Is this a good wall?
Can I use taped 1-2″ exterior XPS as my sheathing and drainage plane (with no OSB sheathing, racking taken care of with other bracing methods) and full cavity high density spray foam (2×6)?
In zone 6/7 where I am (cold) my exterior sheathing should be very thick (3″+) assuming OSB sheathing to avoid condensation issues on the interior surface of the OSB. BUT if the OSB is left off as planned and the spray foam and XPS essentially become one unit (really 6 or 7″ of total foam) am I OK on the condensation issue?
GBA Detail Library
A collection of one thousand construction details organized by climate and house part