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Old 09-06-2012, 11:24 AM   #1
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What could it beeee?

Not really sure how to describe what it is I'm looking at on the wall beside the passenger seat of my coach, but it's like sharp little pimples that seem to be wanting to come through the wall paper, but haven't. They seem to be hard, as I can't push them down. I can't take a picture of it because the olique angle required wouldn't really show anything. Theres about a dozen or so of these little pimples(?).
Any ideas on what they are, the cause, and rectification?

Thanks,
Stewart
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Old 09-06-2012, 11:37 AM   #2
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Are they below or near a window? On my class C, the window was leaking into the wall and it was the Laun plywood backing expanding, reacting to the water. You may want to pull the window and check the seal and peal back some of the vinyl wall paper and check for water damage.
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Old 09-06-2012, 12:42 PM   #3
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All our problems start with water. erstanfo has the best idea
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Old 09-06-2012, 02:29 PM   #4
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Thanks guys, I'll check it out.
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Old 09-06-2012, 05:56 PM   #5
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Perhaps rivet heads starting to show though?
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Old 09-06-2012, 06:18 PM   #6
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Perhaps rivet heads starting to show though?
Thanks but I don't think so. The pattern is to random and there's far to many in a relatively small area.
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Old 09-06-2012, 07:00 PM   #7
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Before you pull out the window, try checking the weep holes in the frame and be sure they are dumping the rain back outside of the coach.
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Old 09-06-2012, 07:27 PM   #8
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Before you pull out the window, try checking the weep holes in the frame and be sure they are dumping the rain back outside of the coach.
Thanks, yes, that is the first thing I was planning to do. Not sure where I'm going to go from there. Pull the wall paper I guess. This is the fate gods getting back at me, I was too happy that nothing significant had happened to my coach.
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Old 09-06-2012, 08:48 PM   #9
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The little pimples in themselves are not harmful - just adhesive that has swelled up a bit. But they indicate that there is moisture in the wall, so you need to find and fix the source of the moisture to prevent actual damage. At this point, if you can fix the leak externally there would be no need to tear into the wall. Unless, of course, you simply cannot stand knowing the little imperfections are there.
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Old 09-07-2012, 05:14 AM   #10
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The little pimples in themselves are not harmful - just adhesive that has swelled up a bit. But they indicate that there is moisture in the wall, so you need to find and fix the source of the moisture to prevent actual damage. At this point, if you can fix the leak externally there would be no need to tear into the wall. Unless, of course, you simply cannot stand knowing the little imperfections are there.
Very interesting, and encouraging news, thanks for that.
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Old 09-07-2012, 09:35 AM   #11
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I had a similar problem in a 2002 Dolphin LX. Turned out to be a slight leak at the window frame above the area with the pimples. I resealed the window and never had any further problems. The pimples even receded a bit after the wall dried out.

Moisture is never an ok thing, but if you catch it early enough there is no significant damage, e.g. no delamination.
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Old 09-07-2012, 10:25 AM   #12
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I had a similar problem in a 2002 Dolphin LX. Turned out to be a slight leak at the window frame above the area with the pimples. I resealed the window and never had any further problems. The pimples even receded a bit after the wall dried out.

Moisture is never an ok thing, but if you catch it early enough there is no significant damage, e.g. no delamination.
It's good to read that. I think I may be early enough. The walls aren't punky or anything. I'll get a tube of sealant this weekend and go around the whole boat. We will be heading to to the wet season soon, so it would be good to reseal the entire unit anyway.
Thanks very much for your input.
Stewart
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Old 09-07-2012, 10:42 AM   #13
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If you determine it is a leak and fix it, you could probably get rid of the pimples with an iron set at a low temp, so as not to burn the wallpaper.
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Old 09-08-2012, 11:22 AM   #14
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If this problem is indeed moisture intrusion from a leaking window seal, it is fixed by removing the window, cleaning all of the attachment points, and putting new putty tape back and re-attaching the window. You said you were going to buy sealant and that sounded like you were planning on putting this "sealant" on the outside of the window. In my experience, that does not work. Hope this helps.......

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