Mine didnt actually come off, but I did have to go out and pull it tight again a few times. There were time I looked out and there as about 4 feet of air between the wood and the tarp. I have about 20 gallon plastic milk jugs full of sand tied to my tarps to anchor them down. Along with concrete blocks and big nubbins on the top and edges, I had to throw these back on more times than I cared to.
I am with you monk680 I already have plans for a open ended wood shed that will go up in the early spring. I have had enough with tarps and plastic and all the other fun stuff that goes with them.