Guide for homeowners · Cost benchmark
Roof replacement and repair cost in NI: 2026 price guide
By Conor Hamilton, Building & Renovation Contributor · 10 minute read
Published 7 June 2026 · Last reviewed 7 June 2026
Reviewed every quarter and updated whenever prices, platforms or recommendations change in the Northern Ireland market.
Edited by Mark Crawford, Digital Content Editor.
A full re-roof on a typical Northern Ireland semi runs roughly £6,000 to £16,000 in 2026 depending on the material, with concrete tile at the lower end and natural slate at the top. Minor repairs like replacing slipped slates start around £150. This guide breaks the cost down by tier, by material per square metre, and by common repair, plus the NI weather and Building Control factors that move the price.
What a re-roof costs in NI (2026)
Three tiers cover most full re-roofs. These are turnkey figures for stripping the old covering and re-roofing a typical house, including battens, breathable membrane, ridge and flashing.
| Tier | Typical spec | Cost (2026) |
|---|
| Budget | Concrete tile or fibre-cement slate, semi-detached | £6,000 to £10,000 |
| Mid-range | Clay tile or natural Spanish slate, semi-detached | £10,000 to £16,000 |
| Premium | Welsh natural slate, detached, full strip and new timbers | £16,000 to £28,000+ |
Source: 2026 quotes from FMB-member NI roofers, cross-checked against Republic of Ireland comparison anchors (RoofQuote.ie, Keystone Roofing) converted from euro and UK material-cost data. NI rates run roughly 10 to 20 per cent below the GB mainland; labour is typically half to two-thirds of a re-roof.
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Re-roof cost per square metre, by material
Material is the biggest driver. These NI 2026 rates are supplied and fitted, including new battens, membrane and ridge.
| Material | NI rate (2026) | Note |
|---|
| Concrete tile | £90 to £140 / m² | Most common, includes battens, membrane, ridge |
| Clay tile | £100 to £150 / m² | Longer life, traditional look |
| Fibre-cement / synthetic slate | £85 to £130 / m² | Lighter and cheaper than natural slate |
| Natural slate (Spanish) | £140 to £210 / m² | The common natural-slate choice |
| Natural slate (Welsh) | £210 to £280 / m² | Premium, often required in conservation areas |
Source: NI roofer quotes and ROI per-m² anchors, June 2026. A typical semi-detached roof is around 80 to 100 m²; a detached home 120 to 150 m². Stripping the old covering and any new structural timber is usually on top of these rates.
Common roof repair costs
Most roofing calls in NI are repairs, not full re-roofs. These are the typical 2026 ranges.
| Repair | NI range (2026) | Note |
|---|
| Replace slipped or broken slates / tiles | £150 to £400 | Minor repair, access dependent |
| Re-bed and repoint the ridge line | £400 to £1,200 | Common after high winds |
| Lead flashing (chimney or valley) | £300 to £900 | Frequent leak source |
| Chimney repointing or partial rebuild | £500 to £2,500 | Common on oil and solid-fuel homes |
| Fascia, soffit and guttering (full) | £1,500 to £4,000 | Often done alongside a re-roof |
| Flat roof replacement (garage or extension) | £1,500 to £4,000 | EPDM or GRP, by size |
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What drives the price
- Material. Concrete tile is cheapest, natural Welsh slate the dearest, with clay tile and fibre-cement slate in between. This is the single biggest lever.
- Roof size and complexity. Valleys, hips, dormers and multiple chimneys all add labour over a simple gable roof.
- What is under the old covering. Once a roof is stripped, rotten battens, failed felt or damaged rafters can add cost, which is why a contingency matters.
- Access and scaffolding. Roofing is working at height, so safe scaffold access is a required cost, more on tall or awkward sites.
- Fascia, soffit and guttering. Often replaced at the same time while the scaffold is up, which is efficient but adds to the headline figure.
The NI-specific factors
- Weather and fixing spec. NI gets heavy wind and driving rain, especially on the coast and uplands, so tiles should be mechanically clipped or nailed and the membrane chosen for exposure. It costs a little more and is why cheap roofs fail early here.
