Necessary to fully insulate deep overhangs?

I’m in southern Idaho, zone 5, “cold” region. The house I’m building has 3.5′ overhangs on the south side. It will have an exposed plank and beam roof with a… I’m in southern Idaho, zone 5, “cold” region. The house I’m building has 3.5′ overhangs on the south side. It will have an exposed plank and beam roof with a…Read MoreGreenBuildingAdvisor