no leaks here on our '16 class a. my biggest objection to frameless windows is reduced fresh air. we have crank out "flipper" windows which don't permit as much air flow as slider windows but they generally can be left open during gentle rains.
Rich
Ham Radio, Sport Pilot, Retired 9-1-1 Call Center Administrator
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2016 Itasca Suncruiser 38Q
'46 Willys CJ2A
'23 Jeep Wrangler JL
'10 Jeep Liberty KK
& MaggieThe Wonder Beagle