Flat roofs · EPDM · GRP · felt · Ireland
Flat roof replacement in Ireland
Replacing the flat roof on a typical 25 to 40 m² extension costs €3,000 to €6,000 (BookMyRoofer.ie). Installed, felt runs €55 to €85 a m², EPDM rubber €70 to €110 and GRP fibreglass €75 to €120.
Leaking at the wall, blistered felt, a soft spot underfoot, or water that sits for days? Send it in 4 taps and it goes to one flat roofing company that covers your county, who rings you back with a time to look and a written price.
- €3,000 to €6,000a 25 to 40 m² extension roof, one Irish roofer's published range (BookMyRoofer.ie)
- 1 to 3 daysfor most house flat roofs, weather allowing (BookMyRoofer.ie)
- 7,273planning permissions for house extensions in the year to June 2026 (CSO)
- 31 pricesfrom 3 Irish roofing sources, read 2 November 2026: the cost guide
FreeNo obligationOne company rings you, not fiveNothing agreed until you accept a written price
Cost check
What a new flat roof costs for your size
Two taps: the material and roughly how big the roof is. The answer is a published Irish rate times your area.
Published rate × your area
€2,100 to €3,300
30 m² at BookMyRoofer.ie's published €70 to €110 a m² for epdm rubber, installed (VAT not stated). Our multiplication, not a quote. At RoofQuote.ie's €70 to €105 a m², it's €2,100 to €3,150.
- If the timber deck underneath has rotted, a new deck adds €30 to €50 a m², ex VAT (Recommended Roofing).
- A warm roof, with new insulation, is published at €130 to €190 a m² (RoofQuote.ie).
- Repair and maintenance of a house is at the 13.5% VAT rate (Revenue). Ask whether the written price includes it.
How this is worked out
The area you pick, times BookMyRoofer.ie's published installed rate a m² for that material. RoofQuote.ie's rates are shown next to it. The multiplication is ours. Rates read on 2 November 2026. Measure the roof's length and width from inside if you can: the area labels are rough guides. Small roofs cost more a m² because access, trims and the day's set-up cost the same. It's an estimate, never a quote.
When to replace
Signs the flat roof has had it
- Leaks in more than one place, or the same leak back after a patch.
- Soft or springy spots when it's walked on: the deck underneath is wet or rotten.
- Felt that's cracked, blistered or crazed all over, not just in one patch.
- Water that sits long after the rain has stopped: see falls and ponding.
- Stains on the ceiling below that grow after heavy rain.
One fault in one place is usually a repair. Several, or a soft deck, is a replacement. Repair or replace sets out how to tell.
Materials
Four ways to cover a flat roof
| Material | Installed a m² | What it is |
|---|---|---|
| EPDM rubber | €70 to €110 | A synthetic rubber sheet, usually one piece on a house roof |
| GRP fibreglass | €75 to €120 | Glass mat and resin laid wet, cured hard, with a topcoat |
| Torch-on felt | €55 to €85 | Layers of modified bitumen sheet, bonded with a torch |
| Single-ply PVC or TPO | €80 to €130 | A thin plastic membrane with heat-welded seams |
Rates from BookMyRoofer.ie, VAT not stated. EPDM vs GRP vs felt puts the prices and lifespans side by side.
See it first
A new flat roof on your own photo
Take a photo of the flat roof, from an upstairs window if you can, pick EPDM, GRP or felt, and see it finished before anyone quotes. Free, in under a minute.
- Upload a photo, or answer 4 questions.
- We pass it to one company that covers your county.
- They ring you with a written price.
Preview of your photo, not a guarantee. Your photo goes to Google's Gemini service to make the picture and isn't kept.
A photo that works
- Daylight, on a dry day.
- The whole roof in the shot, with its edges and the wall it meets.
- From an upstairs window, or from a ladder held by someone else.
- Never stand on a flat roof you think is soft or leaking.
Extensions
Most flat roofs are on extensions
Kitchen extensions, garages, porches, bays and dormers: that's where most Irish flat roofs are. The oldest are felt, and many are on their second or third covering. When one is replaced, it's the time to add insulation (a warm roof), fix the fall, and decide about a rooflight.
