The factory floor is plywood sandwiched between fiberglass. I see the opinion of many here is that the floor only goes bad from the top down, and that makes plenty of sense to me. But if that is the case, why would the manufacturer have bothered with the trouble and expense of fiberglassing the bottom of the floor?
My main reason for asking is if I wind up replacing our floor is there anything you do to the new floor besides maybe a coat of paint
to protect from road spray?