Unvented Attic Insulation Options

Hello. What is the best non toxic options for insulating the attic roof deck for a non vented attic? I know the codes required an impermeable layer with a vapor barrier… Hello. What is the best non toxic options for insulating the attic roof deck for a non vented attic? I know the codes required an impermeable layer with a vapor barrier…Read MoreGreenBuildingAdvisor