How it works
From the form to a new roof
- Answer 4 questions or upload a photoThe job, the roof, the size and the county. Only your number is needed.
- We pass it to one companyOne flat roofing company that covers your county. Not a list, and not five companies ringing you.
- They ring you with a priceAfter a look at the roof, in writing: material, deck, insulation, trims, outlets and VAT.
- The workOne to three days on most house roofs, weather allowing. Nothing is agreed until you accept.
Counties
Flat roofs county by county
| County | Rain a year, main town | Dec to Feb | Houses | Built 1961–80 | Built before 1981 |
|---|---|---|---|---|---|
| Dublin | 753 mm | 185 mm | 378,215 | 23% | 49% |
| Cork | 1,109 mm | 328 mm | 190,254 | 19% | 44% |
| Galway | 1,289 mm | 379 mm | 87,340 | 17% | 33% |
| Limerick | 1,044 mm | 307 mm | 67,442 | 20% | 44% |
| Kildare | 871 mm | 223 mm | 74,504 | 18% | 29% |
| Meath | 869 mm | 226 mm | 66,965 | 17% | 31% |
| Wicklow | 896 mm | 245 mm | 48,853 | 20% | 42% |
| Louth | 831 mm | 210 mm | 45,783 | 21% | 42% |
| Wexford | 1,021 mm | 284 mm | 56,127 | 15% | 35% |
| Waterford | 1,020 mm | 275 mm | 43,615 | 19% | 42% |
Rain: Met Éireann's 1991–2020 average on a 1 km grid, our mean of the cells within 3 km of the county's largest town. Houses: private households in a detached, semi-detached or terraced house; the building periods are shares of all homes with a known year (CSO Census 2022). Our sums.
Free quote
Get a price in 4 taps
Tap what you need and leave your number. It goes to one flat roofing company that covers your county, and they ring you back to arrange a look and a written price.
FAQ
Questions people ask
How much does flat roof replacement cost in Ireland?
BookMyRoofer.ie publishes €3,000 to €6,000 for a 25 to 40 m² extension roof and €1,800 to €3,500 for a 15 to 20 m² garage. Recommended Roofing publishes €1,500 to €4,000 for torch-on felt up to 20 m² and €2,500 to €5,500 for EPDM on an extension up to 20 m², incl. VAT (Recommended Roofing). The cost guide has every figure.
What is the cost a square metre?
Installed, BookMyRoofer.ie gives €55 to €85 for torch-on felt, €70 to €110 for EPDM, €75 to €120 for GRP and €80 to €130 for single-ply. Recommended Roofing's calculator gives €90 to €140 a m² for EPDM or GRP, ex VAT.
Which is better, EPDM, GRP or felt?
EPDM is one sheet with no seams on most house roofs. GRP is hard and can be walked on. Felt costs least. See EPDM vs GRP vs felt for prices and lifespans side by side.
How long does it take?
Most residential flat roof replacements take 1 to 3 days, depending on size and weather (BookMyRoofer.ie). See how long it takes.
Are you a roofing company?
No. Flat Roof Replacement is an introduction service run by Bartlomiej Standa, trading as Elevate Ireland. We pass your request to one flat roofing company that covers your county. They look at the roof, price it in writing and deal with you directly.
Do I need planning permission to replace a flat roof?
Not to re-cover an ordinary house roof the same way. Maintenance or improvement that doesn't materially change how the house looks is exempted development under section 4(1)(h) of the Planning and Development Act 2000. Changing to a pitched roof, raising it, or work on a protected structure is a question for the council.
Where these numbers come from (6 public sources, checked 2 November 2026)
Sources (5)
Prices and facts on this page were checked against these published pages. We are not connected to these businesses.
- BookMyRoofer.ie: bookmyroofer.ie
- Bauder: bauder.co.uk
- Recommended Roofing: recommendedroofing.ie
- RoofQuote.ie: roofquote.ie
- Recommended Roofing: recommendedroofing.ie