Solid wall insulation · Wales
Solid wall insulation in Mid Glamorgan
Solid wall insulation across Mid Glamorgan: measured survey, clear specification and a fixed written price before any work starts. For Mid Glamorgan homeowners weighing external against internal insulation, the survey sets out both with prices.
- Free survey and fixed written price
- Guide price from £75 per m² + scaffold, 0% VAT
- Planning and building control checked for Wales
Free survey in Mid Glamorgan
Tell us the postcode and what you need.
What the job covers
- Internal insulation suits single rooms or where the outside can't change
- Breathable options for stone and lime-mortared walls
- Both can be done in stages, elevation by elevation or room by room
- External insulation keeps room sizes and treats cold bridges well
- Solid walls can lose heat roughly twice as fast as an insulated cavity wall
Local considerations in Mid Glamorgan
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.
For solid-walled homes in Mid Glamorgan, we check wall thickness and age first to confirm there's no cavity to fill.
- Nation
- Wales
- Region
- South Wales
- Towns covered
- Rhondda, Bridgend, Merthyr Tydfil, Aberdare, Pontypridd, Maesteg
- Guide price
- From £75 per m² + scaffold · 0% VAT
Planning and building control in Wales
Permitted development rules for houses in Wales are similar to England's: a similar-appearance finish on a house is often permitted, while conservation areas, National Parks, Areas of Outstanding Natural Beauty, flats, commercial buildings and listed buildings need permission or consent. Your local planning authority has the final word.
The Building Regulations as they apply in Wales treat insulating or re-rendering more than half of a wall's area, or more than a quarter of the building's whole envelope, as renovating a thermal element, with Approved Document L (Wales) setting the target. Building control is involved before work starts.
What does solid wall insulation cost?
External systems run at roughly £105–£210 per m² of wall depending on the board and finish. Internal insulation is roughly £75–£130 per m², plus the cost of moving radiators, sockets and kitchen units.
Solid wall insulation prices in Mid Glamorgan
| Item | Guide price | Notes |
|---|---|---|
| External (EWI) | £105–£210 per m²0% VAT | By board and finish |
| Internal (IWI) | £75–£130 per m²0% VAT | Plus making good |
| Survey and written recommendation | Free with a quote |
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.
Solid wall insulation in Mid Glamorgan: questions
Can I do one wall at a time?
Yes. Many owners start with the coldest or most exposed elevation, often a gable end.
Does solid wall insulation cause condensation?
It can if detailed poorly, particularly internally. A condensation risk check for the proposed build-up and careful detailing at joists, reveals and corners avoid it.
Can I get a grant for solid wall insulation?
Some schemes cover it for eligible households — for example ECO4 until 31 December 2026, Home Energy Scotland's grant and loan, Wales' Warm Homes Nest and NI's Affordable Warmth Scheme. Each has its own eligibility and installer rules; see our grants guide.
Do you cover all of Mid Glamorgan?
Yes. We survey and quote solid wall insulation across Mid Glamorgan, including Rhondda, Bridgend, Merthyr Tydfil, Aberdare, Pontypridd.
Do I need planning permission in Wales?
Permitted development rules for houses in Wales are similar to England's: a similar-appearance finish on a house is often permitted, while conservation areas, National Parks, Areas of Outstanding Natural Beauty, flats, commercial buildings and listed buildings need permission or consent. We check your address before quoting.