Of all, it is

An important role in the repair is played by the alignment of the surfaces of the room, because if this is not done, then all the irregularities, chips, roughness on the ceiling and walls will be visible, and the floor covering will not fit on the uneven floor. Starting the repair, first of all, it is necessary to completely dismantle the old finish in the room, that is, leave the “bare walls” and start aligning the floor surface.