Value | Category |
---|---|
1 | Wood |
2 | Sheet metal |
3 | Adobe or clay |
4 | Semi-permanent (earthen bricks with joints, cement, or cement-covered adobe) |
5 | Geopolymer concrete (earthen brick, mixed with cement, made by a machine) |
6 | Hard (stone, cement bricks, concrete, or similar) |
7 | Other |
8 | Unknown |
9 | NIU (not in universe) |