External wall insulation in Derry
Looking for external wall insulation in Derry? We survey homes across County Londonderry and the BT48 postcode district, measure every wall and give you a fixed price in writing before any work is booked.
Homes in and around Derry
Derry is in the BT48 postcode district. 2 other towns we cover are within 25 miles.
County Londonderry has some of the UK's more exposed locations for wind-driven rain, which shapes the render and detailing we specify.
Nearby towns we cover: Strabane (14 miles), Limavady (15 miles).
External wall insulation prices in Derry
Guide prices for external wall insulation in Derry 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 Derry
- EWI installation
- Phenolic EWI
- Brick slip EWI
- Pebbledash & dry dash EWI
- Solid wall insulation
- Bungalow EWI
- Flats & low-rise blocks
- Social housing EWI
- Failed EWI remediation
- EWI surveys
- All 24 services
Rules that apply in Derry
- Funding
- The Affordable Warmth Scheme, delivered through councils for the Housing Executive, helps owner-occupiers and private tenants with household income under £23,000, with grants up to £10,000 where solid wall insulation is needed. Approval must be in writing before work starts, and the council arranges the work through its own process. 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 Derry: questions
How much should I budget for external wall insulation in Derry?
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 Derry and fixes the total in writing.
Do you cover Strabane as well as Derry?
Yes. From Derry we also cover Strabane and Limavady, and the rest of County Londonderry.
Which EWI system suits homes in Derry?
It depends on the walls. Most brick houses in Derry 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.