Knauf DriTherm 37 Cavity Earthwool Slab

£25.95£49.95 Incl. VAT

Free delivery over £250 (Exceptions Apply)
Next Day Available | 30 Day Return Policy
Further Delivery Information

Product Overview

Knauf DriTherm 37 Cavity Earthwool Slab is a water-repellent Glass Mineral Wool slab, designed for use in external full-fill masonry cavity walls, that offers excellent thermal performance.

It is non-combustible with the best possible Euroclass A1 reaction to fire classification, and is manufactured using Knauf Insulation’s unique bio-based binder, ECOSE® Technology.

Knauf DriTherm 37 Cavity Earthwool Slab Benefits

  • Cavity barriers are not required with non-combustible full fill insulation, minimising the risk of fire spreading through a cavity.
  • Water repellent and BBA certified for use in all exposure zones, including those in very severe areas.
  • Slabs are sized to fit between wall ties without the need for retaining discs.


  • Length: 1.2m
  • Width : 455mm
  • Pack quantity: 8 x slabs


  • Thickness: 100mm
  • Thermal conductivity : 0.037W/mK
  • Thermal resistance: 2.7m2K/W
  • Pack quantity: 8 x slabs
  • Pack coverage: 4.37m2


  • Thickness: 75mm
  • Thermal conductivity : 0.037W/mK
  • Thermal resistance: 2.00m2K/W
  • Pack quantity: 8 x slabs
  • Pack coverage: 4.37m2


  • Thickness: 50mm
  • Thermal conductivity : 0.035W/mK
  • Thermal resistance: 1.40m2K/W
  • Pack quantity: 12 x slabs
  • Pack coverage: 6.55m2


Knauf DriTherm 37 Cavity Earthwool Slab is certified by the British Board of Agrement Certificate 95/3212. Approval can be sought from Knauf Insulation Ltd and the British Board of Agreement for Earthwool DriTherm Cavity Slab’s use in buildings over 25m high.

Handling & storage

Earthwool DriTherm Cavity Slabs are easy to handle and install, being lightweight and easily cut to size, where necessary. They are supplied in polythene packs which are designed for short term protection only.


For longer-term protection on site, the product should either be stored indoors or undercover and off the ground. Earthwool DriTherm Cavity Slabs should not be left permanently exposed to the elements.

Delivery Information

We have multiple delivery options

  • Next Day Carrier
  • Delivery From Branch 1-5 Working Day
  • Pallet -1-3 Days
  • Standard 1 -3 Day Carrier
  • Economy 1-3 Day Carrier
  • Click & Collect from store


The cost of the carriage will be displayed before your final checkout. Free delivery is available on most items for orders over £250, exceptions do apply.

Click And Collect

Please note that our stock levels are not live. Please contact your local branch prior to purchase, so that we can ensure the product is available to you. If the product isn’t available, we can organise this through an alternative branch.


  • Orders will only be dispatched and delivered on weekdays.
  • Orders for the next working day delivery must be placed before 2 pm, this gives us time to pick and pack before the carrier arrives to collect.
  • We aim to dispatch all carrier delivered items within 48hrs, and all items delivered on our own transport within 5 days, Monday to Friday. Saturday Delivery can be made upon request, depending on availability.
  • An email will be sent when your goods leave us via Carrier, this email will include tracking information. If your order is delayed for any reason, we will contact you.
  • If delivery is from a Branch, then a member of our team will be in contact with you.


We pride ourselves on our customer service, but mistakes can happen. If you receive an incorrect or faulty item, please notify us within 30 days to arrange a refund, return or exchange.


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