Alignment of walls, floor and ceiling. You can avoid these works if you opted for PVC panels. A crate of bars is attached on the surface, then the panels are mounted. This is a quick and economical way, but the probability of the appearance of the fungus is very high. Over time, an unpleasant odor is guaranteed due to moisture. Therefore, it is better to align the walls with plaster. This will save tile expenses. In addition, you will extend the service life.