Need a special

To make the surface smooth and flat, apply a layer of primer. Apply it correctly, and also give a few days to complete drying. In this case, dust will not be collected on the surface. For better vapor barrier, you will need a special film. And then already, using adhesive mastic, you mount a moisture -resistant plywood to the base of the floor. Usually for reliability, it is still screwed to the floor. Piece parquet will also need to be fixed well.