Section 11(1) in The Chennai City Corporation Building Rules, 1972
(1)Every wall and pier of the building except when built on materials such as steel or reinforced cement concrete 1:2:4, shall be provided with a damp-proof course of one of the following:-(a)one part cement, two parts coarse sand and five per cent pudlo or some similar moisture,(b)bitumen sheeting,(c)a layer of 1:2:4 cement concrete four centimetres with two coats of bitumen on top or with pudlo or composeal,(d)impervious stone slabs not less than five centimetres thick and eight centimetres wider than the width of basement the stone slabs being fixed with cement mortar 1:2, and(e)any other impervious material approved by the authority having jurisdiction.
