The perfect protection of old foundations is the implementation of the so-called. hydrophobic lock. Well, special preparations are injected inside the wall, by solidifying, they form blockages in the wall, through which no moisture can penetrate the higher parts of the wall. Hydrophobic preparations are poured into specially drilled holes. When the walls are very wet, the thermo-injection method is more effective, in which the wall is previously dried with special hot air blowers inserted into the holes – the same, into which the liquid is poured.