Mineral wool EWI · Powys
Mineral wool external wall insulation in Newtown
Looking for mineral wool external wall insulation in Newtown? We survey homes across Newtown and the SY16 area, then give you a fixed written price before any work starts. On blocks and taller buildings in Newtown, mineral wool is the default because of the fire guidance for external walls.
- Free survey in SY16 and nearby
- Guide price from £125 per m² + scaffold, 0% VAT
- Fixed written price before work starts
Free survey in Newtown
Postcode, service and a phone number is all we need.
What the job covers
- Vapour-open, so moisture in solid walls can dry outwards
- Heavier than EPS, so more fixings and careful handling
- Used on blocks of flats and buildings with storeys above 11m
- Finished in mineral or silicone render, or brick slip
Before we quote in Newtown
Surveys in Newtown also cover the surrounding SY16 district and towns such as Welshpool and Llandrindod Wells. Mid Wales is largely rural, with stone farmhouses, cottages and market-town terraces, many of them solid-walled.
Parts of Powys 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 Newtown can suit a vapour-open mineral wool build-up better than foam; the survey checks the wall first.
- Postcode district
- SY16
- County or area
- Powys
- Nation
- Wales
- Nearby
- Welshpool, Llandrindod Wells, Aberystwyth, Rhosllanerchrugog
Planning and building control in Wales
We check Newtown addresses for conservation areas and listing before quoting, because Welsh permitted development rules don't cover every external change.
Building control in Wales applies to most insulation and re-rendering jobs of this size; the quote states who submits the notice.
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 Newtown
| 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 Newtown: 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.
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.
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.
Do you cover Newtown?
Yes — we survey and quote mineral wool external wall insulation in Newtown (SY16) and nearby Welshpool, Llandrindod Wells and Aberystwyth, with a fixed written price before any work starts.