Rafter insulation in Derry/Londonderry

Where we work around Derry/Londonderry

Nearby, we also cover Limavady.

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

What is rafter insulation?

Because the whole roof slope, the gables and the party walls now have to be insulated, this costs much more than insulating the floor and saves less heat for the money. We check the roof underlay first: a breathable membrane and a felt with no ventilation gap need different build-ups to avoid condensation. More about rafter insulation.

Insulated plasterboard lining where specified
Rigid insulation between the rafters, joints taped
Vapour control layer where the design needs one

Why book with us in Derry/Londonderry

Tidy work

Dust sheets on the route in and every bit of packaging taken away.

Clear contact details

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

We measure before we quote

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

No pressure selling

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

How much does rafter insulation cost in Derry/Londonderry?

£1,645 to £2,595About 30 m² of roof slope. Free survey and a fixed written quote before any work.

Part of this work can be zero-rated as energy-saving materials until 31 March 2027, and part is standard-rated. If VAT applies, your quote shows which is which.

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 rafter insulation in Derry/Londonderry

How soon can you visit a home in Derry/Londonderry?

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.

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.

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.

Is insulating between the rafters better than the loft floor?

Not for saving energy alone. Insulating the floor heats less space and costs far less. Rafter insulation is the right answer when the loft itself needs to be warm.

Can I use the loft as a bedroom after rafter insulation?

Insulation alone does not make a loft habitable. Fire escape, stairs, floor strength and headroom all come into a conversion, which needs building control.