External wall insulation in Portishead
Looking for external wall insulation in Portishead? We survey homes across Somerset and the BS20 postcode district, measure every wall and give you a fixed price in writing before any work is booked.
Homes in and around Portishead
Portishead is in the BS20 postcode district, about 19 miles from Bath. 6 other towns we cover are within 25 miles.
From Portishead we also cover Nailsea (3 miles away), Clevedon (5 miles) and Westbury-on-Trym (6 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: Nailsea (3 miles), Clevedon (5 miles), Westbury-on-Trym (6 miles), Henbury (7 miles), Clifton (7 miles), Redland (7 miles).
External wall insulation prices in Portishead
Guide prices for external wall insulation in Portishead 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.
Whole-house prices include standard scaffolding, beads, sills and refitting services; unusual access, footpath licences and wall repairs are quoted separately.
Popular services in Portishead
- EWI installation
- EPS insulated render
- Mineral wool EWI
- Wood fibre EWI
- Insulating lime render
- Solid wall insulation
- Non-traditional houses
- Bungalow EWI
- Flats & low-rise blocks
- Social housing EWI
- All 24 services
Rules that apply in Portishead
- Building regulations
- Insulating more than half of a wall, or more than a quarter of the whole building envelope, counts as renovating a thermal element under the Building Regulations, so the wall should reach 0.30 W/m²K where that is technically, functionally and economically feasible, and building control must be involved.
- 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 Portishead: questions
How much should I budget for external wall insulation in Portishead?
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 Portishead and fixes the total in writing.
Do you cover Nailsea as well as Portishead?
Yes. From Portishead we also cover Nailsea, Clevedon and Westbury-on-Trym, and the rest of Somerset.
How long will the work take in Portishead?
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.