| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 1 | Metal, tin or zinc | 6 |
0.5%
|
| 2 | Tiles | 2 |
0.2%
|
| 3 | Shingles | 0 |
0%
|
| 4 | Thatch or grass | 48 |
4%
|
| 5 | Plastic sheets | 0 |
0%
|
| 6 | Asbestos | 19 |
1.6%
|
| 7 | Multiple materials | 177 |
14.8%
|
| 8 | Concrete | 912 |
76.1%
|
| 9 | Some other material | 23 |
1.9%
|
| 10 | Could not tell / could not see | 11 |
0.9%
|