This has been surprisingly durable, holding up well in a couple of very strong storms & high wind. We used ball ties to attach the roof material. Bonus of it being slightly impermeable is that we can also use the leaf blower from the underside to keep the upper surface clear of leaves & debris.
Absolutely love this gazebo. It looks great. Ours came with some damage (dents in the metal) and most people wouldve sent it back... but, we could overlook it. Im assuming it was probably a return already. Anyway, it went up easy and looks great over our wooden deck.