TL;DR
Quick summary for busy readers — key cost takeaways before you compare contractor quotes.
- The five costs most commonly left out of Irish roofing quotes are:
- 1. Scaffolding — €800–€3,500 2. Skip hire and waste disposal — €500–€1,000 3. Rotten timber repairs — €400–€800 per rafter 4. Chimney repointing and flashing — €500–€1,500 5. Insulation upgrade (Part L) — €1,000–€3,000
- Budget an extra 15–20% on top of any headline quote to cover these.
Why Do Roof Quotes Leave Things Out?
There are two reasons.
The first is legitimate: some extras genuinely cannot be priced until the job starts. Rotten timber is hidden under tiles until the strip happens. A contractor cannot give you a fixed price for something they cannot yet see.
The second is less legitimate: some contractors quote low to win the job and add costs once work has started.
Knowing which extras are predictable and which are genuinely unknown helps you ask better questions and build a smarter budget.
For the wider pricing context, start with new roof cost Ireland 2026.
Cost 1: Scaffolding
This is the most commonly omitted line from Irish roofing quotes.
Some contractors bundle it in. Most do not. And because it can vary so much, many contractors prefer to quote it separately once they have assessed the access.
What affects scaffolding cost?
- Building height: A single-storey extension needs a working platform at eaves level. A three-storey terrace in Dublin needs a much more substantial rig.
- Access restrictions: Narrow footpaths, parked cars and no-parking zones in urban areas add time and complexity to erection.
- Number of sides: A detached house needs scaffolding on four sides. A terraced house on two (and sometimes only one, if the rear is not being worked on).
- Duration: Scaffolding is hired for the duration of the job plus one to two days either side. Delays due to weather or unexpected structural work mean additional hire days.
2026 scaffolding costs for roofing work
| Property type | Typical scaffolding cost |
|---|---|
| Single-storey extension or garage | €800–€1,400 |
| Standard two-storey semi-D | €1,200–€2,000 |
| Three-bed detached (all sides) | €1,800–€2,800 |
| Three-storey terraced (city) | €2,200–€3,500 |
| Bungalow (all sides) | €1,200–€1,800 |
Always ask: "Is scaffolding included in this quote, and if not, what will it cost?"
A contractor who cannot give you a straight answer on scaffolding is not ready to give you a proper quote.
Cost 2: Skip Hire and Waste Disposal
Stripping a roof generates a lot of waste. Old concrete tiles, broken slates, rotten battens and old felt need to be removed from the site and disposed of legally.
How much waste does a roof strip produce?
Concrete tiles weigh about 45–50 kg per m². A 90 m² roof strip produces approximately 4,000–4,500 kg of tile waste alone, before adding battens and felt.
A standard skip (six-yard) holds about 3,000–4,000 kg depending on how it is loaded. Most full strip jobs need two skips as a minimum.
2026 skip and waste disposal costs
| Item | Typical cost |
|---|---|
| Standard 6-yard skip (1–2 weeks hire) | €320–€420 |
| Landfill gate fee per tonne | €80–€150 |
| Lead flashing and old flashings (hazardous) | €50–€100 extra |
| Total for a standard semi-D | €550–€900 |
Ask your contractor:
- How many skips are included in the quote?
- Is landfill disposal included or charged per tonne?
- Who is responsible for skip permits if parking a skip on a public road?
Dublin and other urban councils charge for skip permits. The permit fee (usually €80–€150) is often not included in the quote.
Cost 3: Rotten Timber
This is the most unpredictable hidden cost, and also the most important.
When old tiles are stripped and the roof structure is exposed for the first time in 20, 30 or 40 years, contractors frequently find:
- Rotten rafter ends at the eaves, caused by decades of condensation and water ingress
- A sagging ridge board that has deflected under the weight of the original tiles
- Damaged wall plate sections where water has tracked down the inside of the fascia
- Undersized hip rafters on older properties that do not meet current structural requirements
None of this can be seen from outside before the strip. That is why reputable contractors cannot fix-price structural work in advance.
Typical timber repair costs
| Work | Typical cost |
|---|---|
| Rafter end repair (splice and fix) | €300–€600 per rafter |
| Full rafter replacement | €500–€900 per rafter |
| Ridge board replacement (semi-D) | €600–€1,200 |
| Wall plate repair (per linear metre) | €80–€150 |
A typical older semi-D will have three to six rafters needing attention. Budget €1,500–€4,000 as a contingency for structural surprises.
A good contractor will call you before doing any structural work and give you a written change order with the cost. Never allow a contractor to proceed with significant structural work without your written agreement on price.
Cost 4: Chimney Repointing and Flashing
Chimney flashings have a lifespan of 30–50 years. If your roof is being replaced on a house built before 1990, the flashing has likely had one or two lifetimes already.
