Mineral wool EWI · County Antrim
Mineral wool external wall insulation in Antrim
If you're planning mineral wool external wall insulation in Antrim, start with a free survey: we measure, check the walls and confirm planning and building control for your address. On blocks and taller buildings in Antrim, mineral wool is the default because of the fire guidance for external walls.
- Free survey in BT41 and nearby
- Guide price from £125 per m² + scaffold, 0% VAT
- Fixed written price before work starts
Free survey in Antrim
Postcode, service and a phone number is all we need.
Included as standard
- Non-combustible board (typically Euroclass A1 or A2-s1,d0 as part of the system)
- Better sound reduction than foam boards
- Used on blocks of flats and buildings with storeys above 11m
- Vapour-open, so moisture in solid walls can dry outwards
Antrim: walls, weather and approvals
Surveys in Antrim also cover the surrounding BT41 district and towns such as Ballymena and Newtownabbey. It's roughly 14 miles from Antrim to Belfast, the largest town in County Antrim. 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.
Older solid-walled homes in Antrim can suit a vapour-open mineral wool build-up better than foam; the survey checks the wall first.
- Postcode district
- BT41
- County or area
- County Antrim
- Nation
- Northern Ireland
- Nearby
- Ballymena, Newtownabbey, Belfast, Lisburn
Northern Ireland: planning and regulations
In Northern Ireland, permitted development is set by the 2015 Order; in Antrim, changing a house's external appearance, and any work on flats or listed buildings, may need permission, so we check with the council.
Building control applies to insulation and major re-rendering in Northern Ireland, and the work is signed off by the council.
On taller buildings in Northern Ireland we specify non-combustible mineral wool systems and confirm the classification with building control, in line with Technical Booklet E.
Why choose mineral wool over EPS?
Two reasons come up most: fire and moisture. Mineral wool doesn't burn, which is why guidance for taller residential buildings points to non-combustible external wall materials. It is also vapour-open, so a solid wall that holds some moisture can keep drying outwards through the insulation and render.
The trade-offs are weight and cost. Slabs are denser, need more fixings and take longer to install, so the price per m² is higher than EPS.
Mineral wool external wall insulation prices in Antrim
| Item | Guide price | Notes |
|---|---|---|
| Mineral wool + mineral or silicone render | £125–£170 per m²0% VAT | Excluding scaffold |
| Mineral wool + brick slip | £195–£260 per m²0% VAT | Heavier slip systems need extra fixings |
| Three-bed semi, full house | £11,800–£20,2000% VAT | 80–100 m² of wall, including scaffold |
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.
Mineral wool EWI in Antrim: questions
Is mineral wool better than EPS?
Not always better — different. Mineral wool wins on fire performance, breathability and acoustics; EPS wins on cost, weight and thinner boards for the same U-value. The wall, the building height and your priorities decide it.
Does mineral wool get wet?
It is water-repellent and protected by the render system. Like any insulation it must not be left exposed to rain during installation, so boards are covered and work stops in wet weather.
Is mineral wool needed for a bungalow?
Rarely for fire reasons. It may still be chosen on a damp-prone solid wall where a vapour-open build-up is wanted.
Do you cover Antrim?
Yes — we survey and quote mineral wool external wall insulation in Antrim (BT41) and nearby Ballymena, Newtownabbey and Belfast, with a fixed written price before any work starts.