If you look at the end of the rails that the rollers run on you will see that they do not go all the way to the end, sliders installed by the builder leading out to the lanai are about 1" shy and the ones on our enclosure are about 3/8" shy. These end gaps will allow the water to work it's way back to the inside track if heavy enough rain. The inside bottom frame is higher than the tracks and therefore will not allow it to come into the room, the water will go back out to the outer track and exit through the weep holes.
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