Construction begins to create a project of a bath of foam blocks, in which they take into account the norm of useful area per person, which should be at least 5 m. It is also necessary to follow some rules. One of which is to lay the foundation to a depth of at least 0.5 m. During the construction of the foundation, you should not forget about the waterproofing and erection of the blind area from the outer sides. The height of the walls of the bath should be more than 2 m, and the attic should be well ventilated. The doors must be installed in such a way that the gap that protects the door from jamming when swelling is formed. In this case, the width of the door should be 60-70 cm, and the height-160-170 cm, which prevents excessive heat loss. The threshold is made 20 cm higher than the floor level.