India - Housing Condition Survey, July 2008- June 2009, NSS 65th Round

Information on the basic building materials with which the floor, walls and roof of the dwelling unit are constructed will be collected and recorded in codes against Q.14, 15 and 16, respectively.
When the basic building materials used are different for different walls, the materials used for major portion of wall area of the dwelling will be the wall type. For determining the wall type, only the walls of the dwelling will be considered. Roof / floor type will also be determined on the basis of the material used for major portion of roof / floor area of the dwelling, if the different portions of the roof / floor are made of different building materials. For determining the material of the roof, the material of which the outer roof exposed to the weather (and not the ceiling) is made, i.e., tiles, thatch, corrugated iron, zinc or asbestos sheet, etc., will be considered. However, if the roof is mainly made of bricks, tiles, stone, etc., with the mud, cement or lime plaster exposed to the sky, the material of roof will not be mud, cement, lime, etc. but it will be brick, tile, stone, etc. which constituted the fabric of the roof.