Sheathing repair on unvented cathedral ceiling with closed cell spray foam

Minnesota, zone 6.I have a house with a 17 year old roof that needs replacement. The roof is an unvented cathedral ceiling with closed cell spray foam applied directly to… Minnesota, zone 6.I have a house with a 17 year old roof that needs replacement. The roof is an unvented cathedral ceiling with closed cell spray foam applied directly to…Read MoreGreenBuildingAdvisor