Internal wall insulation · West Glamorgan
Internal wall insulation in Gorseinon
Homeowners and landlords in Gorseinon can get a free survey and a fixed written quote for internal wall insulation, covering SA4 and the surrounding area. For terraced homes in Gorseinon with attractive brick fronts, one approach is to insulate the front internally and the rear externally.
- Free survey in SA4 and nearby
- Guide price from £75 per m² 0% VAT
- Fixed written price before work starts
Free survey in Gorseinon
Postcode, service and a phone number is all we need.
Included as standard
- Needs careful detailing at floor joists, reveals and corners
- Sockets, radiators, skirting and coving are moved and refitted
- Loses roughly 50–100mm per insulated wall
- Keeps the outside of the house exactly as it is
Local considerations in Gorseinon
Surveys in Gorseinon also cover the surrounding SA4 district and towns such as Llanelli and Swansea. Gorseinon sits around 5 miles from Swansea. South Wales has long runs of solid-wall valley terraces, Victorian and Edwardian town housing and post-war council estates.
Parts of West 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 plan internal insulation in Gorseinon homes room by room so you keep the rest of the house usable.
- Postcode district
- SA4
- County or area
- West Glamorgan
- Nation
- Wales
- Nearby
- Llanelli, Swansea, Ammanford, Briton Ferry
Permissions in Wales
Planning isn't usually involved with internal insulation. Building control is, once more than half of a wall is treated, and listed buildings need listed building consent.
Do I need Building Regulations approval?
Yes, in England and Wales once you insulate or replaster more than half of a wall's area (or more than a quarter of the building's whole envelope), it's treated as renovating a thermal element. The wall should reach about 0.30 W/m²K where practical, and building control needs to be involved.
Internal wall insulation prices in Gorseinon
| Item | Guide price | Notes |
|---|---|---|
| Insulated plasterboard, supplied and skimmed | £75–£110 per m²0% VAT | |
| Insulated stud wall | £90–£130 per m²0% VAT | |
| Typical bedroom, one external wall | £1,795–£2,9950% VAT | Including making good |
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
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.
Internal wall insulation in Gorseinon: questions
Can I stay in the house?
Yes, but each room is out of use while it's worked on, typically 3–5 days.
How much room space will I lose?
Usually 50–100mm on each insulated wall, depending on the system.
Is internal insulation cheaper than external?
Per m² usually yes, but the cost of moving fittings and redecorating narrows the gap on whole-house jobs.
Do you cover Gorseinon?
Yes — we survey and quote internal wall insulation in Gorseinon (SA4) and nearby Llanelli, Swansea and Ammanford, with a fixed written price before any work starts.