| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 1 |
0.1%
|
| 1 | Metal, tin or zinc | 969 |
82%
|
| 2 | Tiles | 36 |
3%
|
| 3 | Shingles | 2 |
0.2%
|
| 4 | Thatch or grass | 82 |
6.9%
|
| 5 | Plastic sheets | 48 |
4.1%
|
| 6 | Asbestos | 6 |
0.5%
|
| 7 | Multiple materials | 16 |
1.4%
|
| 8 | Concrete | 9 |
0.8%
|
| 9 | Some other material | 12 |
1%
|
| 10 | Could not tell / could not see | 1 |
0.1%
|