Underfloor insulation for Belfast properties
Belfast is among the towns we cover in County Antrim, alongside Newtownabbey, Lisburn and Carrickfergus. Belfast is one of the main towns we cover in County Antrim.
Where a Belfast home also has empty cavity walls, we can survey those at the same time. Small measures like this are often among the cheapest per pound saved, and they suit Belfast homes of every age.
As for paperwork, if cavity wall insulation follows in Belfast, 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.
Keeping the void ventilated
Air bricks under a suspended floor must stay clear so the timbers stay dry. Insulation goes between the joists, not across the void, and gaps at skirtings are sealed to stop draughts.
What is included in Belfast
- Draught sealing at skirtings
- Boards relaid
- Floor void inspection
- Insulation between joists
Guide prices for Belfast
| Underfloor insulation guide prices | Guide price |
|---|---|
| Suspended timber floor, typical room | £795–£1,495 |
| Whole ground floor | £1,995–£3,995 |
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.
How it works in Belfast:
Tell us about the property
Postcode, property type and what you would like done.
Free survey
Access, condition, existing insulation and ventilation checked.
Written result and price
What we recommend and a fixed price before any work.
Work and tidy-up
Fitted at an agreed time, with ventilation kept clear.