External wall insulation in Feltham
Homeowners in Feltham look at external wall insulation for warmer rooms, lower heat loss and a new exterior in one job. Here is how it works, what it costs and which England rules apply.
Homes in and around Feltham
Feltham is in the TW13 postcode district, about 13 miles from London. 6 other towns we cover are within 25 miles.
Our Feltham surveys cover the TW13 district and the surrounding area, including Hanworth, Ashford in Surrey and Hounslow.
Most EWI failures start at the edges rather than the middle of a wall, so the quote for your Feltham home sets out how each detail will be built.
Nearby towns we cover: Hanworth (2 miles), Ashford, Surrey (2 miles), Hounslow (3 miles), Sunbury-on-Thames (3 miles), Hampton (3 miles), Heston (3 miles).
External wall insulation prices in Feltham
Guide prices for external wall insulation in Feltham run from about £109 to £175 per square metre installed, depending on system and finish; scaffolding priced per house, with VAT at 0% on homes until 31 March 2027.
The final figure depends on wall area, the number of windows and doors, the finish and how much work the roofline, sills and services need.
Popular services in Feltham
- EPS insulated render
- Phenolic EWI
- Wood fibre EWI
- Brick slip EWI
- Insulated cladding
- Non-traditional houses
- Terraced house EWI
- Semi-detached EWI
- Detached house EWI
- EWI for landlords
- All 24 services
Rules that apply in Feltham
- Funding
- Low-income households in homes rated below EPC C can apply for Warm Homes: Local Grant where their council is taking part. The Great British Insulation Scheme closed on 31 March 2026, and ECO4 closes on 31 December 2026; its final months are for finishing and putting right existing work. Grant schemes use their own approved installers, so check a scheme's installer rules before booking; our quotes are for privately funded work unless we confirm otherwise in writing. Grants guide
- VAT
- Installing insulation in a home is zero-rated for VAT until 31 March 2027, then 5%.
Checked October 2026. Rules change, so we confirm them for your address at survey.
External wall insulation in Feltham: questions
How much should I budget for external wall insulation in Feltham?
Budget around £109–£175 per square metre of wall for the system and finish, plus scaffolding priced per house. The survey measures your walls in Feltham and fixes the total in writing.
Do you cover Hanworth as well as Feltham?
Yes. From Feltham we also cover Hanworth, Ashford in Surrey and Hounslow, and the rest of Greater London.
Which EWI system suits homes in Feltham?
It depends on the walls. Most brick houses in Feltham suit EPS with silicone render; older stone or lime-built walls suit wood fibre or insulating lime render; and blocks need mineral wool. The free survey recommends one and explains why.