Internal wall insulation · Northern Ireland
Internal wall insulation in County Antrim
Get guide prices online, then a free survey and fixed quote for internal wall insulation in County Antrim, including Lisburn and Newtownabbey. We plan internal insulation in County Antrim homes room by room so you keep the rest of the house usable.
- Free survey and fixed written price
- Guide price from £75 per m² 0% VAT
- Planning and building control checked for Northern Ireland
Free survey in County Antrim
Tell us the postcode and what you need.
What's included
- Can be done one room at a time during a renovation
- Insulated plasterboard, stud wall or breathable systems
- Keeps the outside of the house exactly as it is
- Sockets, radiators, skirting and coving are moved and refitted
- Loses roughly 50–100mm per insulated wall
County Antrim: walls, weather and approvals
Northern Ireland has many rendered and pebble-dashed homes, older solid-walled rural houses, and estates built by the Housing Executive.
Parts of County Antrim 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.
Where a property in County Antrim is in a conservation area or the front elevation must stay unchanged, internal insulation is often the practical route.
- Nation
- Northern Ireland
- Region
- Northern Ireland
- Towns covered
- Belfast, Lisburn, Newtownabbey, Carrickfergus, Ballymena, Antrim, Larne
- Guide price
- From £75 per m² 0% VAT
Approvals in Northern Ireland
Internal insulation rarely needs planning permission, but listed buildings need listed building consent for internal changes that affect their character.
Insulating external walls is building work under the Building Regulations (Northern Ireland) 2012, handled by council building control, with Technical Booklet F1 covering conservation of fuel and power in dwellings.
What are the risks with internal insulation?
Insulating inside makes the masonry colder, so moisture risk rises. Weak points are where floor joists bear into the wall, window reveals and corners. A condensation risk check for the build-up, a continuous vapour control layer where specified, and returning insulation into reveals deal with most of it.
Internal wall insulation prices in County Antrim
| 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
Tell us about the property
Use the quote tool or form, or call. Photos help.
Free survey
We measure, check the walls and confirm approvals.
Fixed written quote
System, details, access, exclusions and VAT in writing.
Installation
Scheduled for suitable weather, with a clear programme.
Internal wall insulation in County Antrim: 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 all of County Antrim?
Yes. We survey and quote internal wall insulation across County Antrim, including Belfast, Lisburn, Newtownabbey, Carrickfergus, Ballymena.
Do I need planning permission in Northern Ireland?
In Northern Ireland, permitted development is set by the Planning (General Permitted Development) Order (NI) 2015. We check your address before quoting.