Quote Originally Posted by thomasf View Post
The only problem is, if you look at your roof in section, one of the pitches is plating correctly, from the inside face of the stud wall (see section 2), but the other pitch is not. But, I just remembered the math and it is very simple actually. The overhang is the run (12") divided by the rise (x) times 12 = overhang in inches.

so for a 12:12 pitch it's 12/12 = 1 x 12 = 12"

7:12 would be 12/7 = 1.714285714285714 x 12 = 20.57142857142857"

this is from outside face of stud, not face of finish material. So, i'm going to try using this overhang measurement & see if it works.
That's what I'm saying, if you want aligned eaves, either one set of rafters will have to have larger bird's mouth cuts, or the other set of walls will have to be slightly taller or have additional blocking above the wall top plate. That's the only way, geometrically, to get aligned roof eaves.

When I say aligned roof eaves, I'm referring to the UPPER point of the eave, i.e. where the gutter attaches.