How to Repair Bifold Door Top Roller Guide If your bifold door is squeaking it's likely they need some maintenance. They might 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://repairingbifolddoors79804.ziblogs.com/30590599/the-10-most-scariest-things-about-bi-fold-door-repairs