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Old 08-25-2019, 09:30 AM   #1
arniez
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Bulge

I have a small bulge in the bottom right rear panel of my 2015 Passport. No other bulges are present anywhere else on the trailer. I'm hoping it's not delamination. Any ideas would be appreciated.
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Old 08-25-2019, 09:41 AM   #2
JRTJH
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A couple of photos of this "bulge" would help define what you're describing. From your post, it could be anything from a 1" bump to a 3' buckle of the underlying aluminum frame. Help us help you by posting some photos of your issue.
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Old 08-25-2019, 11:04 AM   #3
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Bulge photos

Here are some photos of the bugle.

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Old 08-25-2019, 11:22 AM   #4
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I don't believe your trailer has a laminated rear wall. The Filon is usually just hung on and held in place with the window and anything else mounted on the back wall. It looks like "oil canning". Has the trailer been out in extreme heat/cold?
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Old 08-25-2019, 11:36 AM   #5
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It has not been in either extreme hot or cold, but, the way it's stored on the side of my house gets a lot of direct sunlight on the trailer back.
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Old 08-25-2019, 04:07 PM   #6
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I think Joe has nailed the problem. It's "oil-canning" which is far worse in aluminum trailers than in fiberglass trailers, but still occurs regularly.

Your rear wall is a "floating wall, hung from the top molding, secured on the sides and bottom by the aluminum molding and the only fastening through the middle is where windows, vents, lights, ladders, etc are screwed "through the FILON and into the frame". Otherwise, the rear wall "just floats there". As the sun heats the rear fiberglass sheet, it expands a bit and that expansion has nowhere to go except to "bulge".

Mine looks very similar and I'd suspect that if you go walking around the back of most trailers, you'll find that they all (for the most part) have some degree of "oil-canning"....

Nothing to worry about, just keep an eye on the edges of the rear wall and make sure that it hasn't slipped out from under the molding. Slipping out from under the molding is not common, only occurs very rarely and nothing you need to "worry about" rather just "be aware of the possibility".... It may happen to one in a thousand, so unless you're that statistical selected one, you'll never see a problem with rear wall separation.

Keep camping, enjoy your trailer and I'd suspect that when the weather cools a bit, the "bulge will diminish in size"....
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Old 08-25-2019, 05:23 PM   #7
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Quote:
Originally Posted by JRTJH View Post
I'd suspect that when the weather cools a bit, the "bulge will diminish in size"....
Ain't that the truth!
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Old 08-26-2019, 07:19 AM   #8
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I want to thank everyone who responded. I am greatly relieved. I knew if I asked this forum, I would get the answers I needed.
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