I'm not sure what you are asking. The rear ramp door on my Coleman Trailblazer 26TH does not leak when closed. When open with the patio rails, the "canvas Velcro "door" will not keep rain out. One time during a sudden down poor, we quickly disassembled the patio, close the ramp door and the water drained off the ramp door into the camper. Not much to mop up, but don't like any water in the camper. So, if we suspect rain when leaving camp site, the patio is secured inside and ramp door closed.
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