External wall insulation in Boston
Every external wall insulation job in Boston starts with a free survey of your walls: what they are built from, how they have weathered, and what the details around windows, eaves and services will need.
Homes in and around Boston
Boston is in the PE21 postcode district. 4 other towns we cover are within 25 miles.
Our Boston surveys cover the PE21 district and the surrounding area, including Spalding, Skegness and Wisbech.
Most EWI failures start at the edges rather than the middle of a wall, so the quote for your Boston home sets out how each detail will be built.
Nearby towns we cover: Spalding (14 miles), Skegness (19 miles), Wisbech (23 miles), King's Lynn (23 miles).
External wall insulation prices in Boston
Guide prices for external wall insulation in Boston 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.
Brick slips, cladding and mineral wool cost more than EPS and render; the survey shows you the difference side by side.
Popular services in Boston
- EWI installation
- Mineral wool EWI
- Brick slip EWI
- Silicone render finish
- Mineral & silicate render
- Solid wall insulation
- Terraced house EWI
- Flats & low-rise blocks
- Failed EWI remediation
- EWI surveys
- All 24 services
Rules that apply in Boston
- 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 Boston: questions
How much should I budget for external wall insulation in Boston?
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 Boston and fixes the total in writing.
Do you cover Spalding as well as Boston?
Yes. From Boston we also cover Spalding, Skegness and Wisbech, and the rest of Lincolnshire.
Which EWI system suits homes in Boston?
It depends on the walls. Most brick houses in Boston 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.