More spray foam: maximum rafter cavity fill vs underfill and covering the rafters

I live in Nashville, TN, CZ 4. We built an unvented unconditioned attic with complex geometry and three cathedral ceilings! So we are stuck with foam. The quotes we have… I live in Nashville, TN, CZ 4. We built an unvented unconditioned attic with complex geometry and three cathedral ceilings! So we are stuck with foam. The quotes we have…Read MoreGreenBuildingAdvisor