Specialist Internal Wall Insulation
Across South Wales and South West England & South Wales
PAS 2030 accredited experts helping you reduce heat loss, lower energy bills, and upgrade your EPC rating.

Internal wall insulation is a highly effective solution when external alterations are not possible or desirable. If your home is located in a conservation area, has decorative brickwork, or is simply not suitable for external wall insulation, IWI allows you to improve energy efficiency without changing your property's exterior appearance. By applying high-performance insulation boards directly to the internal face of your external walls, we stop heat from escaping, effectively treating cold wall issues and reducing the strain on your heating system.

We follow a meticulous process to ensure every installation meets rigorous PAS 2035 retrofit standards. First, our team conducts a thorough property assessment to identify areas of heat loss and check for existing damp issues, which must be addressed before any insulation is installed. We then fit moisture-resistant, high-grade insulation boards that provide thermal protection while ensuring the wall remains breathable. The final stage involves expert skimming and plastering, leaving your walls smooth, flawless, and ready for decoration, blending seamlessly into your existing home aesthetic.

Upgrading to modern internal wall insulation is one of the most effective ways to lower your energy bills and improve your home's EPC rating. This is particularly vital for landlords who must comply with the latest MEES regulations for HMOs and rental properties across South Wales. By reducing thermal bridging and eliminating cold spots, you create a consistent indoor temperature, reducing the risk of damp and condensation that often affects older concrete or non-traditional builds. It is a smart investment that delivers long-term comfort and property value.

Deciding on the right insulation method can be complex, especially with the variety of housing stock in Rhondda Cynon Taf and the South West. Whether you live in a detached house, a traditional terrace, or a commercial office space, our team provides the expert guidance you need. We are a CHAS-accredited, PAS 2030 compliant company, and we provide insurance-backed guarantees through SWIGA for your total peace of mind. We pride ourselves on delivering high-quality, reliable retrofits that stand the test of time.