I have thought of this also, and have come up with a solution. I used this house wrap called cellutex, all of you have seen it before, framers use it to help insulate new homes before the siding is applied. I got some at the building supply store, it is really strong, and is a real tight weave plastic. I use a 1"x2" piece of wood and roll the ends of it a bit then nail or screw it onto the run frame, this gets it nice and tight and with no wrinkles in it. this also cut's down on the billowing when the wind blows. The only drawback is it has bright blue writing on it looks kinda funky, but works great.
AL