How to Repair Bifold Door Top Roller Guide If your bifold doors are sticking, they probably require some maintenance. You may have to clean and lubricate them or adjust them. The problem may be caused by an unfastened screw on the top pivot or the top guide roller. This kit https://bifolddoorrepair55833.theisblog.com/30703399/10-mistaken-answers-to-common-bi-fold-door-repairs-questions-do-you-know-the-right-ones