Frequently asked questions
Questions we get a lot
Straight answers for homeowners planning repair or replacement budgets.
- How accurate is this roof cost calculator for Ireland?
- The calculator uses April 2026 contractor rates sourced from roofing companies across Ireland. It applies regional multipliers based on your county and accounts for material, house size and any extras you select. The result is a realistic ballpark range, not a quote. For a fixed price you will need a contractor to inspect the roof in person.
- Does the calculator include VAT?
- Yes. All estimates include VAT at the reduced construction rate of 13.5%. This is the rate that applies to renovation and repair work on existing homes in Ireland. New builds are subject to different VAT rules.
- What is included in the estimate no labours add?
- A full replacement estimate includes stripping the existing roof, new breathable membrane, new battens, your chosen tile or slate, ridge tiles and standard flashings. It also includes skip hire, labour and waste disposal. Scaffolding is shown as a separate line because it varies so much by property.
- How do Dublin and regional prices differ?
- Labour rates in Dublin run 15 to 20 percent above the national average. Material delivery is usually cheaper because suppliers are closer, but that rarely offsets the labour premium. Cork and Limerick sit 5 to 10 percent above average. Galway tracks the national average and rural areas can be 5 to 10 percent below, though remote locations can see travel premiums added.
- Can I get SEAI grants for roof or insulation work?
- You can claim SEAI grants for attic insulation (up to €2,000 for a detached home) and rafter insulation (up to €3,000 through the One Stop Shop scheme) if they are completed by an SEAI-registered contractor. Tile and slate replacement itself does not qualify. Combining a re-roof with an insulation upgrade is the most common way to reduce your net cost.
- How long does a common roof replacement take?
- A standard three-bedroom semi-detached house takes four to seven working days in typical Irish weather conditions. Larger or more complex roofs, or jobs that uncover structural problems once the old roof is stripped, can take longer. Your contractor should give you a timeline when they quote.
- Repair vs full replacement — how do I decide?
- A useful rule of thumb used by contractors: if the cost of repair is more than 25 percent of the cost of a full replacement, and your roof is over 25 to 30 years old, replacement is usually the better investment. If your roof is under 20 years old and the damage is localised to one area, a targeted repair almost always makes more sense.
- Why do extras move the range so much?
- Roofers price based on what it actually costs them to do the job properly. CIF-registered contractors with public liability insurance, workmanship guarantees and proper waste disposal will quote more than someone who skips those things. Getting three quotes helps you see the spread. If one quote is 30 percent below the others, something has been left out.