| Value | Category |
|---|---|
| 11 | no walls |
| 12 | cane/palm/trunks |
| 13 | dirt |
| 21 | bamboo with mud |
| 22 | stone with mud |
| 23 | uncovered adobe |
| 24 | plywood |
| 25 | cardboard |
| 26 | reused wood |
| 31 | cement |
| 32 | stone with lime/cement |
| 33 | bricks |
| 34 | cement blocks |
| 35 | covered adobe |
| 36 | wood planks/shingles |
| 96 | other |