Literal question
2. Main materials
Walls
[] 1 Stone, dressed stone, millstone, building stone, brick, hollow brick, cement, chip wood, cinder block
[] 2 Other materials such as: wood, wood beams and cob, clay masonry, etc.
____ Specify
Roof
[] 1 Tile, slate, asbestos or similar material; aluminum, steel, copper, zinc, terrace.
[] 2 Other materials such as: straw, sheet metal, flat stone, bitumen, etc.
Interviewer instructions
3.3.2. Question 2: Principal materials
Walls: Mark one and only one of the two boxes while making an effort to specify the material or materials used.
In more of the materials explicitly numbered in section 2, you will classify the nondurable materials used for temporary structures in this section. For the buildings made of wood, wooden panels and cob, always check box 2 even if this is a durable structure (it is question 1 which will inform others on the subject of the temporary nature or durability of the structure.)
[p.20]
In a situation where two of the same kinds of materials (section 1 and 2) are used (in the case of farms or agricultural buildings, for example), check the only section corresponding to the kind of material principally employed in the building or the part of the building which is lived in.
Roof - The explanations given above for the walls are to be applied as well for the roof.