| Value | Category |
|---|---|
| NIU (not in universe) | |
| 1 | Permanent: concrete |
| 2 | Permanent: cement blocks |
| 3 | Permanent: stones |
| 4 | Permanent: burnt / stabilised brick |
| 5 | Permanent: unburnt bricks with cement |
| 6 | Permanent: unburnt bricks with mud |
| 7 | Temporary: wood |
| 8 | Temporary: mud and pole |
| 9 | Temporary: other |