Awing slack
Hi Guy's n Gal's:
You were reading my mind, I always wondered this same thing, I haven't had any trouble YET. But my last 5ver's were saggy.
I like the one's I see advertised in Trailer Life, they have a pop up feature that makes a ridge in the middle. like your house roof, water runs right off.
Maybe Heartland can change to that brand, which I can't remember at this time.