We have built a detached garage with a loft over it. The garage and loft will be heated, but the garage part will be a lot colder. I am going to insulate the ceiling of the garage with bats between the floor trusses - they are 16" high open web type. The loft floor is 3/4" OSB.
Can I put 6 mil vapor barrier on top of the OSB, and then install a floating floor? Would it be better to paint the OSB with one of those vapor barrier paints?
I would have liked to use spray foam between the trusses instead, but it is too expensive for me.