Mineral wool EWI · Clwyd
Mineral wool external wall insulation in Wrexham
From Wrexham to Rhosllanerchrugog, we price mineral wool external wall insulation after a measured survey — no guesswork, and no work starts until the price is agreed in writing. Older solid-walled homes in Wrexham can suit a vapour-open mineral wool build-up better than foam; the survey checks the wall first.
- Free survey in LL11 and nearby
- Guide price from £125 per m² + scaffold, 0% VAT
- Fixed written price before work starts
Free survey in Wrexham
Postcode, service and a phone number is all we need.
Included as standard
- Vapour-open, so moisture in solid walls can dry outwards
- Used on blocks of flats and buildings with storeys above 11m
- Heavier than EPS, so more fixings and careful handling
- Better sound reduction than foam boards
Before we quote in Wrexham
As well as Wrexham itself, we quote in Rhosllanerchrugog, Buckley and Hawarden. North Wales has many solid stone and slate-built homes, Victorian seaside terraces and post-war council estates.
Exposure to wind-driven rain varies across Clwyd: sheltered town streets fare better than walls on high ground or facing the prevailing weather, and the render, beads and cill details are chosen with that in mind.
For homes in Wrexham near busy roads, mineral wool's sound reduction can be a reason to choose it.
- Postcode district
- LL11
- County or area
- Clwyd
- Nation
- Wales
- Nearby
- Rhosllanerchrugog, Buckley, Hawarden, Deeside
Wales: planning and regulations
For homes in Wrexham, the local planning authority decides any borderline cases; changing a brick house to render, or work on flats, usually needs an application in Wales.
In Wales, insulating or re-rendering more than half of a wall's area is treated as renovating a thermal element under Approved Document L (Wales), so building control is involved before work starts.
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 Wrexham
| 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
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 Wrexham: questions
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.
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.
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 Wrexham?
Yes — we survey and quote mineral wool external wall insulation in Wrexham (LL11) and nearby Rhosllanerchrugog, Buckley and Hawarden, with a fixed written price before any work starts.