| Value | Category |
|---|---|
| 1 | Cement or concrete |
| 2 | Cement block or tile |
| 3 | Adobe or mud |
| 4 | Wood, mud and thatch (Bahareque) |
| 5 | Cane, palm leaves, straw, and similar |
| 6 | Waste materials (cardboard, cans, planks, etc.) |
| 7 | Other materials |
| 8 | Unknown |
| 9 | NIU (not in universe) |