Is it coated on the inside of the door?
Is that coating cracked, or does it look water tight?
Did the manufacture use regular plywood - or Marine Grade (they type they do use) that has water resistant glues?
What about the outside panel of your plywood door? Does it leak water into the door/wall? Since it is outside 24/7, I would worry just as much about that surface leaking in water as the inside surface leaking water to the door.
What about the garage floor? Water tight surface? Or something like a sponge that absorbs water?
I think that you do not think the development team ever camped with your RV in the rain before building it, or think about people who are out in the rain loading quads, motorcycles, and others?
I think it should be fine.
Fred.
Money can't buy happiness but somehow it's more comfortable to cry in a
Porsche or Country Coach!
If there's a WILL, I want to be in it!
I havn't been everywhere, but it's on my list.
Kangen.com Alkaline waterEscapees.com