Air gap between cathedral roof insulation and inner wall

Hello, thanks for entertaining my question. I need to obtain r-38 in my cathedral ceiling (really an A-frame), and the rafters are 11 1/4 deep. There will be 2″ of… Hello, thanks for entertaining my question. I need to obtain r-38 in my cathedral ceiling (really an A-frame), and the rafters are 11 1/4 deep. There will be 2″ of…Read MoreGreenBuildingAdvisor