Loft InsulationInstallers

Loft insulation in Portstewart

We fit loft insulation for homes in Portstewart and across County Londonderry, starting with a free survey and a fixed written quote.

That includes addresses in BT55 and BT56, which fall under Causeway Coast and Glens council.

Guide price £495 to £745 Portstewart, County Londonderry
Mineral wool loft insulation laid across the joists

Where we work around Portstewart

Portstewart sits about 27 miles from Derry/Londonderry, measured in a straight line.

We also cover Coleraine and Limavady.

Postcode districtsBT55, BT56
Council areaCauseway Coast and Glens
County or areaCounty Londonderry

What is loft insulation?

We lay the first layer to the depth of the joists, usually 100 mm, so it fills each bay edge to edge with no gaps. The finished depth sits at 270 mm or more, the depth the Energy Saving Trust recommends. More about loft insulation.

  • Eaves kept clear, with ventilation trays where air could be blocked
  • Waste packaging removed
  • Mineral wool to 270 to 300 mm across the whole loft floor

Why book with us in Portstewart

No pressure selling

You get everything in writing and decide in your own time.

Eaves kept clear

Insulation is held back from the eaves so the loft can still ventilate.

Photos of the finished loft

You see the work done without climbing the ladder.

Tank and pipes protected

Every insulation job includes a tank jacket and pipe lagging, so nothing freezes in a colder loft.

How much does loft insulation cost in Portstewart?

£495 to £745Terraced house, average loft, from bare joists. Free survey and a fixed written quote before any work.

Installing insulation in a home is zero-rated for VAT until 31 March 2027 and 5% after that, under HMRC's rules for energy-saving materials (notice 708/6).

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 insulation in Portstewart

How soon can you visit a home in Portstewart?

We call you back to agree a time that suits you, and confirm the date in writing. Availability changes week to week, so we will give you the earliest slot we have.

Is loft work in Portstewart different from anywhere else?

The method is the same, but older terraces, cottages and newer estates each have their own quirks: lath ceilings, low pitches or trussed roofs. We plan for the loft we find.

How do I pay for work in Portstewart?

Payment terms are set out on your quote. We never ask for payment on the doorstep or in cash.

Do I need to empty my loft first?

The floor needs to be clear for the insulation to go down. If moving things yourself is difficult, tell us at the survey and we can price clearing and putting items back on raised boarding.

Does loft insulation need building control approval?

On its own it usually does not, but the work still has to meet the energy standard. The rules differ across England, Wales, Scotland and Northern Ireland, so we confirm the position for your address on the quote.

Loft insulation in other towns

Other loft work in Portstewart

Find out what your loft needs

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