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Old 10-23-2020, 05:52 PM   #1
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Tracing a leak

I have a 2014 Rockwood 8280WS Fifth Wheel. I've lived and traveled in it for almost 7 years. I've never had a leak but am tracing one down now. The leak is at my rear window. It began a couple of months ago during a big storm. The drops are coming from between the window frame and wall. I've caulked along the top hinge of the window as well as along the outside side-edge of the window frame. I've looked on the roof where the rear cap joins the roof and can't see any cracks or openings. I thought the last caulking would solve the problem but today's rain told me "no",,,, while it laughed at me. When the rain stops and the ground dries, I'll check the running lights above the window to see if that may be in entrance point. Also the "weep-holes" are wide open and unobstructed. Has anyone had a leak in this location?

The first picture is of the widow. The blue painters tape is where I caulked the hinge. The second picture is from inside and shows the location of the drips. The drips come from behind the window frame at the lower left screw and runs down the wall. The third picture is of the back of the RV for perspective.

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Old 10-23-2020, 07:09 PM   #2
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I'd definitely recaulk all those marker lights above the window and closely check the corner trim as well. Have you eternabonded the seam between the back cap and the roof membrane?
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Old 10-23-2020, 08:30 PM   #3
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I had a similar leak in my 2007 Rockwood 8315SS. I tried various caulking methods on the outside of the window with no success. I ended up removing the front window and found the butyl tape had been folded under in a corner at the factory. Removed the butyl tape, installed new tape, and re-installed the window. It never leaked again during the 13 years I owned the unit.

John U
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Old 10-29-2020, 07:24 PM   #4
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I assume this unit is parked? If caulking the running lights doesn’t work keep looking outward. Leaks can travel far. I’m betting on the running lights though since they’re above the window. Also check your roof after the next rain or run some water on your roof and see if water is pooling anywhere.
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