I just saw your post on the internet and I am in Minnesota and bought the vinyl to do the same on my front porch I went 2 a guy that does awnings and Marine vinyl for boats. He said with the heat that vinyl will tighten because I said ask him something about using velcro and he said there was a certain way that he would have to do something to the edge is because sewing would just make it rip because of the amount of holes. If you see this I was wondering what you came up with
