It is the poor design of the placement of the A/C on a flat roof. That is the standard way they install A/C's on all RV's. I modified mine by installing 3/8 ply strips by 2" wide under the roof material and the seal and the A/C on top of that. No more rain or snow melt running in the TT when the seal fails.
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2014 Ram 1500 CrewCab 4x4 5.7 Hemi 3.92 Rear and Air Lift 1000
2005 Jayco Jay Feather LGT - 29Y GVWR-7000 lbs.
Dexter Axle Lift 4-9/16" - installed with sub-frame.
Pro Series 1200 lbs. WDH with Double Sway Bar.
Champion 3100/2800 watt Inverter/Generator-Onboard Solar Power
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