Double Stud Wall or 6″ Stud Wall with Insulated Zip Sheathing w/ 2″ Rigid insulation?

I am designing a house for northern Vermont Climate Zone 6 and am trying to decide between two different wall options:1) Double 2×4 stud wall (11 1/2″ cavity) with rain… I am designing a house for northern Vermont Climate Zone 6 and am trying to decide between two different wall options:1) Double 2×4 stud wall (11 1/2″ cavity) with rain…Read MoreGreenBuildingAdvisor