GRP · fibreglass flat roofs · all 26 counties
Fibreglass roofs in Ireland
A fibreglass (GRP) roof costs €75 to €120 a m² installed (BookMyRoofer.ie). On a 30 to 40 m² kitchen extension, RoofQuote.ie publishes €3,800 to €6,500.
Felt that's blistered, a garage roof that leaks, or a balcony you want to walk on? GRP roofing is one hard surface with no seams. 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.
- €75 to €120 a m²GRP fibreglass installed, one Irish roofer's published rate (BookMyRoofer.ie)
- €3,800 to €6,500GRP on a 30 to 40 m² rear kitchen extension (RoofQuote.ie)
- 25+ yearswhat Irish roofing firms publish for a GRP roof's life (Recommended Roofing)
- 13.5% VATon roofing work on a house, not 23% (Revenue)
FreeNo obligationOne company rings you, not fiveNothing agreed until you accept a written price
Cost check
What a GRP roof costs for your size
One tap: roughly how big the roof is. The answer is a published Irish GRP rate times your area.
Published GRP rate × your roof area
€2,250 to €3,600
30 m² at BookMyRoofer.ie's published €75 to €120 a m² for GRP fibreglass, installed (VAT not stated). Our multiplication, not a quote. At RoofQuote.ie's €80 to €120 a m², it's €2,400 to €3,600.
- If the timber deck underneath has rotted, a new deck adds €30 to €50 a m² (Recommended Roofing).
- A warm roof, with new insulation under the GRP, is published at €130 to €190 a m² (RoofQuote.ie).
- Roofing work on 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 GRP fibreglass. RoofQuote.ie's GRP rate is shown next to it. The multiplication is ours. Rates read on 3 November 2026. Measure the roof's length and width if you can: the labels are rough guides. Small roofs cost more a m² because the trims, outlets and the day's set-up cost the same. It's an estimate, never a quote.
What it is
One sheet, no seams, and you can walk on it
A fibreglass roof is laid wet on the roof itself. The roofer coats a new timber deck with resin, rolls glass fibre mat into it, lets it cure hard, then adds a coloured topcoat and pre-formed GRP trims at the edges. There are no seams or laps to open up, and the cured roof takes foot traffic.
Recommended Roofing specifies GRP where the roof has to be walked on: balconies, roof terraces, bay window tops and dormers. It suits small, detailed roofs well because the corners and upstands are made in the same material as the roof. How a GRP roof is laid goes layer by layer.
Compared
GRP, EPDM or felt?
| Material | Installed a m² | Lasts, years |
|---|---|---|
| GRP fibreglass | €75 to €120 | 25 to 35 |
| EPDM rubber | €70 to €110 | 25 to 40 |
| Torch-on felt | €55 to €85 | 15 to 25 |
Rates and lifespans from BookMyRoofer.ie, VAT not stated. GRP vs EPDM vs felt sets three sources side by side.
See it first
A GRP roof on your own photo
Take a photo of the flat roof, from an upstairs window if you can, pick the topcoat colour and finish, and see it done 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.
Irish flat roofs
Flat roofs in numbers
Most Irish flat roofs aren't the main roof. They're on kitchen extensions, garages, porches, bays and dormers, and many of the older ones are felt. When one is replaced, it's the time to decide on GRP, fix the fall so water runs to the outlet, and add insulation if the room below is heated.
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: deck, mat weight, topcoat, trims, outlets, insulation and VAT.
- The workOne to three days on most house roofs, in dry weather. Nothing is agreed until you accept.
