Repairs
Fibreglass Roof Repair
A GRP roof repair, a crack, a trim or an outlet, costs €250 to €900. A crack in GRP is ground out and re-laminated on a dry day.
For one fault on a GRP roof that's otherwise sound.
Free, no obligation. One local company prices it, not five.
What goes wrong on GRP
- Hairline cracks at the trims: ground back, re-laminated and topcoated.
- A crack over a deck joint: the board underneath moved; cut out, re-supported and re-laminated.
- A leaking outlet: re-formed or replaced, laminated in.
- Where the roof meets the wall: the upstand or flashing re-done.
- A worn topcoat: cleaned, keyed and recoated.
When it's a new roof
- Cracks across the roof, not just at the edges.
- A soft or springy deck: wet boards under the laminate.
- The laminate lifting off the deck.
- The same crack back after a repair.
Then the price is a new GRP roof: see the cost guide.
What a repair costs
| Job | Typical cost | What moves the price |
|---|---|---|
| Repair: a crack, a trim, an outlet | €250 to €900 | Finding it; a dry day to re-laminate |
| GRP over the old roof | €1,800 to €5,000 | Only over a dry, sound deck |
| A GRP flat roof, garage or extension | €2,800 to €6,500 | Size, a new deck, trims on every edge, the outlet |
GRP jobs we cover
New GRP roofsStrip the old roof and lay GRP. €75 to €140 a m².More on new grp roofs →
GRP over an existing roofOnly over a dry, sound deck. €1,800 to €5,000.More on grp over an existing roof →
Garage roofsThe commonest roof to go over to GRP. €1,800 to €5,200.More on garage roofs →
Extension roofsWith insulation over a heated room. €3,800 to €6,500 for 30 to 40 m².More on extension roofs →
Dormers and balconiesSmall roofs with lots of edges, and roofs you stand on.More on dormers and balconies →Fibreglass roofing in every county
- Carlow1.4% flat main roofs
- Cavan0.8% flat main roofs
- Clare1.2% flat main roofs
- Cork2.5% flat main roofs
- Donegal1.0% flat main roofs
- Dublin3.0% flat main roofs
- Galway1.2% flat main roofs
- Kerry1.8% flat main roofs
- Kildare1.0% flat main roofs
- Kilkenny1.4% flat main roofs
- Laois1.2% flat main roofs
- Leitrim1.2% flat main roofs
- Limerick1.6% flat main roofs
- Longford0.9% flat main roofs
- Louth2.3% flat main roofs
- Mayo2.3% flat main roofs
- Meath1.3% flat main roofs
- Monaghan0.9% flat main roofs
- Offaly1.3% flat main roofs
- Roscommon1.2% flat main roofs
- Sligo1.4% flat main roofs
- Tipperary1.6% flat main roofs
- Waterford2.2% flat main roofs
- Westmeath1.5% flat main roofs
- Wexford2.7% flat main roofs
- Wicklow2.7% flat main roofs
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.
Questions people ask
Can a cracked fibreglass roof be repaired?
A crack at a trim or over one joint, yes: ground out and re-laminated on a dry day. Cracking all over usually means a new roof.
Can GRP be repaired in the rain?
No. A temporary cover, yes; the repair waits for a dry spell.
Will a repair match the colour?
The topcoat can be matched closely; an older roof may look patchy until it weathers. A full recoat evens it out.
Get a free price for a GRP roof
One local flat roofing company, a look at the roof, a written price. Free, no obligation.