Vegetal soil is cleaned below the foundation level, filled with coarse grained rubble stone, pressed and covered with 10 cm plane concrete layer. On the plane concrete, Pp 4000 membrane water proof material is stretched on the surface in order to cover the side walls of the raft foundation as described in latter foundation process for water and damp proof. Membrane layer is carefully covered with mat and another layer of protection concrete, not to be damaged at the latter processes.
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