At first glance, they are considered monolithic, but the fact is that they have a lot of cracks and a micropor through which moisture seeps. This happens with rain or raw weather. Loaning sutures of masonry. Water can freely penetrate through the seams inside the house if the masonry seams do not satisfy moisture resistance indicators. And in winter, freezes and make promoons inside the seams. The foundation is the most important part during construction, everything begins with it. The essence of the problem arises in the foundation itself during isolation from humidity. Water gets inside through the same micropores and cracks, rises up, as a result — mold.