Competitive Trade Pricing with quantity discounts. Online supplier of Celotex Cavity Wall Insulation. There are two types of Celotex Cavity Wall. The Celotex Thermaclass Cavity Wall 21 ( full fill insulation) and the Celotex CW4000 (partial fill insulation).

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Thermaclass Cavity Wall 21is an easy to install, polyisocyanurate (PIR) insulation board for full fill cavity wall applications, with excellent thermal performance (0.021 W/m.K). Celotex CW4000 is an easy to install polyisocyanurate (PIR) insulation board with excellent thermal performance, featuring a low emissivity foil facing.

Have a browse of our stock and filter by thickness or coverage on the left-hand side of the page. If you’d like to talk through the suitability of some Insulation Boards for your project, or get a quantity discount quotation please call us on 02039519012 , email sales@insulationstoreonline.co.uk or Live Chat - Lowest UK Prices.