Blown mineral wool insulation across County Down
We cover 5 towns in County Down: Bangor, Newtownards, Newry, Downpatrick and Banbridge.
Every elevation is judged on its own exposure. Parts of County Down 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.
A suitable wall in County Down is usually filled in a single day from outside, with drill holes made good to match the pointing. Most County Down 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.
Building control in Northern Ireland
In Northern Ireland, inserting insulation into an existing cavity wall needs a building control application to your council before the work. We make sure the application route is agreed and confirmed in writing before any drilling starts.
Funding in Northern Ireland
- The Affordable Warmth Scheme, run with the NI Housing Executive, helps owner-occupiers and private tenants with a total gross household income under £23,000; cavity wall insulation is a priority measure where suitable.
- The NI Sustainable Energy Programme funds energy efficiency schemes through participating providers.
- ECO4 does not apply in Northern Ireland.
Sources: Building Control NI: frequently asked questions; Belfast City Council: what are the building regulations; NI Housing Executive: Affordable Warmth Scheme; Utility Regulator: NI Sustainable Energy Programme.
When is it not the right choice?
Very narrow or uneven cavities, walls with lots of mortar snots and debris, and some very exposed elevations can be better suited to bonded bead, which flows around obstructions and is certified for a wider range of exposure zones in some systems. The survey says which and why.
What is included
- Certified mineral fibre system
- Density and drill pattern recorded
- Making good to the mortar colour
- Cavity barriers where needed
- Regulations route and guarantee named on the quote
Blown mineral wool insulation prices in County Down
| Blown mineral wool insulation guide prices | Guide price |
|---|---|
| Detached house | £1,895–£3,395 |
| Semi-detached house | £1,295–£2,195 |
| End-terrace house | £1,095–£1,895 |
| Detached bungalow | £1,095–£1,895 |
| Semi-detached bungalow | £795–£1,395 |
| Mid-terrace house | £795–£1,295 |
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.
The steps for blown mineral wool insulation in County Down:
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.