To build a chimney pipe it is essential to use a high-grade brick and well prepared mortar (2 parts of cement, 1 part of lime solution and 5 parts of sand) for a laying.
Brick work should be done with densely filled seams and good bandaging that the chimney will absolutely tight.
It is forbidden to use broken brick fragments.
In internal space are not allowed both convex seams and surpluses of a mortar.
In “irresponsible” places where the exit of gases done as thin as possible, then to cover with hydro protective colorless paint which considerably extends stucco life.