Rain on slide toppers

dougrainer wrote:

tropical36 wrote:
All keep in mind that slide toppers are not designed to keep water from accumulating on top of the slide itself, but only to keep debris off of them.
I think slid room roofs should have a slight hump in the middle as part of their design, so that water can drain off either end. Contrary to my design beliefs, it seems that many actually have a dip in the middle for pooling and holding water. Not only that, but to the point of retaining it and even with the slide being retracted and going past the top seals. Just don't get it and never gave it much thought before, since our old tropical has never done that..

1. Having a hump is NOT practical. How would you get the room in and out of the wall cut out and SEAL correctly if the roof was not flat???????
2. The DIP in a roof is caused by age and the partial collapse of the slide room roof structure. But, this is NOT common, when they build a slide room box, they have to make the roof as thin as possible for the interior ceiling height when you are in the slide room box. They cannot make a reinforced roof like they can on the main roof of the motorhome. Doug

I feel if it can stand a dip in it, then it can stand a slight hump as it's doubtful any of them are completely flat. Now how is it that when the slide comes in, it brings the water with it inside, rather than be expelled by the top seal? Doesn't spill a drop either, until you retract the jacks and then it's holy Niagara!
Also, it seems that these particular American coaches, all have this problem and they will even admit to this, including the new ones. Just wasn't used to something like this, as our old Tropical never collected water on top, ever. Then again, when we considered it level (using the bathroom door), it's possible that the slide top wasn't.