- Natural slate heritage. A lot of older NI housing is slate, and conservation areas and listed buildings often require a like-for-like natural-slate re-roof rather than a cheaper tile.
- Chimneys. With so many homes on oil or solid fuel, chimney flashing and repointing are among the most common NI roof repairs.
- Building Control on big jobs. Re-covering more than about a quarter of a roof slope counts as renovating a thermal element under NI Building Regulations and can require an insulation upgrade at the same time. See our NI Building Regulations guide.
Source: Building Regulations (Northern Ireland) 2012, Technical Booklet F1 (conservation of fuel and power) on renovation of thermal elements; and HSENI working-at-height guidance for scaffolding.
The costs people forget
- Scaffolding. A required access cost, typically £700 to £1,800 depending on height and the time it is up.
- Waste and disposal. Stripping a roof generates a lot of waste; skips and tipping are often itemised separately.
- Hidden timber repair. Budget a 10 to 15 per cent contingency for rot or damaged rafters found once the covering is off.
- Insulation upgrade. On a large re-roof that triggers Building Control, bringing the roof up to current insulation standard adds cost.
- VAT at 20 per cent. Roofing work is standard-rated; always check whether a quote includes it.
What to do next
Four steps before you sign anything.
1
For storm damage, get the roof inspected quickly before a small problem spreads.
2
For a re-roof, decide the material and measure the roof area to sanity-check quotes against the per-m² rates above.
3
Get three written quotes for the same scope, including scaffolding and waste.
4
Post the job free below and vetted NI roofers will respond.
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Frequently asked questions
How much does a new roof cost in NI in 2026?
A full re-roof on a typical Northern Ireland semi-detached house runs roughly £6,000 to £10,000 in concrete tile, and £10,000 to £16,000 in clay tile or natural Spanish slate. A larger detached home in Welsh natural slate can reach £16,000 to £28,000 or more. The figure depends mainly on the roof area, the covering material, and whether the timbers and membrane underneath need replacing once the old covering comes off.
How much does a re-roof cost per square metre in NI?
In NI in 2026, expect roughly £90 to £140 per square metre for a concrete tile re-roof, £100 to £150 for clay tile, £85 to £130 for fibre-cement or synthetic slate, and £140 to £280 per square metre for natural slate depending on whether it is Spanish or Welsh. Those rates include new battens, a breathable membrane, ridge tiles and flashing. Stripping the old covering and any new structural timber is usually on top.
How much does it cost to repair a roof in NI?
Minor repairs are far cheaper than a re-roof. Replacing a few slipped or broken slates is around £150 to £400, re-bedding and repointing the ridge line is £400 to £1,200, and chimney flashing or lead work is £300 to £900. Chimney repointing or a partial rebuild, common on NI homes with oil or solid-fuel flues, runs £500 to £2,500. After a storm, get the roof inspected promptly, small problems left unfixed are how you end up needing a full re-roof.
Do I need Building Control approval to re-roof a house in NI?
Often, yes. Replacing more than about a quarter of a roof slope counts as renovating a thermal element under NI Building Regulations, which can require you to upgrade the roof insulation to the current standard at the same time. A like-for-like minor repair does not. Your roofer should know the threshold, and we explain how NI Building Control works in our Building Regulations guide. If your home is listed or in a conservation area, you may also be required to re-roof in matching natural slate.
Why does the NI weather matter for roofing cost?
Northern Ireland gets a lot of wind and driving rain, especially on the coast and uplands, so a roof here has to be fixed for it. That can mean mechanically clipping or nailing every tile rather than relying on gravity, and a good breathable membrane underneath. It costs a little more up front but it is why cheap roofs fail early here. The same weather is why storm-damage repairs (slipped tiles, lifted ridges, flashing leaks) are the most common roofing call-out in NI.
About the author
Conor HamiltonBuilding & Renovation Contributor · Newtownards, Northern Ireland
Conor writes the NI building and renovation cost benchmark guides for NI Trades. He draws on a civil-engineering background and on quotes from working FMB, OFTEC and NICEIC tradespeople across Northern Ireland to keep the price ranges realistic. He holds a BEng (Hons) in Civil Engineering from Queen’s University Belfast.
BEng (Hons) Civil Engineering, Queen’s University Belfast