Replacing the flashing while the scaffolding is up costs a fraction of what it would cost to erect scaffolding again separately in five years' time.
What chimney work costs in 2026
| Work | Typical cost |
|---|---|
| New lead or code 4 aluminium flashing around one chimney | €350–€600 |
| Full chimney repoint (mortar repairs to brick/stone) | €400–€900 |
| Chimney flaunching replacement (the sloped concrete cap) | €200–€400 |
| Chimney pot and cowl replacement | €150–€350 |
| Stack rebuild (where chimney has deteriorated structurally) | €1,500–€4,000 |
Most Irish roof replacements include standard flashing in the quote. Full repointing, flaunching and stack work are typically priced separately.
Ask your contractor to inspect the chimney stack during the quote visit and include an allowance if it is in poor condition.
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Cost 5: Insulation Upgrade (Part L Regulations)
This is the hidden cost that most online guides do not mention at all.
Under Part L of the Irish Building Regulations, if the works you are carrying out affect more than 25% of the existing building envelope, you are required to bring the thermal performance of that element up to current standards.
For a full roof replacement on a house that has no attic insulation or under-specification insulation, this means:
- Installing 300mm of mineral wool attic insulation, OR
- Upgrading to the equivalent thermal value using rigid insulation board between rafters
The good news is that SEAI grants can cover most of this cost.
SEAI attic insulation grant (2026):
- Detached house: up to €2,000
- Semi-detached / end of terrace: up to €1,300
- Mid-terrace: up to €1,200
The grant has to be pre-approved before the work starts. Work must be done by an SEAI-registered contractor.
Combining the insulation work with a roof replacement makes complete financial sense because the scaffolding is already up and the attic is accessible.
Cost 6: Fascia, Soffit and Gutters
These are often in poor condition by the time a roof needs replacing, because they are exposed to the same weather and age at a similar rate.
Replacing them while scaffolding is up is almost always cheaper than doing it separately later.
| Work | Typical cost |
|---|---|
| uPVC fascia replacement (per linear metre) | €25–€40 |
| Soffit replacement (per linear metre) | €20–€35 |
| Full fascia and soffit replacement (semi-D) | €1,500–€3,000 |
| Gutter replacement (per linear metre) | €18–€28 |
| Full gutter replacement (semi-D) | €800–€1,600 |
Combining these with a roof replacement saves one scaffolding hire, which is worth €1,000–€2,000 in cost.
How Much Should I Budget for Hidden Costs?
A practical approach:
| House age | Contingency to add |
|---|---|
| Under 20 years old | 8–10% of quote |
| 20–30 years old | 12–15% of quote |
| 30–40 years old | 15–20% of quote |
| Over 40 years old | 20–25% of quote |
An older house is not necessarily a sign of poor quality. Irish houses from the 1960s and 1970s were built with good-quality structural timber. But after 50+ years, rafter ends suffer from repeated wetting and drying cycles regardless of the original quality.
How to Protect Yourself Against Unexpected Costs
Ask for a change order clause in writing. Your contract should state that any additional work above the quoted scope requires a written change order with a cost agreed before the work begins.
Ask your contractor to do a pre-strip inspection. Some experienced contractors will inspect the attic from inside before stripping the roof. This does not eliminate surprises but can identify obvious problems in advance.
Never pay for structural work verbally. If a contractor calls to say they have found rotten timbers and need an extra €3,000, ask them to send you a written change order before they proceed. A legitimate contractor will do this without hesitation.
Hold retention. Keep back 5–10% of the total payment until the job is fully finished and you are satisfied. This gives you leverage if any issues arise after completion.
If you want a contractor-first checklist for comparing written quotes, read how to get roofing quotes Ireland.
Frequently Asked Questions
Why is scaffolding not included in most roofing quotes in Ireland?
Because it varies significantly by property, access and duration, many contractors prefer to quote it separately after assessing the site. Some include it; most do not. Always confirm explicitly.
Is skip hire usually included in a roofing quote?
It depends on the contractor. About half of Irish roofing quotes include skip hire. The other half add it as an extra. Always ask before assuming it is included.
What happens if the contractor finds rotten timbers?
A reputable contractor will stop, show you the damage, provide a written cost estimate for the repairs and wait for your approval before proceeding. Never allow a contractor to carry out structural repairs without agreeing the cost in writing first.
Can I avoid the Part L insulation requirement?
If your existing attic insulation already meets current standards (300mm mineral wool or equivalent), no upgrade is required. If it is under-specification, the upgrade is a legal requirement under Part L if the roof replacement triggers the 25% rule. In practice, most SEAI grant recipients find the grant more than covers the cost.
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