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Old 05-26-2012, 04:41 AM   #2
SteveC7010
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Join Date: Sep 2011
Location: Northville NY in the Adirondacks
Posts: 2,128
The are probably stress cracks caused by flexing of the trailer.

At the end of the crack, drill a small hole - 1/8" is plenty - that will stop the crack from growing. Then get some good white vinyl tape and cover it to keep water out.

I had stress cracks above the forward door of our '99 Sunline. Drilled 'em, taped 'em, and enjoyed another 9 years with the trailer.
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