| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 3 |
0.3%
|
| 1 | Metal, tin or zinc | 448 |
37.3%
|
| 2 | Tiles | 24 |
2%
|
| 3 | Shingles | 2 |
0.2%
|
| 4 | Thatch or grass | 205 |
17.1%
|
| 5 | Plastic sheets | 2 |
0.2%
|
| 6 | Asbestos | 116 |
9.7%
|
| 7 | Multiple materials | 41 |
3.4%
|
| 8 | Concrete | 335 |
27.9%
|
| 9 | Some other material | 12 |
1%
|
| 10 | Could not tell / could not see | 12 |
1%
|