How to stop slide topper from sagging?

Last RV had toppers this one does not. I will never have another RV with toppers.

Our long topper also collects water.. I usually let it drain off when retracting the slides in , but that makes the side of the trailer wet and sometimes dirty from the water... If I think of it , I go up my ladder with broom in hand before and take a second to sweep the topper.

Wow.....Lots of ideas and I guess I'm not alone.

I have a 19' long by 3' deep slide topper on our TT. I had my dealer tighten it after several camping trips as it did get somewhat loose. It is better but still collects water on one end. If it had been installed at a steeper angle it might have worked perfectly but then you run the risk of wind getting under it when going down the highway and blowing it off where the topper attaches to the TT wall. I also have the center cradle installed as mentioned in a post above.

If it rains and stops and I am not leaving for a day or two or longer I just bring the slide in to drain the water and move it back out. Easier than trying to find a fix or bring more stuff with me.

I think the smaller toppers stay snug for that very reason: they're smaller. The larger toppers would require so much tension to stay taut that it may create too much stress on its attachments.

That's my thought anyway since our large topper does the same as yours with the smaller toppers being just fine. But I'm like Dick_B: "However, when all is said and done I just let it pool and it runs off when I retract the slide. No need to carry any more `stuff' for a sometimes problem."

Ours also collects water. I've tried throwing a rope over the topper and affixing in on each end which tends to form a channel for the water to run off. However, I'm also concerned that this will stretch the cover which creates its own problems.
I really like the idea (mine) of a perforated pvc pipe just slightly longer than the width of the cover. The water flows into the pipe and out the end. See stretching note above.
However, when all is said and done I just let it pool and it runs off when I retract the slide. No need to carry any more `stuff' for a sometimes problem.

If the topper roller tube is bowing, Dometic has a cradle kit which works well-

Does the water come off when you put the slide in? If it works why would you need to fix it?

I have seen some that have made an inverted "T" out of white PVC like a coat hanger used at a clothing store upside down for the lenght of the slide out.

navegator