[kach22i]

Just think of all the money you saved on hiring an architect.

A five minute sketch by yourself would have saved a lot of grief.

Tip, it is preferable that new construction not be made flush with existing/old construction. New walls are typically set back 6-inches or so (maybe even a foot), you don't want to be securing/sealing to a veneer anyway (lateral support).

Main reason for the off-set is old walls are not always plumb, and no builder wants to build crooked walls if he can help it.

Don't you guys have an energy code out there which includes thermal breaks? Lots of specialty items and details are changing tradition out this way in freeze thaw land. Ohio isn't that far from Michigan, we share a border don't we?