The foundation should completely harden, and this happens no earlier than one month after its laying, but the base can be freely laid in one week. A house built of gas blocks or bricks can also have a base of two or three rows, but a building of sand blocks or slag blocks should have at least four or six rows. In addition, the bottom of the basement should be securely isolated from the foundation. So after installing the basement, you need to put a fairly thick layer of waterproofing. But do the wall laying itself only a month after the foundation was filled. For all the complexity of construction, the roof of such a building can be any, since it does not affect the stability of the structure.
