Here's a pic of what happens when it gets a touch breezy, and the tarp is not fully tied down tightly along the edge of the roof.
It wasn't much of a breeze, and as you can see, the only portion that is not tightly strapped, is the center over the door. It doesn't take a lot of wind to blow things out of place, when they are not glued down.
That's why roofing needs to be glued in place. 60 mph driving down the road, especially into a head wind, would be rough on any membrane roof if not secured properly.
Fortunately, this one is only temporary.
