Cavity Wall Insulation

Strengthen your homes efficiency.

Zest’s cavity wall insulation (CWI) service fills the gap between your home’s external and internal walls with advanced insulating materials that prevent heat loss and cold bridging. Properly installed CWI can transform comfort levels, reduce condensation, and slash heating costs. Each installation is carried out by certified professionals using accredited products tailored to your property type and condition.

With Zest, you’re not just getting insulation—you’re investing in a carefully planned upgrade that considers ventilation, moisture control, and long-term performance. Every CWI project is backed by robust guarantees and expert aftercare.