A strong foundation is required to be wider than the base of the fireplace stove is not less than 5 centimeters from all these sides. The outer sides are made by an ordinary shaft as an ordinary wall, in half a brick, scrupulously cementing the seams. Small ordinary stones, brick fights are thrown inside this ordinary shaft well and, in addition, poured with concrete solution. A massive foundation should end on 2 rows of ordinary stones lower than the general floor level. Immediately before the upper nearby factory brick block, moisture insulation is installed that protects the furnace from humidity. It is unacceptable to combine a strong foundation of the stove with the main strong foundation of the house. The smallest distance between them must be kept in the region of five centimeters, the clearance can also be filled with fine -grained sand.