Compared
GRP vs EPDM vs Felt
GRP costs €75 to €140 a m², EPDM €70 to €140 a m² and torch-on felt €55 to €90 a m², laid. GRP is hard and walkable, EPDM is one flexible rubber sheet, and felt costs least and wears out first.
Price and life side by side, and which suits which job.
Free, no obligation. One local company prices it, not five.
Price and life
| Membrane | Typical rate, laid | Whole roof and life |
|---|---|---|
| GRP fibreglass | €75 to €140 a m² | Whole roof €2,800 to €6,500; 25 to 35 years |
| EPDM rubber | €70 to €140 a m² | Whole roof €2,500 to €5,800; 20 to 50+ years |
| Torch-on felt | €55 to €90 a m² | Whole roof €1,500 to €5,000; 10 to 25 years |
| Single-ply PVC or TPO | €80 to €130 a m² | 20 to 35 years |
Which roof suits which job
- A balcony, roof terrace or walkway: GRP. It's rigid and takes foot traffic once cured; EPDM can be punctured under a hard point load.
- A small roof with lots of corners: GRP. Upstands and corners are made in the same material.
- A large plain roof: EPDM, often in one sheet with no seams.
- The lowest price: felt, accepting the shorter life.
- Cold weather: EPDM and felt can go down when GRP has to wait for a dry, mild day.
All the flat roof materials side by side: flatroofreplacement.ie.
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 →
GRP roof repairCracks, trims, outlets. €250 to €900.More on grp roof repair →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
Is GRP better than EPDM?
Neither is better everywhere. GRP is the one to walk on and suits detailed small roofs. EPDM is flexible and suits big plain roofs. Both outlast felt.
Which costs least?
Felt: €55 to €90 a m², against €75 to €140 a m² for GRP.
Which lasts longest?
EPDM at its best, 20 to 50+ years, then GRP at 25 to 35. The deck and the details decide more than the material.
Can GRP go over felt?
Over a sound, dry deck, sometimes. See GRP over an existing roof.
Get a free price for a GRP roof
One local flat roofing company, a look at the roof, a written price. Free, no obligation.