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.

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 districts | BT55, BT56 |
|---|---|
| Council area | Causeway Coast and Glens |
| County or area | County 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?
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).
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
- Loft insulation top-up in Portstewart From £395
- Loft boarding in Portstewart From £695
- Insulated loft hatches in Portstewart From £245
- Pipe and tank lagging in Portstewart From £95
- Loft insulation for flats in Portstewart From £495
- Loft insulation survey in Portstewart From £95
- Thermal imaging survey in Portstewart From £165
