| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 1 | Metal, aluminum, tin or zinc | 28 |
2.3%
|
| 2 | Tiles | 2 |
0.2%
|
| 3 | Shingles | 1 |
0.1%
|
| 4 | Thatch or grass | 3 |
0.3%
|
| 5 | Plastic sheets | 2 |
0.2%
|
| 6 | Asbestos | 1 |
0.1%
|
| 7 | Multiple materials | 35 |
2.9%
|
| 8 | Concrete | 1123 |
93.6%
|
| 9 | Some other material | 5 |
0.4%
|
| 10 | Could not tell / could not see | 0 |
0%
|