| Roof covering | Minimum pitch | US equivalent | Standard |
|---|---|---|---|
| Plain clay tiles | 35° | 8.40/12 | BS 5534 |
| Concrete interlocking tiles | 17.5° | 3.78/12 | BS 5534 |
| Large format interlocking tiles | 15° | 3.22/12 | BS 5534 |
| Natural slate | 20° | 4.37/12 | BS 5534 |
| Fibre cement slate | 20° | 4.37/12 | BS 5534 |
| Standing seam metal | 5° | 1.05/12 | Manufacturer |
| Single-ply membrane | 1° | 0.21/12 | BS 6229 |
