I noticed water under the very bottom black trim every time it rained, and was concerned about water wicking up to the hidden wood reinforcement and rotting it similar to the way others have documented. You had to look pretty close to see the water but sticking a slip of paper in behind the trim would also reveal it.
I also had some of the trim near the handle come loose in the hot sun. Kent Eveland at Scamp
told me the trim was held on by friction (except where it was riveted) but that I could use adhesive also where it came loose so I did that. He thought his would stop the water but it did not. Next, I used ProRV sealant on the entire trim on the door exterior
. It made no difference, water would still be present after a rain. So I next used the sealant on the interior
of the door, along the trim up to the top of rubber strip at the door bottom.
I have not seen any water since HOWEVER
(and this is important), I am not recommending this action because it is very possible that water is still getting into the bottom of the trim but now I have masked the problem and made it harder for it to dry out. I just don't know if it is better this way or not - time will tell.