A pretty good garage
In the process of putting up an advanced framed 36 by 36 foot detached garage that will have a “mother in law” apartment upstairs.
Climate zone 6 and planning on using rock wool batts on both the underside of a vented cathedral roof as well as the entire garage.
Trying to avoid using spray foam on both the garage ceiling as well as avoid foam on the roof deck. My question is regarding the air barrier for the apartment – is a practical approach to return the wall sheathing over the top plate of the garage part and then tape the seams of a sheet-goods (plywood, OsB, ZIP) on the garage ceiling?
GBA Detail Library
A collection of one thousand construction details organized by climate and house part