What is roofs and type of roofs

ROOFS Roof is the topmost portion of the building. The roofs may be classified as flat or terraced roofs, pitched or sloping roofs, folded plate and shell roofs. Flat roofs They may have slight slope (not more than 10°) in order to drain rainwater. The following types of flat roofs are popular in India: Punjab terrace roofs, Maharashtra and M.P. terrace roofs, Madras terrace roofs, Bengal terrace roofs and R.C.C. roofs. * Pitched/Sloping Roofs : In areas where rainfall is more or snowfall takes place, pitched roofs are preferred. The slope of the roof may vary as much as 40° to 60°. * Technical terms used with pitched roofs are : Ridge is apex line of sloping roof. Hip is the line formed by intersection of two sloping surfaces, where exterior angle is more than 180°. In valleys interior angle is less than 180°. The lower edge of the sloping surface of a roof is known as eave. Gable is the vertical triangle of the wall supporting a sloping roof. Ridge piece is a wooden piece providing a...