Loft InsulationInstallers

Room-in-roof insulation in Lisburn

Homes in Lisburn get the same service as everywhere else we work in County Antrim. For room-in-roof insulation, that means a free survey and a fixed written quote.

Jobs in BT27, BT28 and BT17 are all within our normal area, in the Lisburn and Castlereagh council area.

Guide price £3,995 to £8,995 Lisburn, County Antrim
An attic room being insulated

Where we work around Lisburn

Lisburn sits about 7 miles from Belfast, measured in a straight line.

Other towns close by include Belfast and Newtownabbey.

Postcode districtsBT27, BT28, BT17, BT10
Council areaLisburn and Castlereagh
County or areaCounty Antrim

What is room-in-roof insulation?

Most rooms-in-roof are reached by stripping the existing plasterboard on the slopes, fitting insulation between and over the rafters, and re-boarding. Dormer cheeks and roofs are included where they can be reached. More about room-in-roof insulation.

  • Eaves voids insulated where accessible
  • Boarding and finishing as agreed on the quote
  • Insulation to slopes, knee walls and flat ceiling

Why book with us in Lisburn

Clear contact details

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

Tidy work

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

We measure before we quote

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

Photos of the finished loft

You see the work done without climbing the ladder.

How much does room-in-roof insulation cost in Lisburn?

£3,995 to £8,995One room-in-roof, depending on size and finish. 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 room-in-roof insulation in Lisburn

Do you take on jobs outside Lisburn?

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

How do I pay for work in Lisburn?

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

Can a landlord in Lisburn book work for a tenanted house?

Yes. We can arrange access with the tenant directly and send you photos once the work is finished.

How long does room-in-roof insulation take?

Usually three to six working days for one room, depending on how much is stripped and how it is finished.

Will the room get smaller?

Slightly. Insulated plasterboard over the rafters takes a few centimetres off each slope.

Room-in-roof insulation in other towns

Other loft work in Lisburn

Find out what your loft needs

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