How to Repair Bifold Door Top Roller Guide If your bifold door is sticking it's likely they require some maintenance. It is possible that you need to clean, lubricate or adjust them. The issue could be caused by a loose screw on the top pivot or the top guide roller. https://bi-fold-door-repair-near32652.blogerus.com/53194817/what-is-bi-fold-door-repairs-heck-is-bi-fold-door-repairs