Expert Cavity Wall Insulation
Across South Wales and South West England & South Wales
Reduce heat loss, lower energy bills, and improve your EPC rating with our PAS 2030 accredited installers.

We take a systematic, quality-first approach to every installation. Our team begins with a thorough survey to ensure your property is suitable for cavity wall insulation, checking for existing damage or structural issues. Using high-performance materials, we carefully drill small, discreet patterns into the outer mortar joints of your home. We then inject the insulation material uniformly to ensure total coverage of the cavity. Once the job is finished, we patch the drill holes with matching mortar, leaving your exterior looking exactly as it did before. The entire process is designed to be efficient, clean, and minimally disruptive to your daily routine.

Upgrading your insulation is one of the most effective ways to boost your thermal comfort and property value. Beyond the immediate relief from cold draughts and fluctuating room temperatures, you will notice a drastic improvement in your energy efficiency rating. For homeowners looking to improve their EPC rating or landlords aiming to meet the latest MEES standards, this is a vital step in modernising your property. A warmer home is not only more comfortable to live in, but it also creates a healthier environment by reducing the risk of damp and mould growth caused by cold wall surfaces.

When you choose Global Plastering, you are opting for a partner that prioritises industry-leading standards. We are fully PAS 2030 accredited and work in strict accordance with PAS 2035 retrofit protocols. Whether you own a detached home, a terrace, or a bungalow, we provide peace of mind through SWIGA, offering comprehensive insurance-backed guarantees. As a CHAS-compliant and fully insured business, we handle every project with the professionalism and safety protocols required for both domestic and commercial insulation tasks across South Wales and the South West.

How do I know if my house has a cavity wall? Generally, houses built after the 1920s with regular brick patterns often have cavities. If you are unsure, our team can confirm this during a site survey. Is the installation messy? We take great care to keep your site tidy, and because the injection points are small and carefully patched, the visual impact on your home is negligible. How much money can I save? While individual savings depend on your property size and energy habits, a well-insulated cavity can reduce heat loss through walls by up to 35 percent, leading to substantial year-round savings on your heating costs.