External wall insulation in St Albans
We cover St Albans and nearby Harpenden for external wall insulation, with the survey, system choice, building control and finish all set out in one written quote.
Homes in and around St Albans
St Albans is in the AL1 postcode district, about 7 miles from Watford. 6 other towns we cover are within 25 miles.
From St Albans we also cover Harpenden (5 miles away), Hatfield (5 miles) and Hemel Hempstead (5 miles).
Whatever the exposure of your street, the details at sills, eaves and the base of the wall are what keep an EWI system dry, and we draw them before work starts.
Nearby towns we cover: Harpenden (5 miles), Hatfield (5 miles), Hemel Hempstead (5 miles), North Watford (5 miles), Welwyn Garden City (6 miles), Borehamwood (7 miles).
External wall insulation prices in St Albans
Guide prices for external wall insulation in St Albans 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.
What moves the price most is the board and finish you choose, the access around the house, and details such as roofline extensions or moving a gas meter.
Popular services in St Albans
- EPS insulated render
- Insulated cladding
- Silicone render finish
- Solid wall insulation
- Non-traditional houses
- Terraced house EWI
- Detached house EWI
- Social housing EWI
- EWI for landlords
- Failed EWI remediation
- All 24 services
Rules that apply in St Albans
- 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 St Albans: questions
How much should I budget for external wall insulation in St Albans?
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 St Albans and fixes the total in writing.
Do you cover Harpenden as well as St Albans?
Yes. From St Albans we also cover Harpenden, Hatfield and Hemel Hempstead, and the rest of Hertfordshire.
Which EWI system suits homes in St Albans?
It depends on the walls. Most brick houses in St Albans 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.