How to Repair Bifold Door Top Roller Guide If your bifold door is sticking, it's likely that they need some attention. They might need to be cleaned and lubricated or adjusted. The issue could be caused by an unfastened screw on the top pivot or by the top roller guide. https://repairing-bifold-doors52594.webdesign96.com/31219114/undeniable-proof-that-you-need-bi-fold-door-repairs