Knauf Dritherm 32 - Mineral Wool Cavity Insulation Slab

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Brand: Knauf Insulation
Country of Manufacture: United Kingdom
In Stock
Product Code: KFDUCS
Est. Delivery: 2-3 Working Days
Shipping cost displayed in basket
£29.99 (ex VAT)
£35.99 (incl VAT)

Knauf DriTherm Cavity Slab 32 Ultimate is a non-combustible, water-repellent, glass mineral wool slab designed for use in external full-fill masonry cavity walls. Dritherm 32 is 455mm wide and perfectly fits standard vertical wall tie spacings to offer excellent thermal performance. The slabs are knit together to eliminate air gaps enhancing their insulating properties.

Dritherm cavity 32. 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. Cavity slabs are water-resistant and do not let the water reach the inner leaf. It helps keep moulds and other moisture-related problems away. Dritherm 32 is also non-combustible, durable and easy to install. 

To make the glass mineral wool insulation more environmentally friendly as well as people-friendly, Knauf Insulations uses a unique bio-binder technology called ECOSE® Technology. The fibreglass insulation is made using 70% less energy with no added formaldehyde or phenol. As a result, cavity wall insulation generates very low levels of dust, which makes it easy to handle. Ecose technology makes the insulation soft to touch and increases the comfort for those handling it. The use of  Ecose technology in products like Dritherm 32 helps improve air quality. 

Product Specification:

  • Length: 1200mm
  • Width: 455mm
  • Thickness Available: 75mm,100mm and125mm.


Slabs per pack

Coverage Area/pack (m2)











Key Features:

  • Knauf Dritherm 32 cavity wall slabs are non-combustible. They are rated  A1 according to Euroclass Reaction to Fire classification
  • They are used in external masonry cavity walls
  • Knauf Dritherm 32 cavity wall slabs are British Board of Agreement approved for use in all exposure zones
  • The cavity wall insulation slabs are water repellent, odourless and non-hygroscopic
  • Dritherm 32 is easy to handle and install, lightweight, easy to cut. The installation does not require any specialist tools.
  • The 455mm wide cavity slabs of Knauf Dritherm 32 perfectly fit the standard tie spacings.


  • Earthwool DriTherm Cavity Slabs are for the thermal insulation of masonry cavity external walls and are installed to fully 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.

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