It is an old type of flat roof used in the old Madras province. This type of roofing is not used now-a-days. It consists of three layers, viz., terrace bricks, brickbat concrete and flat tiles placed in this order in lime mortar over wooden joists (Fig. 25.11).
Figure 25.11 Madras terrace roof
Teak wood joists are placed at suitable spacing over RSJ or wall. Terrace bricks are placed on edge in lime mortar diagonally across the joists. A thick brickbat course is laid over the brick course. After the setting of brickbat course, three courses of flat tiles are laid in lime mortar. Finally the top surface is plastered with three coats of lime mortar and the bottom ceiling between the joist is plastered with lime or cement mortar.
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