How roofinsulation.ie works
What happens to your plan, and where the figures come from.
Free and no obligation. Your plan goes to one contractor, not a list.
How it works
roofinsulation.ie explains where insulation should go in each kind of roof, prices each method, and passes each plan sent to it to a single vetted insulation contractor in the visitor's county. That contractor surveys the roof, prices the work in writing and, if you go ahead, does it under an agreement between you and them. You never pay us.
What happens to your plan
It goes to one contractor only, who works in your county. There's no list and no ring-round.
Where the prices come from
Attic floor prices use what SEAI-registered contractors were paid for each kind of home in 2026 and what an Irish installer charges. Rafter, room-in-roof and flat roof prices are per m² installed rates. Treat them as a figure to plan with: the real price comes after a survey.
The figures on county pages
Roof U-values and roof areas are from SEAI's public BER file, for houses built before 2011. Degree days are our sums from Met Éireann's 1991 to 2020 temperatures, and year built is from Census 2022. The drawings are our own.
Mistakes and contact
If you find a mistake, email hello@roofinsulation.ie. Questions about your data go to privacy@roofinsulation.ie.
Plan your roof insulation
A few quick taps, and your plan fills in as you answer: the right method for your roof, what it costs, the grant and the standard to ask for. Contact details come last, and only if you want a contractor to price it.
Attic floor insulation, semi-d or end of terrace: €1,800 to €2,101 before the €1,500 SEAI grant, so about €300 to €601 to pay.
How the estimate is worked out
Attic floor insulation uses what SEAI-registered contractors were paid for each kind of home in 2026 and what an Irish installer charges, with the SEAI grant taken off. A room in the roof and a flat roof are priced per m² of the area you enter: rafter boards with a plasterboard finish, or a warm roof with a new membrane. VAT is included. Use it to plan with. It isn't a quote: a contractor prices your roof after a survey.
About this site
Who does the work?
A single vetted insulation contractor for your area.
Who sees my details?
Only the one contractor your plan goes to, after you send it.
Every guide and county page
Methods
Costs, grants and rules
Keep the heat under your roof
Pick the roof, what's there now and the home to see the method and the cost. When you want a firm price, your plan goes to a single vetted insulation contractor for your area.