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Old 02-14-2011, 09:36 AM   #1
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Ripple in Skin

Lately I have noticed that when it is warm outside the skin on my motor home seems to have a wripple in it. When it is cold outside ther is no wripple. Does anyone have any ideas?
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Old 02-14-2011, 10:14 AM   #2
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Sounds to me like the skin is detaching from the insulation. When it heats up it swells, then when it cools off it shrinks back. Any water damage in this area? Mabye around a window ?
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Old 02-15-2011, 08:08 AM   #3
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No water damage. No leaks. Everything is fine except the wripples come and go
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Old 02-15-2011, 09:08 AM   #4
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That's interesting because I have the exact opposite problem. Very noticeable bulge, about 18" across +/-, in the sidewall in winter but nothing in the summer. Was worried that it might be delam but it doesn't seem to get any bigger and it's not soft underneath so I don't know what the heck it is. No apparent leaks in mine either.
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Old 02-15-2011, 05:17 PM   #5
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I think what you are seeing is the differential in expansion between the sidewall frame and the fiberglass skin. When the sun is shining on one side of the coach and not the other can you see a difference? I suspect that the low spots are at the frame members and the high in-between.

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