External wall insulation · County Antrim
External wall insulation in Carrickfergus
We quote external wall insulation for homes in Carrickfergus (BT38) and nearby Holywood and Newtownabbey, with guide prices online and a free survey to fix the price. Whole-house jobs and single elevations are both quoted in Carrickfergus; a cold gable or rear wall can be done on its own where it suits.
- Free survey in BT38 and nearby
- Guide price from £105 per m² + scaffold, 0% VAT
- Fixed written price before work starts
Free survey in Carrickfergus
Postcode, service and a phone number is all we need.
Part of every quote
- Installing wall insulation in homes is currently zero-rated for VAT until 31 March 2027
- Work happens outside, so you can live at home throughout
- Covers tired brick, pebble dash or failing render with a new finish
- Cills, pipes, vents, meter boxes and the roofline detailed as part of the job
Local considerations in Carrickfergus
We also cover Holywood and Newtownabbey, close to Carrickfergus. Carrickfergus sits around 10 miles from Belfast. Northern Ireland has many rendered and pebble-dashed homes, older solid-walled rural houses, and estates built by the Housing Executive.
Parts of County Antrim fall in the higher wind-driven rain exposure bands, especially coastal and upland sites, so render specification, movement joints and detailing at cills, verges and the base of the wall matter more than usual.
We plan EWI in Carrickfergus around the details that cause trouble later — cills, eaves, downpipes and the base of the wall above the damp-proof course.
- Postcode district
- BT38
- County or area
- County Antrim
- Nation
- Northern Ireland
- Nearby
- Holywood, Newtownabbey, Bangor (County Down), Belfast
Permissions in Northern Ireland
Before quoting in Carrickfergus, we check whether the property is listed or in a conservation area, which changes what needs planning permission in Northern Ireland.
Building control applies to insulation and major re-rendering in Northern Ireland, and the work is signed off by the council.
What finish can I have?
Most EWI is finished in a thin-coat silicone render in a through-coloured shade, with a 1–2mm grain. Acrylic, mineral (painted), dry-dash and brick-slip finishes are also available. Where planning wants a brick look, brick slips over the insulation keep the street appearance.
External wall insulation prices in Carrickfergus
| Item | Guide price | Notes |
|---|---|---|
| EPS system with silicone render | £105–£145 per m²0% VAT | Most common choice for houses |
| Mineral wool system | £125–£170 per m²0% VAT | Non-combustible, vapour-open |
| Brick-slip finish over insulation | £185–£260 per m²0% VAT | Where a brick look is wanted |
| Three-bed semi, EPS + silicone (incl. scaffold) | £10,200–£17,7000% VAT | 80–100 m² of wall; depends on detailing and access |
Confirmed by a fixed written quote after survey. 0% VAT: installing insulation in a home is zero-rated until 31 March 2027, so these figures are the total; 5% applies from 1 April 2027.
How it works
Enquiry
Send your postcode and a few details.
Measured survey
Walls, damp, eaves, cills and services recorded.
Written price
A fixed price with the specification attached.
Work and handover
Installed, inspected and documents handed over.
External wall insulation in Carrickfergus: questions
Can EWI go over pebble dash?
Usually yes. The dash is tested for adhesion and hollow areas; sound dash can be insulated over with additional mechanical fixings, while loose areas are removed first.
Does external wall insulation cause damp?
Not when it is specified and detailed properly. Problems usually come from poor detailing: no starter track above the damp-proof course, gaps at cills and penetrations, or a vapour-closed system on a wall that needs to breathe. The survey checks moisture, ground levels and the wall type before a system is chosen.
How much does external wall insulation cost?
Our guide price for EWI is £105–£170 per m² of wall depending on the system, plus scaffolding. A typical three-bed semi with EPS and silicone render comes to roughly £10,200–£17,700 for the whole house, including scaffold. Installing insulation in a home is zero-rated for VAT until 31 March 2027, so that's the total. You get a fixed written price after a free survey.
Do you cover Carrickfergus?
Yes — we survey and quote external wall insulation in Carrickfergus (BT38) and nearby Holywood, Newtownabbey and Bangor (County Down), with a fixed written price before any work starts.