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3 Reviews
View Product Reviews75mm Celotex CW4075 Cavity Wall Insulation Board 1200mm x 450mm (4.32m2/Pack)
| 10+ packs | 15+ packs | 20+ packs |
| £53.23ex. VAT | £52.97ex. VAT | £52.67ex. VAT |
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Tue 13 May
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- Choose Clearpay at checkout to pay later with Pay in 4.
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Clearpay lends you a fixed amount of credit so you can pay for your purchase over 4 instalments, due every 2 weeks. Ensure you can make repayments on time. You must be 18+ and a permanent UK resident (excl Channel Islands). Clearpay charges a £6 late fee for each late instalment and a further £6 if it’s still unpaid 7 days later. Late fees are capped at £6 for orders under £24 and the lower of £24 or 25% of the order value for orders over £24. Missed payments may affect your ability to use Clearpay in the future and your details may be passed onto a debt collection agency working on Clearpay’s behalf. Clearpay is credit that is not regulated by the Financial Conduct Authority. T&Cs and other eligibility criteria apply at clearpay.co.uk/terms
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Klarna's Pay in 3 / Pay in 30 days are unregulated credit agreements. Borrowing more than you can afford or paying late may negatively impact your financial status and ability to obtain credit. 18+, UK residents only. Subject to status. Late fees may apply. Ts&Cs apply
Clearpay is unregulated credit. Use responsibly. 18+, T&Cs and late fees apply at clearpay.co.uk/apply
Delivery & Returns Information
All delivery charges are shown in your basket and are dependent on the total value of items in your basket based on product category.
This charge is based on delivery to mainland UK excluding the following postcodes: AB, CF, DD, DG, KW, IV, LD, LL, NP, PH, SA and SY. If your delivery address is in any of these postcode areas a member of our customer service team will contact you prior to processing your order should an additional delivery charge apply. We do not offer deliveries outside the UK mainland.
Standard (Nationwide) Delivery
| Insulation, Plasterboard and Drylining Products | |
|---|---|
| ORDER VALUE | DELIVERY CHARGE |
| Under £150 | £50 ex. VAT |
| Between £150 - £400 ex. VAT | £35 ex. VAT |
| Over £400 ex. VAT | FREE |
| Timber & Sheet, Building Materials, Joinery and Gardens & Landscaping Products | |
| ORDER VALUE | DELIVERY CHARGE |
| Under £100 | £25 ex. VAT |
| Between £100 - £250 ex. VAT | £20 ex. VAT |
| Over £250 ex. VAT | FREE |
| SuperFOIL and YBS products | |
| ORDER VALUE | DELIVERY CHARGE |
| Each item | £10 ex. VAT |
| Over £350 ex. VAT of 1 brand | FREE |
| Screws & Fixings and Adhesives & Sealants | |
| ORDER VALUE | DELIVERY CHARGE |
| Under £100 | £7.50 ex. VAT |
| Over £100 ex. VAT | FREE |
Express Delivery
| Express Delivery - Insulation and Plasterboard & Drylining | |
|---|---|
| ORDER VALUE | DELIVERY CHARGE |
| Under £400 | £50 ex. VAT |
| Over £400 ex. VAT | £35 ex. VAT |
| Express Delivery - Timber & Sheet, Building Materials, Joinery and Gardens & Landscaping Products | |
| ORDER VALUE | DELIVERY CHARGE |
| Under £300 | £50 ex. VAT |
| Over £300 ex. VAT | £35 ex. VAT |
Returns
We offer a 30 day returns policy on any faulty products.
Key Features
- Rigid partial fill cavity wall insulation
- Aluminium composite facing on both sides
- 0.022 W/mK thermal conductivity
- Easy to handle and install
- Zero Ozone Depletion Potential (ODP)
- BBA certified
Technical Specification
| Material Type: | PIR |
|---|---|
| Thickness: | 75mm |
| Width: | 450mm |
| Length: | 1200mm |
| Pieces Per Pack: | 8 |
| Sales Unit: | Pack |
| Sales Unit Coverage: | 4.32m2 |
| Brand: | Celotex |
| Manufacturer's Reference: | CW4075 |
| Weight: | 12.01kg |
| Thermal Conductivity: | 0.022W/mK |
Technical Downloads
What is Celotex 75mm Cavity Insulation?
Celotex CW4075 is a high-performance, polyisocyanurate (PIR) insulation board tailored for partial fill insulation in masonry cavity walls.
Featuring a PIR core encased between low emissivity foil facings on both sides, it achieves a thermal conductivity of just 0.022 W/mK. This 75mm cavity insulation board, measuring 1200mm by 450mm with a thickness of 75mm, is renowned for its lightweight, rigid structure, making it straightforward to handle and install.
Celotex 75mm cavity insulation is distinguished by its British Board of Agrément (BBA) certification, ensuring compliance with rigorous quality and performance standards.
Where is Celotex CW4075 Used?
Celotex 75mm cavity insulation is specifically designed for partial fill cavity wall applications, including new constructions and extensions that incorporate masonry cavity walls.
Its dimensions are optimised for standard wall tie spacings, facilitating a snug fit and seamless integration with adjacent boards to enhance the overall thermal efficiency of the building envelope.
Celotex CW4075 Benefits
- Enhanced Thermal Performance: With a low thermal conductivity of 0.022 W/mK, it significantly reduces heat loss through walls, contributing to a warmer and more energy-efficient structure.
- Moisture Resistance: The closed-cell structure of the PIR core is water-repellent, ensuring that moisture does not compromise the insulation’s effectiveness or the structural integrity of the wall.
- Durability: Designed to withstand the elements, Celotex CW4075 promises long-lasting performance and protection against air movement and heat loss.
- Eco-friendly: This 75mm cavity insulation board is produced using a blowing agent with zero Ozone Depletion Potential (ODP) and low Global Warming Potential (GWP), alongside a BRE Green Guide Rating of A for sustainability.
CW4075 Certifications
BS EN is British and European Standard Specifications. With over 100 years of experience, the British Standards Institute is recognised as the UK’s National standards body.
- Spread of flame: fire classification of Class E
- Thermal conductivity of 0.022 W/m.K, reducing the thickness of insulation required to hit the target U-value - BS EN 12667
- BRE Green Guide Rating of A for sustainability - which can assist in demonstrating environmental performance in your BREEAM assessments
- BBA certified
Customer Reviews
Easy to cut and fit
Perfect for under my floors, really sturdy board
Thanks
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