| 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 |