External wall insulation in Portsmouth
Looking for external wall insulation in Portsmouth? We survey homes across Hampshire and the PO1 postcode district, measure every wall and give you a fixed price in writing before any work is booked.
Homes in and around Portsmouth
Portsmouth is in the PO1 postcode district, about 15 miles from Southampton. 6 other towns we cover are within 25 miles.
From Portsmouth we also cover Gosport (2 miles away), Fareham (5 miles) and Ryde (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: Gosport (2 miles), Fareham (5 miles), Ryde (6 miles), Havant (6 miles), Waterlooville (6 miles), Cowes (9 miles).
External wall insulation prices in Portsmouth
Guide prices for external wall insulation in Portsmouth 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.
Bays, gables, conservatory junctions and narrow side passages take longer than plain walls, so the survey prices your actual house rather than an average.
Popular services in Portsmouth
- EPS insulated render
- Phenolic EWI
- Wood fibre EWI
- Brick slip EWI
- Mineral & silicate render
- Pebbledash & dry dash EWI
- Non-traditional houses
- Terraced house EWI
- Failed EWI remediation
- EWI surveys
- All 24 services
Rules that apply in Portsmouth
- 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 Portsmouth: questions
How much should I budget for external wall insulation in Portsmouth?
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 Portsmouth and fixes the total in writing.
Do you cover Gosport as well as Portsmouth?
Yes. From Portsmouth we also cover Gosport, Fareham and Ryde, and the rest of Hampshire.
How long will the work take in Portsmouth?
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.