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Isover CWS 36 Cavity InsulationIsover CWS 36 Cavity InsulationIn Situ Shot
Isover CWS 36 Cavity Insulation
In Situ Shot

Isover CWS 36 is a medium density glass mineral wool slab supplied in 85mm thickness with a total pack area of 6.55m2. The strong, resilient and flexible batts are 455mm wide to fit between standard wall tie spacing. Isover CWS 36 provides thermal performance in external masonry cavity walls to meet Approved Document L (England and Wales).



Company Stock:


  • £31.97

  • £38.36

    inc VAT


TypeCavity Roll
Pieces per pack12
Pack Area6.55m²

Features & Benefits

  • Thermal performance - Thermal conductivity of 0.036 W/mK. Provides excellent thermal performance, reducing heat loss through the building envelope.
  • Non-combustible - Isover glass mineral wool insulation has an A1 Euroclass fire rating – the best attainable.
  • Recycled content - Manufactured from up to 86% recycled post-consumer glass that would otherwise go to landfill.
  • Protected planet - Zero Ozone Depletion Potential (ODP) and Global Warming Potential of less than 5.


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Data Sheet
Featuring a 'turn-n-slide tie' to accommodate all sizes of brick/block. To suit wall thickness up to 250mm. Each pack contains two 1165mm lengths. Slots at each end allow easy connection of one length to the next. Manufactured from stainless steel.
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