I need a little guidance here.  I’m converting an attached 2-car garage into a family room.  The garage floor had sunk and cracked in places, so I framed up 2×6 stud floor a couple of inches above it.  The question I have is before I put down insulation between the joists and the plywood sheathing, what can I do to ensure no moisture and mold build up and future rotting in the small space below the floor?  There is no vapor barrier below the concrete, and there are no foundation vents.  I appreciate any guidance you can give me.