I've seen plenty of examples of people adding thin (<1") sheets of XPS on the outside of the exterior OSB sheeting for additional insulation (outsulation?) Any issues with adding 1/2" XPS to the outside of the studded wall, then applying the OSB sheeting over over that? Issues with the OSB rotting? Seems like it would be similar to "flashing" the sheeting from the inside with spray foam before adding FG/cellulose, only maybe even a little better because it would provide a break between the OSB and the studs. Thoughts/input?