To begin with, vertical rows are marked.

The first stage is marking. To begin with, vertical rows are marked. All operations are carried out from the point located on the wall in the central part. For this purpose, the width of the wall is measured, and then it is calculated where its center is located, which is immediately marked with a pencil. Then, applying the ruler to the wall so that its mark coincides with the center, placing in a horizontal plane, determine the amount of whole tiles necessary for laying and perform a mark with a pencil.