Most often, the walls are far from vertical.

The first stage of repair — dismantling.

Repair begins with the removal of the entire old finish. It is necessary to dismantle the old bath, sink. Remove the old tile. After the end of the dismantling work, you need to check the verticality of the walls. Most often, the walls are far from vertical. In order to make no problems with the joint of the seams in the corners when laying tiles, and the bath adjusted to the wall exactly, it will be necessary to level the walls. To do this, use plastering on the beacons. To install plaster beacons, you need to use the level and the rules to find the most protruding point on the wall. It will be a zero mark.