In order to build the walls correctly, it is necessary to do this gradually, giving the layers to dry a little and contact. Each row of bricks or blocks must be laid in turn, constantly checking a special level of wall slope. This is done so that the walls of the house are not littered in different directions. If you have already laid out several rows, then you should not immediately load the following on them. Give the design time a little stronger. It is better to carry out such actions the next day.