External wall insulation in Swansea
If you live in Swansea (SA1) and your walls are solid, system-built or simply cold, external wall insulation may be the most effective upgrade you can make without losing any room inside.
Homes in and around Swansea
Swansea is in the SA1 postcode district. 6 other towns we cover are within 25 miles.
We arrange surveys in Swansea (SA1) at a time that suits you, and cover neighbouring Briton Ferry, Gorseinon and Neath too.
In exposed parts of West Glamorgan, we pay particular attention to how rain is shed at the eaves, sills and corners, where wind-driven water finds its way in.
Nearby towns we cover: Briton Ferry (5 miles), Gorseinon (5 miles), Neath (7 miles), Llanelli (10 miles), Ammanford (12 miles), Maesteg (12 miles).
External wall insulation prices in Swansea
Guide prices for external wall insulation in Swansea 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 Swansea
- EPS insulated render
- Mineral wool EWI
- Wood fibre EWI
- Mineral & silicate render
- Terraced house EWI
- Semi-detached EWI
- Park home insulation
- Flats & low-rise blocks
- EWI for landlords
- EWI surveys
- All 24 services
Rules that apply in Swansea
- Building regulations
- Wales has its own Building Regulations and Approved Document L. Renovating a large part of an external wall brings the energy standards into play, so building control approval is needed for EWI.
- 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 Swansea: questions
How much should I budget for external wall insulation in Swansea?
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 Swansea and fixes the total in writing.
Do you cover Briton Ferry as well as Swansea?
Yes. From Swansea we also cover Briton Ferry, Gorseinon and Neath, and the rest of West Glamorgan.
How long will the work take in Swansea?
Two to six weeks on site for most houses, depending on size: bungalows are quicker, detached houses longer, weather allowing. Render isn't applied in rain or frost.