If you have slide toppers, it is likely the anti-furling devices at work. look at the slide topper. you will see a small arm about 2 inches long at the roller. if the wind tries to unfurl the topper, the arm will hit the wall preventing the topper ...
If you have slide toppers, it is likely the anti-furling devices at work. look at the slide topper. you will see a small arm about 2 inches long at the roller. if the wind tries to unfurl the topper, the arm will hit the wall preventing the topper ...