External wall insulation in Belfast
If you live in Belfast (BT1) 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 Belfast
Belfast is in the BT1 postcode district. 6 other towns we cover are within 25 miles.
We arrange surveys in Belfast (BT1) at a time that suits you, and cover neighbouring Castlereagh, Newtownabbey and Lisburn too.
In exposed parts of County Antrim, 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: Castlereagh (2 miles), Newtownabbey (4 miles), Lisburn (7 miles), Newtownards (9 miles), Carrickfergus (10 miles), Bangor, Down (11 miles).
External wall insulation prices in Belfast
Guide prices for external wall insulation in Belfast 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.
Brick slips, cladding and mineral wool cost more than EPS and render; the survey shows you the difference side by side.
Popular services in Belfast
- EWI installation
- EPS insulated render
- Mineral wool EWI
- Phenolic EWI
- Brick slip EWI
- Insulated cladding
- Insulating lime render
- Terraced house EWI
- Flats & low-rise blocks
- EWI for landlords
- All 24 services
Rules that apply in Belfast
- Building regulations
- EWI is controlled under the Building Regulations (Northern Ireland) 2012, with energy standards in Technical Booklet F and fire in Technical Booklet E, so you need building control approval from your council.
- 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 Belfast: questions
How much should I budget for external wall insulation in Belfast?
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 Belfast and fixes the total in writing.
Do you cover Castlereagh as well as Belfast?
Yes. From Belfast we also cover Castlereagh, Newtownabbey and Lisburn, and the rest of County Antrim.
How long will the work take in Belfast?
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.