Roof Replacement Cost Calculator
Estimate roof replacement costs from dimensions and material choice. Get material, labour, skip, and scaffold cost breakdowns. Free, no signup.
Draft Smart Component
Build a component with pricing, waste, and labour rules, then calculate cost from measurements
Component spec
Area measurement in square metres. Used for roofing, flooring, cladding.
Measurement
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Roof replacement — did you know?
Cost components of a roof replacement
Materials (30-40%): tiles, membrane, battens, nails. Labour (40-50%): strip, dispose, re-batten, re-tile. Scaffolding (10-15%): front and rear access. Skip (2-5%): roofing waste is bulky. Extras: flashing, verges, ridge ventilation.
Cost per m² by material
Concrete tile re-roof: £60-90/m². Clay tile: £80-120/m². Slate: £100-180/m². Metal standing seam: £70-110/m². EPDM flat roof: £50-80/m². These are UK 2024 averages including labour.
Strip and dispose costs
Stripping adds ~£15-25/m² to the job. Disposal: 1 tonne of tile per ~8 m² of roof. 100 m² roof = 12.5 tonnes. Skip hire: £250-400. Some merchants take back tiles (reduces skip cost). Asbestos cement: specialist disposal, £500+.
When to repair vs replace
Repair if: <20% of tiles damaged, isolated leak, flashings failed. Replace if: >30% tiles damaged, sagging roof, multiple leaks, no membrane (pre-1970s), battens rotten. Borderline (20-30%): get a structural survey first.
Formulas used
Total cost
total = (materials + labour + scaffold + skip) × roof_area
Material cost
materials = area × material_rate_per_m²
Labour cost
labour = area × labour_rate_per_m²
Strip cost
strip = area × strip_rate_per_m²
Frequently asked questions
How much does a roof replacement cost?
UK: £60-90/m² concrete, £80-120/m² clay, £100-180/m² slate, £70-110/m² metal. 100 m² concrete tile re-roof: £6,000-9,000+ including labour and scaffold.
How much to strip and dispose of old roof?
£15-25/m². 100 m² roof generates ~12.5 tonnes of waste. Skip: £250-400. Some merchants take back undamaged tiles.
Should I repair or replace my roof?
Repair if <20% damage. Replace if >30% damage, sagging, multiple leaks, no membrane, or rotten battens. 20-30%: get a survey.
Best free roof replacement cost calculator?
One that breaks down materials, labour, scaffold, and disposal. This tool does all, free.