Least five centimeters

A more reliable and at the same time economical option, for the construction of the porch is the use of a trimming board, five centimeters thick. If, we talked about savings, it is advisable to say that for the manufacture of support, we can not necessarily use a wooden beam, but simply sew two boards, the thickness of which will be at least five centimeters. According to the rules, support should rest against the foundation, but you can go to the other, more economical way.