Cracks in the foundation: how to monitor growth and prevent expansion
If the crack on the facade of the building appeared due to the natural shrinkage and has stopped increasing for some time, it is simply closed with cement mortar. No additional measures will need to be carried out. To fill the crack with the solution, it is necessary to first expand it to deepen, and only after that is taken as the solution. Otherwise, the cement composition under the influence of its own weight is likely to fall out sooner or later.
By the way, the growth of cracks on the facade allows you to monitor special beacons. In the simplest case, a little cement mortar is prepared and put on the wall in some places so that it overlaps the gap. If these beacons crack, it means that the crack continues to increase, if not, its growth has stopped and then it should simply be filled with a solution.