Mineral wool EWI · Dyfed
Mineral wool external wall insulation in Ammanford
Need mineral wool external wall insulation in Ammanford? Tell us about the property and we'll arrange a free survey and a written quote. Older solid-walled homes in Ammanford can suit a vapour-open mineral wool build-up better than foam; the survey checks the wall first.
- Free survey in SA18 and nearby
- Guide price from £125 per m² + scaffold, 0% VAT
- Fixed written price before work starts
Free survey in Ammanford
Postcode, service and a phone number is all we need.
Part of every quote
- Finished in mineral or silicone render, or brick slip
- Used on blocks of flats and buildings with storeys above 11m
- Better sound reduction than foam boards
- Vapour-open, so moisture in solid walls can dry outwards
Ammanford: walls, weather and approvals
As well as Ammanford itself, we quote in Gorseinon, Llanelli and Neath. Ammanford is about 11 miles from Llanelli. West Wales has a high share of older solid-walled and stone homes, many in exposed coastal or rural settings.
Parts of Dyfed 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.
On blocks and taller buildings in Ammanford, mineral wool is the default because of the fire guidance for external walls.
- Postcode district
- SA18
- County or area
- Dyfed
- Nation
- Wales
- Nearby
- Gorseinon, Llanelli, Neath, Swansea
Planning and building control in Wales
For homes in Ammanford, the local planning authority decides any borderline cases; changing a brick house to render, or work on flats, usually needs an application in Wales.
Welsh Building Regulations expect walls to be upgraded when a substantial area is renewed, and building control signs the work off.
Wales applies its own external wall fire rules, updated in 2025; on taller residential buildings we specify non-combustible mineral wool systems.
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 Ammanford
| 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.
What happens next
Tell us about the property
Use the quote tool or form, or call. Photos help.
Free survey
We measure, check the walls and confirm approvals.
Fixed written quote
System, details, access, exclusions and VAT in writing.
Installation
Scheduled for suitable weather, with a clear programme.
Mineral wool EWI in Ammanford: questions
Can mineral wool EWI have a brick finish?
Yes. Brick slips can be bonded over mineral wool systems designed for them, with additional fixings for the extra weight.
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.
Do you cover Ammanford?
Yes — we survey and quote mineral wool external wall insulation in Ammanford (SA18) and nearby Gorseinon, Llanelli and Neath, with a fixed written price before any work starts.