Internal wall insulation · Gwent
Internal wall insulation in Newport (Gwent)
If you're planning internal wall insulation in Newport (Gwent), start with a free survey: we measure, check the walls and confirm planning and building control for your address. For terraced homes in Newport (Gwent) with attractive brick fronts, one approach is to insulate the front internally and the rear externally.
- Free survey in NP20 and nearby
- Guide price from £75 per m² 0% VAT
- Fixed written price before work starts
Free survey in Newport (Gwent)
Postcode, service and a phone number is all we need.
What you get
- Can be done one room at a time during a renovation
- Loses roughly 50–100mm per insulated wall
- Keeps the outside of the house exactly as it is
- Sockets, radiators, skirting and coving are moved and refitted
Homes and walls in Newport (Gwent)
We also cover Risca and Cwmbran, close to Newport (Gwent). 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 Gwent: 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 plan internal insulation in Newport (Gwent) homes room by room so you keep the rest of the house usable.
- Postcode district
- NP20
- County or area
- Gwent
- Nation
- Wales
- Nearby
- Risca, Cwmbran, Pontypool, Caerphilly
Planning and building control in Wales
Internal insulation rarely needs planning permission, but in England and Wales insulating or replastering more than half of a wall's area involves building control, and listed buildings need consent for internal changes that affect their character.
What are the options for internal insulation?
- Insulated plasterboard — PIR or phenolic foam bonded to plasterboard, fixed to the wall and skimmed. Thinnest option.
- Insulated stud wall — a timber or metal frame filled with insulation, with a vapour control layer and plasterboard. Takes more space but runs services easily.
- Wood fibre and lime — breathable boards finished in lime plaster, for older walls that need to manage moisture.
Internal wall insulation prices in Newport (Gwent)
| 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.
From enquiry to finished wall
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 Newport (Gwent): questions
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.
Can I stay in the house?
Yes, but each room is out of use while it's worked on, typically 3–5 days.
Do you cover Newport (Gwent)?
Yes — we survey and quote internal wall insulation in Newport (Gwent, NP20) and nearby Risca, Cwmbran and Pontypool, with a fixed written price before any work starts.