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Isover Cavity Wall Insulation - CWS 36 Cavity Slabs - 1200 x 455 x 75mm (16 Slabs, 8.74 Sqm / Pack)

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(incl VAT) £53.47 £49.80
-10%
(excl VAT) £41.50
Estimated Delivery Date Apr 29, 2026 - Apr 30, 2026
No deliveries on weekends or holidays.
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Product Details:

Thickness Length Width Slabs / Pack Coverage (Sqm/Pack)
50mm 1200mm 455mm 20  10.92 Sqm
75mm 1200mm 455mm 16  8.74 Sqm
100mm 1200mm 455mm 12  6.55 Sqm
125mm 1200mm 455mm 8  4.37 Sqm
150mm 1200mm 455mm 6 3.28 sqm

Isover CWS 36 Cavity Wall Insulation is the ultimate solution for enhancing thermal performance in masonry cavity walls. Crafted by Saint-Gobain, a leader in sustainable building solutions, this product is engineered to deliver superior insulation benefits while prioritizing environmental responsibility.

Made from premium quality glass mineral wool, Isover CWS 36 cavity wall slab insulation offer exceptional thermal conductivity, ensuring optimal energy efficiency in residential and commercial structures. Cavity slabs are precisely designed to be 455mm wide to fit between standard wall ties, making installation a breeze.

The innovative design of Isover cavity wall insulation allows it to seamlessly fit between wall tie spacing of the masonry cavity walls, maximising thermal insulation without compromising on space. Its non-combustible nature provides peace of mind, meeting the highest safety standards for construction materials.

Key Features:

  • Premium Quality Materials: Crafted from high-grade glass mineral wool for superior insulation performance. Furthermore, they comtain water-repellet binders atht help condensation and moisture builf-up in the cavities

  • Optimal Thermal Conductivity: Engineered to deliver excellent thermal conductivity of 0.036 W/m.K, these glass mineral wool slabs enhance energy efficiency in buildings.

  • Seamless Integration: Designed to fit flawlessly into masonry cavity walls, maximising thermal insulation without sacrificing space.
  • Non-Combustible Design: Isover CWS 36 cavity insulation achieves a Euroclass A1 Reaction to Fire classification, according to EN 13501-1., thereyby providing peace of mind with its non-combustible nature, meeting stringent safety standards for construction materials.

  • Sustainable Production: Made from up to 75% recycled glass, these cavity slabs contribute to environmental sustainability while maintaining high-quality performance.

  • Certified Performance: Recognised by BBA (British Board of Agrément) for its exceptional thermal performance and durability. Isover cavity wall slab 36 has been assessed by the BBA as fit for use in defined full fill and partial fill masonry cavity wall applications if installed, used and maintained as set out in the certificate.

Applications: 

Isover cavity wall insulation can be used to insulate:

  • External Walls - for full fill masonry cavity walls insulation
  • Partial Fill Masonry Cavity Wall insulation as well
Free Collections Available
Save on delivery charges and collect the order for free from a warehouse near you. Just choose the In-Store Pickup option at the checkout or call: 03303130245
Free pick-up locations include - Warrington, Wolverhampton, Gatwick, Bedford, Ipswich, Glasgow, Newcastle, Leeds, Chesterfield and Bridgewater.

 

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Order Value (Excluding VAT) Delivery Charge (Excluding VAT)
Above  £405 Free Delivery*
Up To £405 £50

 

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In Store Pickup Available
Save on delivery charges and collect the order for free from a warehouse near you. Just choose the In Store Pickup option at the checkout.
Free Collections Available
Save on delivery charges and collect the order for free from a warehouse near you. Just choose the In-Store Pickup option at the checkout or call: 03303130245
Free pick-up locations include - Warrington, Wolverhampton, Gatwick, Bedford, Ipswich, Glasgow, Newcastle, Leeds, Chesterfield and Bridgewater.

 

Delivery Terms
Order Value (Excluding VAT) Delivery Charge (Excluding VAT)
Above  £405 Free Delivery*
Up To £405 £50

 

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