Solid wall insulation · Northern Ireland
Solid wall insulation in County Antrim
Planning solid wall insulation anywhere in County Antrim? We cover towns including Belfast and Lisburn, and check planning and building control for each address. For solid-walled homes in County Antrim, we check wall thickness and age first to confirm there's no cavity to fill.
- Free survey and fixed written price
- Guide price from £75 per m² + scaffold, 0% VAT
- Planning and building control checked for Northern Ireland
Free survey in County Antrim
Tell us the postcode and what you need.
Part of every quote
- External insulation keeps room sizes and treats cold bridges well
- Breathable options for stone and lime-mortared walls
- Both can be done in stages, elevation by elevation or room by room
- Solid walls can lose heat roughly twice as fast as an insulated cavity wall
- Internal insulation suits single rooms or where the outside can't change
Before we quote in County Antrim
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.
On solid-walled houses in County Antrim, the gable or the most weather-exposed wall is often the place to start.
- Nation
- Northern Ireland
- Region
- Northern Ireland
- Towns covered
- Belfast, Lisburn, Newtownabbey, Carrickfergus, Ballymena, Antrim, Larne
- Guide price
- From £75 per m² + scaffold · 0% VAT
Northern Ireland: planning and regulations
In Northern Ireland, permitted development is set by the Planning (General Permitted Development) Order (NI) 2015. Changing the external appearance of a house may need permission, and conservation areas, flats, commercial buildings and listed buildings need planning permission or listed building consent. Check with your council's planning office.
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.
How can I tell if my walls are solid?
Measure the wall thickness at a window or door: about 225mm (9 inches) of brick usually means solid, while 260mm or more often means a cavity. On exposed brick, a pattern with bricks laid end-on (headers) every few courses points to solid construction. Stone walls are usually solid regardless of thickness. Age is a strong clue too — most homes built before the 1920s are solid-walled.
Solid wall insulation prices in County Antrim
| 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.
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.
Solid wall insulation in County Antrim: questions
Is solid wall insulation worth it?
For many solid-walled homes it's one of the biggest single improvements to comfort, because the walls are often the largest heat-loss area. Savings depend on the home and heating, so we don't promise a figure.
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.
Do you cover all of County Antrim?
Yes. We survey and quote solid 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.