Soprema  |  SKU: 52110905278811

Soprema Sopratherm CW4000 Cavity Wall Insulation - 1200mm x 450mm

£62.65 GBP
Shipping calculated at checkout.

Call to enquire

Bulk deals available Call 020 3004 5451
Estimated Delivery Date

trusted uk supplier

Trusted UK Supplier

See our reviews!

Delivery & Shipping

Standard: 3-7 Working Day Delivery

Express: Same/Next Day Delivery - subject to availability, please call: 020 3004 5451

For further information, please see our Delivery & Shipping Policy here.

Contact

Have any questions or need assistance with this product?

Phone: 020 3004 5451

Email: sales@nationalinsulationsupplies.com

Contact us.

Returns

Have any questions or need assistance with this product?

Phone: 020 3004 5451

Email: sales@nationalinsulationsupplies.com

Contact us.

Product Datasheets

Product Datasheet:

CW4000 Datasheet

Declaration of Performance:

CW4000 DoP

U-Value Calculator

Things you should know about this product!

  • This product is sold by the pack
  • The amount of boards in a pack depends on the thickness
  • This product is available in the following thicknesses: 40mm, 50mm, 60mm, 75mm, 85mm and 100mm

Description

SOPRATHERM CW4000 (formerly Celotex CW4000) is a rigid polyisocyanurate (PIR) thermal insulation board with a low-emissivity foil facing, designed for ease of handling and installation. It is suitable for use in partial fill masonry cavity wall applications.

The board is available in thicknesses ranging from 40mm to 100mm and provides effective thermal performance while maintaining the required cavity width. The foil facing helps to enhance thermal efficiency and contributes to the overall performance of the wall construction.

Specifications

  • Length
    1200mm
  • Width
    450mm
  • Material type
    Polyisocyanurate
  • Thermal conductivity
    0.022 W/mK
  • Fire rating
    Euroclass F
  • Compressive strength
    120 kPa
  • Edge
    Square

Key Features

• Thermal Performance - Good thermal performance with a thermal conductivity of 0.022 W/m.K, reducing the thickness of insulation required to hit the target U-value.

• Low Emissivity Foil Facing - Provides improved thermal performance in sealed cavity air spaces, improving the achievable U-value.

• Easy to Install - The boards are light and rigid assisting with ease of transportation, handling and fitting. They are sized to fit standard wall tie spacing for ease of installation

• BBA Certified - SOPRATHERM CW4000 has been assessed by the BBA as fit for use in defined partial fill cavity wall applications if installed, used and maintained as set out in the certificate. Please read the BBA certification page for full details and restrictions.

When using SOPRATHERM CW4000, you need to satisfy yourself that use of the product meets all relevant national Building Regulations and guidance as well as local, national and other applicable standards relevant for your construction or application, including requirements in relation to fire and applicable height restrictions.

Where to use

Cavity Walls: Soprema cavity wall insulation provides a highly effective solution for improving thermal performance and limiting heat loss within building envelopes, supporting better overall energy efficiency across a wide range of climatic conditions. Manufactured from rigid polyisocyanurate (PIR), the insulation delivers low thermal conductivity, allowing high levels of insulation to be achieved with reduced thickness — ideal for designs where internal or cavity space is restricted. In addition to its thermal benefits, the material offers strong resistance to moisture and long-term durability, helping to reduce the risk of damp penetration, structural deterioration, and mould growth. Its lightweight nature also simplifies on-site handling and installation, which can contribute to shorter installation times and improved efficiency during construction. Overall, Soprema cavity wall insulation combines reliable thermal performance with durability and practical installation benefits, making it a suitable choice for both residential and commercial applications.

Frequently asked questions

Does Soprema cavity wall insulation comply with recognised standards and certifications?

Soprema cavity wall insulation products are manufactured to meet applicable UK building regulations and relevant industry standards. They are tested for thermal performance, fire behaviour, and durability, with certification provided by recognised third-party bodies to demonstrate product consistency and compliance.

Can Soprema cavity wall insulation be used for refurbishment projects?

Yes, Soprema cavity wall insulation is suitable for use in both refurbishment and new-build applications. Its format and performance characteristics make it appropriate for improving the thermal efficiency of existing cavity walls as well as being installed during new construction.

What environmental considerations apply to Soprema cavity wall insulation?Soprema insulation products are designed to deliver high levels of thermal efficiency, which can contribute to reduced operational energy use in buildings. As with many rigid insulation materials, environmental impact should be considered over the full product lifecycle, and Soprema provides information on responsible specification, use, and disposal.

Payment & Security

Payment methods

  • American Express
  • Apple Pay
  • Diners Club
  • Discover
  • Google Pay
  • Maestro
  • Mastercard
  • PayPal
  • Shop Pay
  • Union Pay
  • Visa

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

Compare with similar products

You are currently viewing the first product on this grid:

A table comparing the facets of 2 products
Facet
Soprema Sopratherm CW4000 displayed on a white background
Soprema Sopratherm CW4000 Cavity Wall Insulation - 1200mm x 450mm
View details
A white Celotex cavity wall insulation board stacked upon another
Celotex CW4000 Cavity Wall Insulation - 1200mm x 450mm - All Thicknesses
View details
Price
Price
From £47.30 GBP
From £47.30 GBP
Length
Length
1200mm
1200mm
Width
Width
450mm
450mm
Edge
Edge
Square
Square
Fire rating
Fire rating
Euroclass F
Euroclass F
Compressive strength
Compressive strength
120 kPa
120 kPa
Thermal conductivity
Thermal conductivity
0.022 W/mK
0.022 W/mK
Material type
Material type
Polyisocyanurate
Polyisocyanurate
Soprema Sopratherm CW4000 displayed on a white background
Soprema
Soprema Sopratherm CW4000 Cavity Wall Insulation - 1200mm x 450mm
From £47.30 GBP

Length

1200mm

Width

450mm

Edge

Square

Fire rating

Euroclass F

Compressive strength

120 kPa

Density

N/A

Thermal conductivity

0.022 W/mK

Material type

Polyisocyanurate
View product

Welcome to Shopify Store

I act like: