have the scaffold in place.
this is the side that will go toward the window. the notches in the bottom board will fit over the cedar batts on the siding.
I did not use any plywood. I edge glued all the oak boards to make the panel..
I did not want the panel to be attached to any part of the window, so it is wide enough to clear the casing..
I built it far enough out so that I can leave the AC in place year round . I can shut the window and I am ready for winter.. no more wrapping the AC with insulation and plastic..
finished outside view.
inside view..