Flooring over a deck
I am refinishing an addition on my house that was made by the previous owners. Essentially, it is the deck off the back porch, which has been walled in to be a sort of mudroom. As such, it is not built on the house's foundation. From underneath, it is simply a deck, with 2x6 decking. So far, I have laid 3/4 in plywood on top of that. I would eventually like to finish the floor in bamboo as part of a conversion to a studio for my wife.
Question #1: What do I have to put on top of the ply before laying the bamboo, in order to avoid moisture problems?
Question #2: I want to have the floor insulated. The previous job, which needs to be redone, essentially involved fiberglass insulation installed from below, and then thin ply attached under the deck to create kind of a box for a floor with insulation sandwiched in between the plywood and the decking. Is this my best option?
Any advice would surely help!