Loft insulation top-up in Derry/Londonderry

Where we work around Derry/Londonderry

We work in neighbouring Limavady too.

Postcode districts	BT48
Council area	Derry City and Strabane
County or area	County Londonderry

What is a loft insulation top-up?

Before we quote we measure the existing layer in several places and check its condition. If it is wet, dirty, matted or full of droppings, laying fresh wool on top just buries the problem, so we say so and price removal instead. More about a loft insulation top-up.

Eaves ventilation kept clear
Gaps in the existing layer filled
Tank jacket and pipe lagging in the loft

Why book with us in Derry/Londonderry

We measure before we quote

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

Plain-English advice

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

Downlights made safe

Fire-rated covers or a clear zone around recessed lights.

Tank and pipes protected

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

How much does a loft insulation top-up cost in Derry/Londonderry?

£395 to £545Terraced house, average loft, topping up from about 100 mm. 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 a loft insulation top-up in Derry/Londonderry

Will I get a written quote for work in Derry/Londonderry?

Yes. Every quote is in writing with the work, the price and what is included, so you can compare it properly.

What do I need to do before you arrive in Derry/Londonderry?

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 charge extra to travel to Derry/Londonderry?

Not normally. Our guide prices include normal travel to Derry/Londonderry. If an address needs a ferry or an unusually long journey, we tell you the cost before you book.

Can new insulation go on top of old insulation?

Yes, if the old layer is dry, clean and reasonably even. If it is damp, contaminated or badly compressed we recommend removing it first.

Which way should the top-up layer run?

Across the joists, at right angles to the first layer. That covers the tops of the joists, which otherwise let heat escape along the timber.