EPS insulation · Mid Glamorgan
EPS external wall insulation in Merthyr Tydfil
If you're planning EPS external wall insulation in Merthyr Tydfil, 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 Merthyr Tydfil, grey EPS can sometimes avoid the cost of extending the roofline.
- Free survey in CF47 and nearby
- Guide price from £105 per m² + scaffold, 0% VAT
- Fixed written price before work starts
Free survey in Merthyr Tydfil
Postcode, service and a phone number is all we need.
What you get
- Finished in silicone, acrylic, mineral render or brick slip
- Thermal conductivity around 0.031–0.038 W/mK depending on grade
- Light boards mean fewer fixings and a faster install
- Easy to shape around bays, arches and reveals
Homes and walls in Merthyr Tydfil
We also cover Aberdare and Rhondda, close to Merthyr Tydfil. Merthyr Tydfil sits around 7 miles from Rhondda. South Wales has long runs of solid-wall valley terraces, Victorian and Edwardian town housing and post-war council estates.
Parts of Mid Glamorgan 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.
We compare EPS against mineral wool for each Merthyr Tydfil enquiry rather than assuming one board suits every wall.
- Postcode district
- CF47
- County or area
- Mid Glamorgan
- Nation
- Wales
- Nearby
- Aberdare, Rhondda, Ebbw Vale, Pontypridd
Wales: planning and regulations
Householder rules in Wales are similar to England's: in Merthyr Tydfil, a similar-looking finish on a house is often permitted, but conservation areas, flats and listed buildings need permission or consent.
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.
What is EPS insulation?
Expanded polystyrene is a closed-cell foam made from beads that are expanded and moulded into boards. White EPS is the standard grade; grey EPS has graphite added, which reflects radiant heat and improves performance by roughly 15–20%, so a thinner board does the same job. Both are used inside certified render systems where the board, adhesive, fixings, mesh and finish are tested together by the manufacturer.
EPS external wall insulation prices in Merthyr Tydfil
| 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
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.
EPS insulation in Merthyr Tydfil: questions
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.
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 Merthyr Tydfil?
Yes — we survey and quote EPS external wall insulation in Merthyr Tydfil (CF47) and nearby Aberdare, Rhondda and Ebbw Vale, with a fixed written price before any work starts.