EPS insulation · South Glamorgan
EPS external wall insulation in Penarth
If you're planning EPS external wall insulation in Penarth, start with a free survey: we measure, check the walls and confirm planning and building control for your address. Where eaves are shallow on a house in Penarth, grey EPS can sometimes avoid the cost of extending the roofline.
- Free survey in CF64 and nearby
- Guide price from £105 per m² + scaffold, 0% VAT
- Fixed written price before work starts
Free survey in Penarth
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
- Light boards mean fewer fixings and a faster install
- Grey graphite EPS reaches a given U-value with a thinner board
- Thermal conductivity around 0.031–0.038 W/mK depending on grade
Homes and walls in Penarth
We cover Penarth and nearby Cardiff, Barry and Caerphilly. It's roughly 3 miles from Penarth to Cardiff, the largest town in South Glamorgan. South Wales has long runs of solid-wall valley terraces, Victorian and Edwardian town housing and post-war council estates.
Exposure to wind-driven rain varies across South Glamorgan: 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.
We compare EPS against mineral wool for each Penarth enquiry rather than assuming one board suits every wall.
- Postcode district
- CF64
- County or area
- South Glamorgan
- Nation
- Wales
- Nearby
- Cardiff, Barry, Caerphilly, Risca
Approvals in Wales
For homes in Penarth, 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.
When is EPS the right choice?
EPS suits most two-storey houses, bungalows and park homes where the wall is sound and there are no fire-height restrictions. It is a good fit where eaves are shallow, because grey EPS can hit the target with less thickness. On buildings with a storey 11 metres or more above ground, or where the guidance asks for non-combustible materials, mineral wool is used instead.
EPS external wall insulation prices in Penarth
| 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 Penarth: questions
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.
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.
White or grey EPS?
Grey graphite EPS insulates better per millimetre, so it is the pick where space is tight at the eaves or around windows. White EPS is slightly cheaper and works well where the extra thickness isn't a problem.
Do you cover Penarth?
Yes — we survey and quote EPS external wall insulation in Penarth (CF64) and nearby Cardiff, Barry and Caerphilly, with a fixed written price before any work starts.