Loft InsulationInstallers

Loft ventilation in Belfast

We fit loft ventilation for homes in Belfast and across County Antrim, starting with a free survey and a fixed written quote.

That includes addresses in BT1, BT2 and BT7. The local authority is Belfast City.

Guide price £245 to £695 Belfast, County Antrim
Eaves ventilation trays in a loft

Where we work around Belfast

Other towns close by include Newtownabbey, Lisburn, Carrickfergus and Antrim.

Postcode districtsBT1, BT2, BT7, BT12
Council areaBelfast City
County or areaCounty Antrim

What is loft ventilation?

Most pitched roofs are ventilated at the eaves, sometimes with high-level vents as well. Where there are no vents, we add soffit vents, tile or slate vents, or ridge vents, depending on the roof covering and the underlay. More about loft ventilation.

  • Soffit, tile or ridge vents as specified
  • A note of air leaks from the house that need sealing
  • Eaves trays where insulation could block airflow

Why book with us in Belfast

We measure before we quote

Existing depth, joist spacing, wiring and the tank are checked, not guessed.

Fixed written price

The price on the quote is the price you pay. It only changes if you change the job, or if we find something hidden, such as rot, and you agree the change in writing first.

Plain-English advice

We explain what we find in plain English, and say so when nothing needs doing.

Clear contact details

Your quote says who to call with questions before, during and after the work.

How much does loft ventilation cost in Belfast?

£245 to £695Eaves or tile vents for a typical house. Free survey and a fixed written quote before any work.

This work is not an energy-saving material for VAT, so it is standard-rated if VAT applies. Where it is done alongside insulation, the quote shows each part separately.

Work out a guide price for your loft

Building regulations in Northern Ireland

Northern Ireland has its own Building Regulations, with energy guidance in Technical Booklet F1. Upgrading loft insulation may count as a thermal alteration, so check with your council's building control. How the rules work across the UK.

Questions about loft ventilation in Belfast

What do I need to do before you arrive in Belfast?

Clear a path to the hatch and, if you can, move stored items away from the area we will be working in. Tell us about anything heavy or fragile.

Do you take on jobs outside Belfast?

Yes. We also work in Newtownabbey and Lisburn and elsewhere in County Antrim.

Do you cover all of BT1?

Yes, we cover the BT1 postcode district and the districts around Belfast.

My bathroom fan vents into the loft. Is that a problem?

Yes. It pumps warm, wet air straight into the coldest part of the house. The duct should run to outside through a vent tile, soffit or wall.

Will extra vents make my house colder?

No. The vents ventilate the loft above the insulation, not the rooms below.

Loft ventilation in other towns

Other loft work in Belfast

Find out what your loft needs

Free survey and a fixed written quote for installation work. Guide prices first if you prefer.