External wall insulation in Rhondda
Homeowners in Rhondda look at external wall insulation for warmer rooms, lower heat loss and a new exterior in one job. Here is how it works, what it costs and which Wales rules apply.
Homes in and around Rhondda
Rhondda is in the CF42 postcode district. 6 other towns we cover are within 25 miles.
Our Rhondda surveys cover the CF42 district and the surrounding area, including Tonypandy, Aberdare and Pontypridd.
Mid Glamorgan has some of the UK's more exposed locations for wind-driven rain, which shapes the render and detailing we specify.
Nearby towns we cover: Tonypandy (3 miles), Aberdare (4 miles), Pontypridd (6 miles), Merthyr Tydfil (7 miles), Maesteg (10 miles), Caerphilly (11 miles).
External wall insulation prices in Rhondda
Guide prices for external wall insulation in Rhondda run from about £109 to £175 per square metre installed, depending on system and finish; scaffolding priced per house, with VAT at 0% on homes until 31 March 2027.
Whole-house prices include standard scaffolding, beads, sills and refitting services; unusual access, footpath licences and wall repairs are quoted separately.
Popular services in Rhondda
- EPS insulated render
- Phenolic EWI
- Silicone render finish
- Terraced house EWI
- Semi-detached EWI
- Park home insulation
- Flats & low-rise blocks
- Social housing EWI
- EWI for landlords
- Failed EWI remediation
- All 24 services
Rules that apply in Rhondda
- Funding
- Warm Homes Nest provides free improvements to low-income owner-occupiers and private tenants, and the Green Homes Wales pilot has offered interest-free loans to households above those thresholds. ECO4 closes on 31 December 2026. These schemes use their own approved installers; our quotes are for privately funded work unless we confirm otherwise in writing. Grants guide
- VAT
- Installing insulation in a home is zero-rated for VAT until 31 March 2027, then 5%.
Checked October 2026. Rules change, so we confirm them for your address at survey.
External wall insulation in Rhondda: questions
How much should I budget for external wall insulation in Rhondda?
Budget around £109–£175 per square metre of wall for the system and finish, plus scaffolding priced per house. The survey measures your walls in Rhondda and fixes the total in writing.
Do you cover Tonypandy as well as Rhondda?
Yes. From Rhondda we also cover Tonypandy, Aberdare and Pontypridd, and the rest of Mid Glamorgan.
Which EWI system suits homes in Rhondda?
It depends on the walls. Most brick houses in Rhondda suit EPS with silicone render; older stone or lime-built walls suit wood fibre or insulating lime render; and blocks need mineral wool. The free survey recommends one and explains why.