Mineral wool EWI · Clwyd
Mineral wool external wall insulation in Deeside
Mineral wool external wall insulation in Deeside: free survey, written specification and a fixed price, with the details that keep walls dry planned from the start. On blocks and taller buildings in Deeside, mineral wool is the default because of the fire guidance for external walls.
- Free survey in CH5 and nearby
- Guide price from £125 per m² + scaffold, 0% VAT
- Fixed written price before work starts
Free survey in Deeside
Postcode, service and a phone number is all we need.
What's included
- Better sound reduction than foam boards
- Used on blocks of flats and buildings with storeys above 11m
- Finished in mineral or silicone render, or brick slip
- Heavier than EPS, so more fixings and careful handling
Homes and walls in Deeside
We cover Deeside and nearby Hawarden, Buckley and Flint. It's roughly 11 miles from Deeside to Wrexham, the largest town in Clwyd. 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.
Older solid-walled homes in Deeside can suit a vapour-open mineral wool build-up better than foam; the survey checks the wall first.
- Postcode district
- CH5
- County or area
- Clwyd
- Nation
- Wales
- Nearby
- Hawarden, Buckley, Flint, Wrexham
Planning and building control in Wales
Householder rules in Wales are similar to England's: in Deeside, a similar-looking finish on a house is often permitted, but conservation areas, flats and listed buildings need permission or consent.
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.
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 Deeside
| 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
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 Deeside: 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.
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 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.
Do you cover Deeside?
Yes — we survey and quote mineral wool external wall insulation in Deeside (CH5) and nearby Hawarden, Buckley and Flint, with a fixed written price before any work starts.