Mineral wool EWI · County Antrim
Mineral wool external wall insulation in Carrickfergus
We quote mineral wool 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. On blocks and taller buildings in Carrickfergus, mineral wool is the default because of the fire guidance for external walls.
- Free survey in BT38 and nearby
- Guide price from £125 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.
What the job covers
- Non-combustible board (typically Euroclass A1 or A2-s1,d0 as part of the system)
- Used on blocks of flats and buildings with storeys above 11m
- Heavier than EPS, so more fixings and careful handling
- Vapour-open, so moisture in solid walls can dry outwards
Carrickfergus: walls, weather and approvals
Surveys in Carrickfergus also cover the surrounding BT38 district and towns such as Holywood and Newtownabbey. It's roughly 10 miles from Carrickfergus 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.
For homes in Carrickfergus near busy roads, mineral wool's sound reduction can be a reason to choose it.
- Postcode district
- BT38
- County or area
- County Antrim
- Nation
- Northern Ireland
- Nearby
- Holywood, Newtownabbey, Bangor (County Down), Belfast
Planning and building control in Northern Ireland
In Northern Ireland, permitted development is set by the 2015 Order; in Carrickfergus, 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.
What about noise?
Dense mineral wool adds mass and absorbs sound, so homes beside main roads or railways often notice a quieter interior, particularly where windows are also upgraded. The improvement depends on the whole wall and windows, so we don't quote decibel figures without testing.
Mineral wool external wall insulation prices in Carrickfergus
| 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.
From enquiry to finished wall
Get a guide price
Try the online quote tool for a ballpark figure.
Book the survey
A visit at a time that suits you.
Agree the quote
Nothing starts until you've signed the written price.
We do the work
Planned around weather, with you kept informed.
Mineral wool EWI in Carrickfergus: 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 Carrickfergus?
Yes — we survey and quote mineral wool external wall insulation in Carrickfergus (BT38) and nearby Holywood, Newtownabbey and Bangor (County Down), with a fixed written price before any work starts.