Painting exterior plywood wall sheathing
Addition is concrete block for first floor and 2 x 6 framing with plywood sheathing for second floor. Both stories will be brick faced. Now I understand the concept of a drainage plane: that is if any moisture penetrates the brick (which it will) it will run down the space between the brick facia and either the bock or the tyvek wrapped plywood and out the weep holes the bottom of the brick wall.
The question is: Should both the plywood and the concrete block exterior surfaces be waterproofed before the tyvek is applied. I know that the theory is that tyvek acts like gortex in that it keeps the water out but allows the house to breath. Will painting the plywood put a moisture barrier in the wrong place thus trap moisture (escaping from the home's conditioned space in the winter) in the wall causing possible mold?
Bottom line: Water proof exterior (above grade portion) of block wall?
Water proof exterior plywood wall?
Just tyvek both the bare block (above grade)