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Old 08-14-2019, 08:24 PM   #1
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1976 27' Overlander
Naples , Florida
Join Date: Aug 2019
Posts: 2
Canít figure out leak source

76 Overlander has a leak in the rear side window. I re-caulked just about everything in the rear portion of the roof and the window but canít seem to locate the source. Your help is appreciated!
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Old 08-14-2019, 08:41 PM   #2
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2020 30í Globetrotter
2014 23' International
Dadeville , Alabama
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What about between the glass and the window frame.
Here is a blog post that might help.
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Old 08-15-2019, 06:26 AM   #3
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1976 27' Overlander
Naples , Florida
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Thanks but I have already ruled out that potential source. I can see the Leak coming from above the inside portion off the window frame.
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Old 08-15-2019, 08:16 AM   #4
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1972 31' Sovereign
Lexington , Minnesota
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Go higher than the window. Leaking water can travel distances laterally to find an outlet.

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Old 08-15-2019, 08:39 AM   #5
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1981 31' Excella II
New Market , Alabama
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Remove inner skins and sit out there and watch where it comes from. Awning brackets, tail lights, seams in window frames etc. The biggest leak at the back of trailers is the plate going under the back of the trailer on top of the bumper. Most trailers frames your age rot completely away from this leak.

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Old 08-15-2019, 08:53 AM   #6
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1986 25' Sovereign
2008 F350, 6.4L diesel , Oak Harbor, WA
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How about lowering the front of the trailer?

I put an ultrasonic generator between the skin and outside by cutting a 2" wide U shaped slit in my closet. Then used the receiver to spot the leak. But you would need that equipment.

Other folks setup a positive pressure inside the trailer then spray soap bubbles till they find the leak.
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Old 08-15-2019, 05:00 PM   #7
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Knoxville , TN
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suction cup all the rivets on the rear cap. If the suction cup will not seal you have a loose rivet. From there you have the options of trying to seal the rivet with something like Captain Tolley's Creeping Crack Cure or pull off the inside cap and reset the rivet.
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Old 08-15-2019, 06:09 PM   #8
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1998 36' Land Yacht Widebody
Reidsville , Georgia
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Check the rubber gasket on the exterior of the slide window around the edges.

My driver slide window leaked and water would fill up the window track. I thought the weep holes were clogged. Turned out my rubber gasket had shrunk in the sun with age. Quick fix was to fill in the gap with silocone but hope to find the rubber replacement at the RV Show in Hershey next month.
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Old 08-17-2019, 10:31 AM   #9
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1970 27' Overlander
West Salem , Ohio
Join Date: Sep 2017
Posts: 94
Hi. Having the same issue on our 70. As I was cleaning out the outside frame and area between the hinges, frame and shell, I noticed that there is slight minimal separation between everything that is sandwiched together. I know when putting the frame in against the shell, butyl tape was used. Then it was riveted into place. The butyl tape gets brittle on the exterior with age and weather. I'm thinking this is where our leaks are coming from..
So, I scraped, wire brushed, scraped, cleaned off and sealed the separation with lexel sealant.... Hoping for a good rain later today so I can sit and see if it worked. This lexel has worked wonders everywhere we've used it with proper prepping and application... I'll post back later...
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