| Value | Category | 
|---|---|
| 10 | NATURAL | 
| 11 | No walls | 
| 12 | Cane/palm/trunks | 
| 13 | Dirt | 
| 20 | RUDIMENTARY | 
| 21 | Bamboo with mud | 
| 22 | Stone with mud | 
| 23 | Plywood | 
| 24 | Cardboard | 
| 25 | Reused wood | 
| 30 | FINISHED | 
| 31 | Cement | 
| 32 | Stone with lime/cement | 
| 33 | Bricks | 
| 34 | Cement blocks | 
| 35 | Wood planks/shingles | 
| 36 | Sheet metal | 
| 37 | Tiles/ceramic | 
| 96 | OTHER |