Cavity wall insulation for Carrickfergus properties
Carrickfergus sits in County Antrim, about 9 miles north-east of Belfast. We work across the BT38 district, including nearby Newtownabbey, Larne and Belfast.
Most Carrickfergus houses built from the 1920s onwards have cavity walls, but the survey still checks each one: cavity width, debris, the condition of the brickwork and how exposed each wall is. If a wall in Carrickfergus is not suitable, for example because of an undiagnosed damp patch or a very exposed gable, you are told so in writing with the reason.
Local weather affects which walls can be filled. Parts of County Antrim face some of the heaviest wind-driven rain in the UK, especially exposed coastal and upland sites. Here the survey is stricter: some walls suit only certain certified systems, and some should not be filled at all.
On the rules side, in Carrickfergus inserting cavity wall insulation needs a building control application to the council before work starts.
Funding in Northern Ireland
In Northern Ireland, the Affordable Warmth Scheme helps eligible households with a gross income under £23,000.
Sources: NI Housing Executive: Affordable Warmth Scheme; Utility Regulator: NI Sustainable Energy Programme.
Which material goes in?
Usually blown mineral wool or bonded polystyrene beads, both third-party certified for cavity fill. The survey picks the system that suits your cavity width, wall condition and exposure zone, not whichever is cheapest on the day. Old-style urea-formaldehyde foam is not used.
What is included in Carrickfergus
- Borescope check where the cavity is in doubt
- Building regulations route for your nation, confirmed in writing
- Certified mineral wool or bonded bead system
- Drilling, filling and colour-matched making good
Guide prices for Carrickfergus
| Cavity wall insulation guide prices | Guide price |
|---|---|
| Detached house | £2,295–£3,795 |
| Semi-detached house | £1,495–£2,495 |
| End-terrace house | £1,295–£2,195 |
| Detached bungalow | £1,295–£2,195 |
| Semi-detached bungalow | £895–£1,595 |
| Mid-terrace house | £795–£1,395 |
No VAT is charged on installing insulation in homes until 31 March 2027 (then 5%). Guide ranges only: the fixed price is confirmed in writing before any work starts, and anything that could not be seen at survey is agreed with you first.
What happens next for a Carrickfergus property:
Tell us about the property
Postcode, property type and what you need.
Free survey
Walls, cavity, condition and exposure checked and photographed.
Written result and price
Suitable, suitable after repairs, or not suitable, with a fixed price.
Work and paperwork
Installation, making good, and the regulations and guarantee paperwork.