Had a keystone outback with the single slide. Water poured in down the center of the wall. I could never detect where the water was coming in but finally ordered a roll of the white dicor tape. I cleaned the roof next to where the rubber roof went under the edge of the trim. I took the tape lapped it over the joint between the rubber roof and and metal trim and up the side if the metal trim that seals against the trailer side. Sealed the edges of the tape with the dicor caulk and the leak was gone. That was my fix.
SFC (U.S.A. RET.)Billy W. and Molly Stark
Once upon a time L.E.O.
dragging a 2012 Crossroads Cruiser 330SS
with a 2012 KR F-350CC, LWB, PSD, FX4 (whew)!!!!!