They make several kinds, make sure that the roofing is well connected to the trusses, I was at a show and the lady next to me had a cheap one and the roofing blew up like a parachute and whipped off the shelter, all she had left was the frame, I poured cement into 4 1 gallon coffee cans made rings in top and secure my legs the roof won't fly off but then the whole shelter will blow away! good luck woodman