Loft InsulationInstallers

Rafter insulation in Portstewart

Portstewart is part of the area we cover in County Londonderry. For rafter insulation, you get a free survey and a fixed written quote.

We cover postcodes including BT55 and BT56, inside the Causeway Coast and Glens council area.

Guide price £1,645 to £2,595 Portstewart, County Londonderry
Insulation boards fitted between roof rafters

Where we work around Portstewart

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

Other towns close by include Coleraine and Limavady.

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

  • Build-up designed for your type of roof underlay
  • Rigid insulation between the rafters, joints taped
  • Vapour control layer where the design needs one

Why book with us in Portstewart

Photos of the finished loft

You see the work done without climbing the ladder.

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.

How much does rafter insulation cost in Portstewart?

£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 Portstewart

Do you charge extra to travel to Portstewart?

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

Do you cover all of BT55?

Yes, we cover the BT55 postcode district and the districts around Portstewart.

Can you visit Portstewart outside working hours?

Ask about early, late or weekend appointments when you get in touch, and we will tell you honestly what we can offer.

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.

Rafter 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.