Warm Homes Plan

Warm Homes Plan: Cavity Wall Insulation

The Warm Homes Plan funds free cavity wall insulation for eligible your area households. The Energy Saving Trust estimates that uninsulated walls are one of the main sources of heat loss in a typical home. Check if your your area home qualifies.

Free cavity wall insulation for eligible households

What the Warm Homes Plan: Cavity Wall Insulation covers

Free eligibility check. Submitting the form takes about 60 seconds. We only forward your details to a scheme-registered installer if you give consent on the form.

Popular areas

See more areas or use the form on any town page to check your eligibility.

Frequently asked questions

Can I get free cavity wall insulation in your area through the Warm Homes Plan?

Yes. Cavity wall insulation is one of the most common Warm Homes Plan measures for your area properties built from the 1920s onward that have unfilled cavities. If your household receives a qualifying benefit and your EPC rating is D or below, you may qualify for free installation. Submit the form to check.

How do I know if my your area home has cavity walls?

Most UK homes built between 1920 and 1990 have cavity walls, consisting of two layers of brick with a gap between them. You can often tell by measuring wall thickness (cavity walls are typically 260mm or more), checking your EPC, or asking an installer. Properties built before 1920 usually have solid walls. The free survey will confirm.

How does cavity wall insulation work?

A trained installer drills small holes (typically 22mm) at regular intervals on the outside wall, then injects insulating material (mineral wool, polystyrene beads, or polyurethane foam) into the cavity. The holes are neatly filled and the process takes a few hours with minimal disruption to your your area home.

Who qualifies for free cavity wall insulation under the Warm Homes Plan?

You need a qualifying benefit (Universal Credit, Pension Credit, Income Support, or similar) and an EPC rating of D, E, F or G. The property must have suitable unfilled cavity walls. Owner-occupiers and private tenants with written landlord permission can both apply.

Is cavity wall insulation safe?

Yes, when installed correctly by a registered installer in a suitable property. All Warm Homes Plan-funded installers must be TrustMark registered and follow PAS 2030 standards. If the wall has existing damp or structural issues, the installer will identify these during the free survey and advise accordingly.

How much can cavity wall insulation save on bills?

The Energy Saving Trust estimates cavity wall insulation saves a typical semi-detached your area home around £145 to £290 per year in heating costs. Actual savings depend on current energy prices, property size, and how well the rest of the home is insulated. Submit the form now to check your eligibility.

These low-cost improvements can start reducing your bills straight away.

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