly. The manufacturing process of fibreglass insulation uses about 70% less energy when manufactured using Ecose Technology. It does not contain any added formaldehyde or phenol. Without the added formaldehyde, the cavity wall insulation generates very low levels of dust, which makes it easy to handle the product. Ecose technology makes the insulation soft to touch and increases the comfort for those handling it. 

Product Specification:

  • Length: 1200mm
  • Width: 455mm
  • Thickness Available: 50mm, 75mm, 85mm, 100mm, 125mm, 150mm


Slabs per pack

Coverage Area/pack (m2)



















Key Features:

  • Knauf Dritherm 37 is a non-combustible product. They are rated A1 according to Euroclass 
  • Dritherm 37 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. 
  • Cavity wall insulation is water-repellant. The special ingredient used during the manufacturing process ensures this.
  • Made with ECOSE Technology which means the product is soft to touch, has lower dust levels, Low VOCs, and is environment friendly.
  • Easy to handle and install, lightweight, easy to cut.
  • 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
  • 455mm wide cavity slabs of Knauf Insulation Dritherm 37 perfectly fit the standard tie spacings.
  • The link to Knauf Insulation Dritherm 37 web page can be found here for more details.


  • 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.


  • 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
  • Knauf Insulation is one of the world's largest insulation manufacturers with exceptionally high standards.
Average Customer Rating
Overall 5.0

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