100% Grant Funded

Free Cavity Wall Insulation Grants 2025

Get 100% funded cavity wall insulation through government grants. Save up to £300 per year on heating bills with no upfront costs.

Check My Eligibility Cost Calculator
FREE
With ECO4/GBIS Grants
£300
Annual Savings
40+ Years
Lifespan
1-2 Days
Installation Time

Available Grant Schemes

Two government schemes offer 100% funded cavity wall insulation

ECO4 Scheme

Most Popular Route

Benefits Route

Receive certain benefits (Universal Credit, Pension Credit, Child Benefit, etc.)

LA Flex Route

Household income under £36,000 + EPC rating D-G

Coverage

100% funded • No repayment • Runs until March 2026

Full ECO4 Guide →

GBIS Grant

Great British Insulation Scheme

Income Requirements

Household income under £36,000 per year

Council Tax Band

England: A-D • Scotland: A-E • Wales: A-E

EPC Rating

Must be D, E, F, or G

Full GBIS Guide →

Why Get Cavity Wall Insulation?

Save £300 Per Year

Typical savings of £300 annually on heating bills. Cavity walls lose 35% of home heat without insulation.

Quick Installation

1-2 day installation with minimal disruption. Installers work from outside, drilling small holes that are filled afterwards.

40+ Year Lifespan

Lasts 40+ years with no maintenance required. 25-year guarantees standard. Installation pays for itself many times over.

Check Your Grant Eligibility

Get 100% funded cavity wall insulation. Save £300/year on heating bills with no upfront costs.

Check Eligibility - Takes 2 Minutes