The roof accounts for about 20 percent of the total cost. Periodic changes, susceptibility to fire hazards and certain other factors advocate against the use of thatched roof. Although tile roofs are popular in many areas, high cost, thermal discomfort and the unavailability of well-weathered palmyra or other wooden rafters are major disadvantages.
Asbestos roofing replaced tiled roofing to a certain extent, but is not popular due to health risks, cost, and thermal discomfort. Madras Terrace is now obsolete due to non-availability of skilled labor and heavy dead weight.
Reinforced concrete (RC) slab is a very good alternative to flat roof in such situations.
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