Unvented Roof. Can I 100% of insulation above the roof?

I am building a new home with all cathedral ceilings and will have a well vented attic space to mitigate moisture and circulate air. I would like  100 % of… I am building a new home with all cathedral ceilings and will have a well vented attic space to mitigate moisture and circulate air. I would like  100 % of…Read MoreGreenBuildingAdvisor