FireMedic82
DIYer
On my last trailer I put a sheet of sheet metal on the bottom of the floor and sealed it into angle iron so it had a lip. It will be impossible for water to get through the bottom or do any damage to the plywood.
I really like that idea. Knowing what I know now, if I had of used my noodle and thought about it a little longer, I could have made the galvanized sheet bigger by 4 inches all the way around and bent it over the wooden floor and floor framing. That would have been super easy and added quite a bit more protection. Between the resin coating and trim along the bottom though, it should be just fine(fingers crossed). I'll just add that one to the memory bank for next go around