Most of the houses In villages are built with sun-dried bricks or blocks or with lump-mud. Mud walls are usually sought to be protected against damage from rain by applying mud plaster. consisting of local soil or mud, collected from village ponds, and mixed with chopped straw and rendered with cowdung slurry. While this conventional method is cheap, it can't withstand even a few hours of driving rain and the wall gets eventually damaged after the rain. What we require is a plastering treatment which will improve the durability of mud houses upto 10 to 12 years. It is to be realised that the mud plaster should be non-erodable and secondly, it should be water proof. If the plaster allows water to penetrate into the wall, then the plaster will separate from the wall while drying, due to differential shrinkage. Other methods are also described as alternatives.
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