First, we are freed from furniture, remove skirting boards, tiles, linoleum, clean the base to the concrete slab, removing all the small garbage. We denote the line of the screed horizon on the walls of the room using a level, putting the marks every couple of meters, and connect. In this case, the thickness of the screed should be up to four centimeters. The next step is to apply a special primer of deep penetration, laying a bitumen tape, set the beacons.