Cargo Trailer Door Waterproofing

So I need some advice... I'm getting ready to order the trailer for my project, however I'm having trouble with one part. I'm going to be using a 6x12 with a V nose. I'm doing things a little different (that's pretty standard for me) and want a door in the V nose to use for storage or camping supplies and equipment, kind of like a storage closet. I'll have a build thread soon to explain "why" I'm doing it this way, but for now, I just need help with this small design issue.
So I asked the manufacturer if they'd put the door in the V, and they said sure, BUT they also said that they can almost guarantee it will leak. As you can see from the picture below, I'm going to be putting an RV door on the curb side after I get it (the company won't do it unless I increase the height another 6"), and the standard door is free. I don't want to use the standard door anywhere else, so it's basically use it in the V or just not use it.
Why will this door not be water tight on the front, when it normally would be on the side? Do you think I'd be able to make the door water tight by adding some additional framing and some additional rubber seals? Sort of a double seal arrangement? Or some sort of additional molding to deflect wind driven rain Would an RV door be watertight in that position?
Thanks for any help.
Don
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So I asked the manufacturer if they'd put the door in the V, and they said sure, BUT they also said that they can almost guarantee it will leak. As you can see from the picture below, I'm going to be putting an RV door on the curb side after I get it (the company won't do it unless I increase the height another 6"), and the standard door is free. I don't want to use the standard door anywhere else, so it's basically use it in the V or just not use it.
Why will this door not be water tight on the front, when it normally would be on the side? Do you think I'd be able to make the door water tight by adding some additional framing and some additional rubber seals? Sort of a double seal arrangement? Or some sort of additional molding to deflect wind driven rain Would an RV door be watertight in that position?
Thanks for any help.


Don
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