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Cavity wall insulation (CWI) fills the gap between the inner and outer leaves of a brick wall with an insulating material—typically mineral wool, expanded polystyrene beads, or polyurethane foam. By reducing heat loss through your walls, CWI can:
•Boost Comfort: Walls stay warmer in winter and cooler in summer.
•Cut Energy Bills: Insulation can save up to £150–£300 per year on heating costs.
•Shrink Your Carbon Footprint: Less heating demand means lower CO₂ emissions.
The UK Government’s Energy Company Obligation 4 (ECO4) scheme is designed to help lower-income and vulnerable households make energy-saving improvements—at absolutely no cost to eligible homeowners. Under ECO4, approved installers can claim the grant directly, so you pay £0 for cavity wall insulation.
Most owner‑occupiers and private tenants in receipt of certain means‑tested benefits or living in low‑income households qualify. Common eligibility criteria include: .
How FreeHouseKit.co.uk helps
We simplify the eligibility check—just answer a few quick questions online, and we’ll confirm if you can apply for a free ECO4 grant.
A certified installer conducts a no‑obligation survey to verify wall type, cavity width, and current EPC rating.
We submit your details to an energy supplier under ECO4. Once approved, the grant covers the full cost.
Installed in as little as a few hours, with minimal disruption—drill holes, inject insulating material, seal holes.
A final inspection ensures quality and updates your EPC to reflect the improved rating (often boosting by one or two bands).
•100% Free to You
We handle everything—from eligibility checks to liaising with installers—so you don’t pay a penny.
•Trusted Installers
All EPC‑trained and MCS‑certified installers meet strict quality and safety standards.
•No Hidden Fees
The ECO4 grant covers the full installation cost; there are never any surprise charges.
•Fast, Hassle‑Free
Most approvals granted within 1–2 weeks; installations scheduled at your convenience.
Up to 25 years or more, depending on material and property conditions.
No. The process is internal—holes are less than 25 mm diameter and are neatly re‑pointed after installation.
Yes! ECO4 also covers loft insulation, boiler upgrades, and more. Ask us about multi‑measure funding.
Ready to save on energy bills and make your home more comfortable?
1.Complete our online form with your postcode and benefit details.
2.We’ll confirm your grant eligibility within 48 hours.
3.Schedule your free survey at a time that suits you.
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