Room-in-roof insulation in Carrickfergus
We fit room-in-roof insulation for homes in Carrickfergus and across County Antrim, starting with a free survey and a fixed written quote.
Jobs in BT38 are all within our normal area, in the Mid and East Antrim council area.

Where we work around Carrickfergus
Carrickfergus sits about 10 miles from Belfast, measured in a straight line.
Other towns close by include Newtownabbey, Larne and Belfast.
| Postcode districts | BT38 |
|---|---|
| Council area | Mid and East Antrim |
| County or area | County 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. Where there is access behind the knee walls, we insulate the eaves voids and the floor behind them too. More about room-in-roof insulation.
- Eaves voids insulated where accessible
- Insulation to slopes, knee walls and flat ceiling
- Boarding and finishing as agreed on the quote
Why book with us in Carrickfergus
Clear contact details
Your quote says who to call with questions before, during and after the work.
Plain-English advice
We explain what we find in plain English, and say so when nothing needs doing.
Fixed written price
The price on the quote is the price you pay. It only changes if you change the job, or if we find something hidden, such as rot, and you agree the change in writing first.
No pressure selling
You get everything in writing and decide in your own time.
How much does room-in-roof insulation cost in Carrickfergus?
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.
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 Carrickfergus
What do I need to do before you arrive in Carrickfergus?
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.
How soon can you visit a home in Carrickfergus?
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.
Do you charge extra to travel to Carrickfergus?
Not normally. Our guide prices include normal travel to Carrickfergus. If an address needs a ferry or an unusually long journey, we tell you the cost before you book.
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.
Can it be done without removing the plasterboard?
Sometimes the flat ceiling and eaves voids can be reached from behind. The slopes almost always need the boards off to insulate them properly.
Room-in-roof insulation in other towns
Other loft work in Carrickfergus
- Rafter insulation in Carrickfergus From £1,645
- Loft ventilation in Carrickfergus From £245
- Thermal imaging survey in Carrickfergus From £165
- Period home loft insulation in Carrickfergus From £995
- New-build loft insulation in Carrickfergus From £5 per m²
- Loft insulation for flats in Carrickfergus From £495
