Soprema CW4000 (Partial Fill Cavity Wall Insulation) 1200mm x 450mm

• 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.

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.

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.