I had the same problem last winter on a mobile suites. I turned perpendicular to a strong wind, 5 miles later I noticed insulation blowing behind me in the mirror. Thought the whole end cap fell off. Wind had torn the front cover and it folded down and was dragging under the 5vr. Lost about 6' of batting, but amazingly, the plastic did not seem damaged. I folded it back into position, put in some sheetmetal screws and made it home. I then replaced the insulation, and used mobile home strapping, placing a screw about every 12" from side to side parallel with the cross framing. This replaced the 1" washers placed every 2 ' that the factory used! So far so good