Felt remains one of the most common flat roof materials in Ireland because it is cost-effective and widely available. This guide explains felt roof cost per m2 in Ireland for 2026, including torch-on vs cold-applied systems, lifespan, and total costs by roof size.
Table of Contents
- Quick answer: average felt roof costs
- Cost per m2 by felt system
- Total cost by roof size
- Repair vs re-felt
- Flat roof specific factors
- Regional pricing
- How to extend felt roof lifespan
- FAQs
Quick Answer: Average Felt Roof Costs
Most Irish homeowners pay EUR 55 to EUR 85 per m2 for a standard torch-on felt system installed. Cold-applied felt is usually cheaper but shorter-lived.
For full replacement pricing, use the Roof Felt Calculator.
Cost Per m2 by Felt System
| Felt System | Typical Cost per m2 | Lifespan | Best For |
|---|---|---|---|
| Torch-on felt (3-layer) | EUR 55-85 | 15-25 years | Most domestic flat roofs |
| Torch-on felt (2-layer) | EUR 45-70 | 12-20 years | Budget repairs |
| Cold-applied felt | EUR 35-60 | 8-15 years | Small sheds or garages |
| Mineral finish felt | EUR 55-95 | 15-25 years | Better UV resistance |
Total Cost by Roof Size
| Roof Size | Typical Total Cost |
|---|---|
| 10-15 m2 (shed/porch) | EUR 650-1,200 |
| 20-30 m2 (garage) | EUR 1,200-2,400 |
| 35-50 m2 (extension) | EUR 2,000-4,200 |
| 60-80 m2 (large extension) | EUR 3,200-6,500 |
Repair vs Re-Felt
Repair makes sense when:
- there is one leak or a small damaged area
- the deck is solid and dry
- the felt is under 10 years old
Re-felt is better when:
- multiple leaks or blistering
- felt has cracked or lifted at edges
- the roof is close to end-of-life
If you are unsure, book a Roof Inspection first.
Flat Roof Specific Factors
- Drainage and slope: Poor drainage causes pooling and early failure.
- Deck condition: Rotten timber must be replaced before felting.
- Upstands and edges: Parapets and drip edges add labour.
- Weather: Torch-on felt needs dry conditions to bond properly.
Regional Pricing
| Region | Typical Cost per m2 |
|---|---|
| Dublin | EUR 60-90 |
| Cork | EUR 55-85 |
| Galway | EUR 52-82 |
| Rest of Ireland | EUR 50-80 |
How to Extend Felt Roof Lifespan
- Keep gutters and outlets clear to prevent pooling.
- Inspect for lifted edges after storms.
- Avoid foot traffic unless protected.
- Reseal joints every few years on older roofs.
Related Services and Tools
External reference: NSAI Building Standards
FAQs
How long does felt roofing last in Ireland?
Torch-on felt typically lasts 15-25 years, while cold-applied felt usually lasts 8-15 years.
Is torch-on felt better than cold-applied felt?
Yes, torch-on systems are thicker, more durable, and better suited to Irish weather.
Can you install felt over old felt?
Sometimes, but overlays often reduce lifespan and hide deck issues. Full replacement is safer for older roofs.
Does felt work for pitched roofs?
Felt is mainly used on flat or low-slope roofs, not pitched slate or tile roofs.
What time of year is best for felt roofing?
Spring and summer are best, but experienced contractors can work year-round if weather allows.
Get a Free Felt Roof Quote
Want accurate pricing for your roof? Request a free quote or call +353 89 981 9675.
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