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Need help with leak under rear window
I took my 2004 26.5 mid-bath out camping for the first time last Friday and ran into a few problems.  The most serious is that I discovered there had been some past moisture that had left water marks under the cushions of the passenger side couch.  I was hoping that it was from a window that had been left open at some point, as there didn't seem to be any real damage other than the water mark on the bottom of the cushion.  But Friday night it rained and I discovered water running down the inside back wall under the rear window.  It was more than just a few drips - the pillow and bedding that was on the couch got noticeably wet, not just damp.  I actually felt some drops of water on the wall itself, but it wasn't like a stream of water.

So my question is - where should I start with trying to fix the leak(s)?  I have checked the other couch and the storage compartments on both sides and have not found any evidence of water.  The RV was well cared for by the prior owners and a roof inspection by a local RV dealer didn't find any issues about 6 months ago.  The RV was kept in a garage all winter except for periodic short drives in dry weather. 

I have seen other posts suggesting that the weep holes in the windows sometimes get clogged, so I know I should clean those.  Any other thoughts given where the leak appeared - under the stationary rear window, about 18 inches from the side wall?
Thanks for any suggestions!
2004 MB
Re: Need help with leak under rear window
Reply #1 –
The Mid-Bath's rear window is made of three pieces of glass, sealed with rubber moldings. This window configuration has a tendency to leak with age age the rubber hardens and shrinks. It seems the slope of the rear window slow the flow of water draining off it and increases the possibility of leaks, I see many more rear window leaks than any of the other windows.

Fixes for the leak range from resealing the glass and the frame to total replacement, depending on the condition of the moldings.
If you have signs of previous, long term leakage, investigate for rot, it doesn't take long, in the right conditions to do serious damage. Rear wall rot is common .
Twin/Kings and 31' Twin Beds all have the same window and leak potential.

Larry
Larry
2003 23.5' Front Lounge, since new.  Previously 1983 22' Front Lounge.
Tow vehicles  2020 Jeep Wrangler Rubicon, 2001 Jeep Cherokee
Photo Collection: Lazy Daze
Re: Need help with leak under rear window
Reply #3 –
Hi Buckeye2; When I took delivery of my TK in 2000, my first 'real' rainstorm was in Utah. The rear window had a small leak (a few ounces per hour).  I used to use the word stile, but now it has drifted to muntin. That vertical separator between the small window, and the large window, has two little screws at the top, and two at the bottom. I don't have the dual pane windows so my windows may be different than newer ones.   It turns out that the screws had been inserted without sealer. The other one on the passenger side did have sealer. I removed the two at the top of the driver side, and re-installed them with some black, neoprene goo. Bought a small tube at an automotive store. It has been fine since. I could see that all of the other screw pairs were coated, so an assembly error. Probably before it got to Lazy Daze.   The sloping back, as Larry said, makes it easier for rain water to find a way in.     RonB 
RonB (Bostick) living in San Diego
Original owner of "Bluebelle" a '99 TKB
 
Re: Need help with leak under rear window
Reply #4 –
When I had the rear window replaced due to fogging last year on my 2005 mid bath with thick single pane, I Ithought it wa leaking at first. Later determined it was condensation dripping down the window, collecting in the channel of the frame, then overflowing and dripping down the wall in a tiny stream - enough to make the cushion wet on the end.

David g
2005 MB