I was talking about the ones sold at lowes. unfortunately they don't sell any of the good solar roofing around hereI think it depends on what type of plastic roofing material you're talking about. Fiberglass has a tendency to break, then there's PVC, which is opaque or transparent, but not clear. You can get polycarbonate SunTuf roofing that can stand up to very large hail and strong winds. 8' sheets of polycarbonate roofing are under $30 at my local hardware store and have the benefit of transmitting light.