EPS insulation · Dyfed
EPS external wall insulation in Carmarthen
Looking for EPS external wall insulation in Carmarthen? We survey homes across Carmarthen and the SA31 area, then give you a fixed written price before any work starts. We compare EPS against mineral wool for each Carmarthen enquiry rather than assuming one board suits every wall.
- Free survey in SA31 and nearby
- Guide price from £105 per m² + scaffold, 0% VAT
- Fixed written price before work starts
Free survey in Carmarthen
Postcode, service and a phone number is all we need.
Part of every quote
- Used on low-rise houses; combustible, so not for taller buildings
- Thermal conductivity around 0.031–0.038 W/mK depending on grade
- Easy to shape around bays, arches and reveals
- Grey graphite EPS reaches a given U-value with a thinner board
Before we quote in Carmarthen
We also cover Llanelli and Ammanford, close to Carmarthen. It's roughly 14 miles from Carmarthen to Llanelli, the largest town in Dyfed. 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.
EPS is a common choice for two-storey houses, mainly on cost and weight, and we price it alongside mineral wool for homes in Carmarthen.
- Postcode district
- SA31
- County or area
- Dyfed
- Nation
- Wales
- Nearby
- Llanelli, Ammanford, Gorseinon, Swansea
Planning and building control in Wales
We check Carmarthen 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.
How thick does the board need to be?
On a 225mm solid brick wall, around 90mm of grey EPS or 100–110mm of white EPS typically gets close to 0.30 W/m²K. Stone walls, concrete panels and hollow-block walls start from different points, so the system supplier's calculation for your wall sets the final thickness.
EPS external wall insulation prices in Carmarthen
| Item | Guide price | Notes |
|---|---|---|
| EPS + silicone render | £105–£145 per m²0% VAT | Excluding scaffold |
| Grey EPS uplift | +£4–£8 per m²0% VAT | Thinner board for the same U-value |
| Bungalow, full house | £6,700–£12,8000% VAT | 55–75 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.
How it works
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.
EPS insulation in Carmarthen: questions
Is EPS insulation safe on a house?
EPS is used inside render systems that are fire-tested as a whole. On low-rise houses it is widely used. On taller buildings, or where guidance calls for non-combustible materials, mineral wool systems are specified instead.
How long does EPS last on a wall?
The board itself doesn't degrade when protected by the render system. Service life depends on the render, sealants and detailing, typically 25–30 years or more with maintenance.
Will woodpeckers damage EPS?
It happens occasionally, especially near woodland. Damage is to the render and board surface and is repaired with a mesh patch and colour-matched finish.
Do you cover Carmarthen?
Yes — we survey and quote EPS external wall insulation in Carmarthen (SA31) and nearby Llanelli, Ammanford and Gorseinon, with a fixed written price before any work starts.