The actual source of water leaking in can be very difficult to determine sometimes because water will travel from the source to the actual point where you see it appear. I've spent many hours trying to eliminate leaks
in our Uhaul
. Still not done but I'm making progress. Greg, do you have the old style square corner windows
, or the newer round corner type. Are there any drain holes that could be plugged. We have a new Scamp
jalousie window in the side of our Uhaul
, and after I removed the foam tape that Scamp
sent with the window and reinstalled it with butyl tape there was no more leak. You may have to use a hose to run water on the trailer, start low, work your way up until the leak appears. I've even had leaks
through tiny flaws or chips in the fiberglass. Just this past weekend I discovered that what I thought was a leak around the window turned out to be a flaw in the fiberglass seam.