How to use the Roof Tiling Cost Calculator
- Enter roof area in m². Use plan take-offs or measure length × slope width for each pitch.
- Select tile type and pitch. Choose add-ons for ridges, hips, valleys and leadwork if required.
- Add an access allowance. Scaffolding is common on most re-roofs.
- Review totals including VAT and export or copy the result.
Use this for budgeting. For tender pricing and warranty clauses, request a QS estimate with BoQ, prelims, overheads and profit, and risk allowances.
Typical re-roofing costs per m²
- Concrete interlocking tiles: £85 to £130 per m² including VAT
- Clay tiles: £110 to £160 per m² including VAT
- Natural slate: £140 to £220 per m² including VAT
These include strip and retile with breathable underlay and battens. Complex details and access are extra.
Common uplifts and allowances
- Scaffolding & access: allow a project uplift that often sits between £1,200 and £2,800 on a typical semi, or use the calculator’s per m² proxy
- Ridges and hips: linear metres priced for dry systems or mortar bed as specified
- Valleys and abutments: extra time and materials for cuts and trays
- Waste and disposal: skips or licensed disposal are included in the base but vary by local rates
What drives roof tiling cost
- Tile type and pitch: heavier tiles and steeper pitches increase labour
- Condition of structure: replacement rafters, noggins or fascia add cost
- Weathering details: valleys, dormers, roof windows and leadwork increase complexity
- Access and parking: restricted sites need more scaffold and handling time
Worked example: 60 m² semi-detached roof
Concrete interlocking tiles at £110 per m²: £6,600 including VAT.
Ridge and hip at 20 l/m with dry fix allowance: add £400 to £700.
Scaffolding project uplift: add £1,200 to £2,000.
Indicative total: about £8,200 to £9,300 including VAT, subject to pitch, details and access.
Scope assumptions
Strip and retile to existing roof with breathable underlay and treated battens, standard verge and ridge detail, reuse of suitable flashings where acceptable, disposal of arisings. New leadwork, ventilation upgrades, structural timber repairs and insulation upgrades are excluded unless selected.