How to Repair Bifold Door Top Roller Guide If your bifold doors are sticking it's likely they need some attention. They may require cleaning or lubricated, or even adjusted. The issue could be caused by an unfastened screw on the top pivot or by the top guide roller. This kit https://bifolddoorrepair97017.life3dblog.com/29930999/15-top-bi-fold-door-repairs-bloggers-you-should-follow