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Celotex Thermaclass Cavity Wall 21

SKU: TC1090

Price
£102.36 Incl. VAT
£85.30 Ex. VAT

Description

Thermaclass Cavity Wall 21 is a high-performance polyisocyanurate (PIR) insulation board specifically designed for full fill cavity wall applications. With an impressive thermal conductivity of 0.021 W/m.K, it provides exceptional thermal efficiency, helping to meet target U-values while minimising the required insulation thickness. Its low emissivity foil facing further enhances thermal performance, particularly in applications with a 10mm residual cavity.

The lightweight boards, measuring 1190 x 450mm with a convenient tongue-and-groove edge profile, are designed to fit standard cavity wall tie spacing. This makes them easy to handle, transport, and install, reducing on-site effort and speeding up the construction process. Whether used with a small residual cavity to account for mortar squeeze or as a true full fill solution with no residual space, Thermaclass Cavity Wall 21 ensures an effective and reliable fit.

Approved by the British Board of Agrément (BBA certificate 16/5343), this insulation board is recognised as fit for purpose in full fill cavity wall applications when installed in accordance with the certification guidelines. Its durable low emissivity foil facing not only improves thermal performance but also adds to the product's reliability and longevity.

Thermaclass Cavity Wall 21 combines exceptional thermal performance, ease of installation, and BBA-certified quality, making it a trusted choice for cavity wall insulation. It’s an ideal solution for projects requiring high performance with streamlined installation.

Why Choose the Celotex Thermaclass Cavity Wall 21?

  • Lightweight insulation board
  • Range of thicknesses available
  • Excellent thermal performance
  • Low emissivity foil facing
  • Easy to transport and install
  • BBA certified

Product Specifications:

Thickness: Select from dropdown

Length: 1190mm

Width: 450mm

Lambda Value: 0.021

Please note: Celotex Thermaclass Cavity Wall 21 should not be used in the external walls of buildings over 11 metres in height.

Deliveries are made on the basis the customer can accept the goods, or willingness to off load the goods, or having means of mechanical offload, this also applies to heavier items such as pallets etc. All deliveries are made ‘kerbside’ and often it can be at the discretion of the driver. A large majority of deliveries would be made on a large rigid tail-lift vehicle and off loaded via a pallet truck and only on to flat surfaces such as tarmac, concrete and pavers.

If you do have restricted access, please contact us prior to placing your order. We will always try to accommodate your needs. If a delivery fails due to access, we reserve the right to make a re-delivery charge.

All delivery charges are calculated when checking out. The delivery charges included are for the Mainland UK only and do not apply to the Scottish Highlands, or Isles off the Mainland. Additional charges may apply for deliveries that aren’t classed within the Mainland (this is classed by ourselves, suppliers and couriers) Please contact us on 01752 466151 or sales@roofingsuppliesuk.co.uk

Due to the nature of our business model, this can mean your order will be sent via multiple deliveries.

Whilst we will make every effort to deliver your goods within the stated/requested time frame, we cannot guarantee availability from the manufacturer or the manufacturer's delivery schedules, so we would recommend the end user not to start/schedule any work until the goods arrive. Due to logistics of various couriers and suppliers we are unable to give times of deliveries. However, please call or email us on the day of the delivery and we will try to get an approximate time. Deliveries can take place from as earlier as 07:30 right up to 18:00 depending on the courier/haulier and taking into account local traffic etc.

You have 14 days from receiving your item(s) to return them should you wish to do so. Please contact us should you wish to arrange a refund/return. Any product marked cut to size, bespoke or made to order are non returnable and excluded from our refund policy.

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