The foundation of the bath should be reliable, since the load of the building falls on it. In addition, he must protect the walls from moisture, the source of which is soil. Some requirements are presented to the latter. For example, it is important that it has a bearing ability and uniform compressibility. Also, he should not swell and sag. For the construction of the bath, soil consisting of silt, or peat bog is not suitable. In cases where there is simply no other place for construction, such soil is replaced by a pillow consisting of coarse sand. For these purposes, it is necessary to provide a trench under the foundation and fall asleep into it coarse -grained sand. It is watered with water, and then tamped.