Tile vs Slate Roof — UK Roofing Comparison
Comparing concrete interlocking tiles and natural slate for UK roofing — weight, cost, lifespan, aesthetics and planning considerations.
Side-by-Side Comparison
| Property | Concrete Tiles | Natural Slate | Artificial Slate |
|---|---|---|---|
| Supply cost per m² | £12-25 | £40-80 | £20-40 |
| Installed cost per m² | £50-75 | £80-140 | £60-95 |
| Lifespan | 50-60 years | 75-150+ years | 30-50 years |
| Weight per m² | 42-52 kg | 25-45 kg | 15-25 kg |
| Minimum pitch | 17.5° (interlocking) | 20-25° (size dependent) | 15-20° |
| Coverage per unit | ~10 per m² | ~20-25 per m² | ~20 per m² |
| Colour retention | Fades over 10-15 years | Minimal change | Good (20+ years) |
| Frost resistance | Good | Excellent (S1 grade) | Good |
| Conservation area | Often not accepted | Usually required | Sometimes accepted |
Pros and Cons
Concrete Interlocking Tiles
Pros
- + Much cheaper upfront
- + Faster to install (fewer units per m²)
- + Wide range of profiles and colours
- + Easy to source replacement tiles
- + Good 50-60 year lifespan
Cons
- - Heavier than slate
- - Colour fades over time
- - Moss growth common (north-facing)
- - Not accepted in conservation areas
- - Less premium appearance
Natural Slate
Pros
- + Outstanding lifespan (100+ years)
- + Premium appearance, adds property value
- + Lighter than concrete tiles
- + Accepted in conservation areas
- + Minimal colour change over time
Cons
- - Significantly more expensive
- - Slower to install (more units, nailing)
- - Individual slates can delaminate
- - Replacement slates may not match
- - Requires experienced slater
UK Cost Comparison (2026 Prices)
For a typical 80 m² semi-detached roof (strip and re-roof):
| Cost Element | Concrete Tiles | Natural Slate |
|---|---|---|
| Strip existing | £800-1,200 | £800-1,200 |
| Felt & battens | £1,000-1,500 | £1,000-1,500 |
| Tiles/slates (supply) | £960-2,000 | £3,200-6,400 |
| Ridges, hips, fixings | £400-600 | £300-500 |
| Labour | £2,400-3,600 | £3,200-5,200 |
| Scaffolding | £800-1,200 | £800-1,200 |
| Total | £6,360-10,100 | £9,300-16,000 |
When to Choose Each
Choose Concrete Tiles When
- Budget is the primary concern
- Standard estate or modern property
- Matching neighbouring properties
- Low-pitch roofs (down to 17.5°)
- 50+ year lifespan is sufficient
Choose Natural Slate When
- Conservation area or listed building
- Period property restoration
- Premium new build or extension
- Maximum lifespan (100+ years)
- Weight reduction is beneficial
Environmental Considerations
Concrete tiles have moderate embodied carbon from cement production. Natural slate is quarried stone with low processing energy but may have significant transport emissions if imported from Spain or Brazil rather than Welsh quarries. Slate's much longer lifespan means fewer replacements over a building's life. Both materials are inert and recyclable — old slates can be salvaged and reused, while concrete tiles can be crushed for aggregate.
Related Calculators
- Roof Tile Calculator — calculate concrete tiles, battens and fixings
- Slate Roof Calculator — calculate slates, nails and underlay
How We Calculate This
Frequently Asked Questions
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Last updated: April 2026
All calculations are estimates. Verify with your supplier.