Counties
GRP roofing county by county
| County | GRP roof, RoofQuote.ie band | Rain a year, main town | Flat main roof (BER) | Built before 1981 |
|---|---|---|---|---|
| Carlow | €3,800 to €8,000+ | 906 mm | 1.4% | 38% |
| Cavan | €3,800 to €8,000+ | 1,042 mm | 0.8% | 35% |
| Clare | €3,800 to €8,000+ | 1,288 mm | 1.2% | 40% |
| Cork | €4,000 to €8,500+ | 1,109 mm | 2.5% | 44% |
| Donegal | €3,800 to €8,000+ | 1,320 mm | 1.0% | 33% |
| Dublin | €4,500 to €9,500+ | 753 mm | 3.0% | 49% |
| Galway | €4,000 to €8,500+ | 1,289 mm | 1.2% | 33% |
| Kerry | €3,800 to €8,000+ | 1,357 mm | 1.8% | 40% |
| Kildare | €4,200 to €9,000+ | 871 mm | 1.0% | 29% |
| Kilkenny | €3,800 to €8,000+ | 876 mm | 1.4% | 41% |
| Laois | €3,800 to €8,000+ | 938 mm | 1.2% | 33% |
| Leitrim | €3,800 to €8,000+ | 1,127 mm | 1.2% | 37% |
| Limerick | €4,000 to €8,500+ | 1,044 mm | 1.6% | 44% |
| Longford | €3,800 to €8,000+ | 1,019 mm | 0.9% | 37% |
| Louth | €4,200 to €9,000+ | 831 mm | 2.3% | 42% |
| Mayo | €3,800 to €8,000+ | 1,458 mm | 2.3% | 39% |
| Meath | €4,200 to €9,000+ | 869 mm | 1.3% | 31% |
| Monaghan | €3,800 to €8,000+ | 989 mm | 0.9% | 43% |
| Offaly | €3,800 to €8,000+ | 900 mm | 1.3% | 42% |
| Roscommon | €3,800 to €8,000+ | 1,098 mm | 1.2% | 39% |
| Sligo | €3,800 to €8,000+ | 1,253 mm | 1.4% | 39% |
| Tipperary | €3,800 to €8,000+ | 1,032 mm | 1.6% | 47% |
| Waterford | €3,800 to €8,000+ | 1,020 mm | 2.2% | 42% |
| Westmeath | €3,800 to €8,000+ | 933 mm | 1.5% | 39% |
| Wexford | €3,800 to €8,000+ | 1,021 mm | 2.7% | 35% |
| Wicklow | €4,200 to €9,000+ | 896 mm | 2.7% | 42% |
GRP roof: RoofQuote.ie's regional band for a GRP or warm flat roof, VAT not stated. 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. Flat main roof: the share of houses built before 2011 on the BER register whose main roof is flat (SEAI BER register). Built before 1981: the share of all homes with a known year (CSO Census 2022). Our sums.
Free quote
Get a GRP roof 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 a fibreglass roof cost in Ireland?
RoofQuote.ie publishes €3,500 to €6,500 for a fibreglass GRP flat roof and €3,800 to €6,500 for one on a 30 to 40 m² kitchen extension. Recommended Roofing publishes €2,800 to €6,000 incl. VAT for GRP on an extension, garage or balcony (Recommended Roofing). The cost guide has every figure.
What does GRP roofing cost a square metre?
Installed, BookMyRoofer.ie gives €75 to €120 a m² and RoofQuote.ie €80 to €120. Recommended Roofing's calculator gives €90 to €140 a m² for EPDM or GRP.
Is GRP the same as fibreglass?
Yes. GRP is glass-reinforced polyester: glass fibre mat set in polyester resin and finished with a coloured topcoat. Roofers use both names for the same roof.
How long does a fibreglass roof last?
Recommended Roofing publishes 25+ years, BookMyRoofer.ie 25 to 35 years and RoofQuote.ie 25 years or more when installed correctly. See how long it lasts.
Can GRP go over my old felt roof?
Sometimes, if the deck underneath is dry and sound. Recommended Roofing publishes €1,800 to €5,000 incl. VAT for an overlay (Recommended Roofing). See GRP over an existing roof.
Are you a roofing company?
No. Fibreglass Roofing 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.
Where these numbers come from (5 public sources, checked 3 November 2026)
Sources (4)
Prices and facts on this page were checked against these published pages. We are not connected to these businesses.
- BookMyRoofer.ie: bookmyroofer.ie
- RoofQuote.ie: roofquote.ie
- Recommended Roofing: recommendedroofing.ie
- Recommended Roofing: recommendedroofing.ie