In places where the soil water table is low and rainfall is not much a 75 to 100 mm thick layer of coarse sand is first spread over the entire area of flooring on the prepared bed of rammed earth. Alternatively this layer can comprise of stone soling with voids filled with smaller stones. This layer is known as base coarse and its material is well rammed. A 75 to 100 mm thick layer of lean cement concrete (1:3:6 or 1:4:8) mix or lime concrete is thereafter laid over the base course. This forms the base for the floor topping, which may comprise of tiles, stones or cement concrete etc.
In places where the sub soil water table is high or in damp or humid areas, where there is possibility of moisture rising up in the floors, it is necessary to provide membrane damp proof course of flexible material like bitumen felt etc. over the entire area of flooring.
Last modified: Wednesday, 29 February 2012, 7:34 AM
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