| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 54 |
0.1%
|
| 1 | Metal, tin or zinc | 28562 |
53%
|
| 2 | Tiles | 2832 |
5.3%
|
| 3 | Shingles | 300 |
0.6%
|
| 4 | Thatch or grass | 10017 |
18.6%
|
| 5 | Plastic sheets | 325 |
0.6%
|
| 6 | Asbestos | 2239 |
4.2%
|
| 7 | Multiple materials | 1388 |
2.6%
|
| 8 | Concrete | 7102 |
13.2%
|
| 9 | Some other material | 833 |
1.5%
|
| 10 | Could not tell / could not see | 283 |
0.5%
|