How to Repair Bifold Door Top Roller Guide If your bifold doors are squeaking and squeaking, they may require a little attention. They could need to be cleaned, lubricated or adjusted. The problem could be caused by a loose bolt at the top pivot or by the top guide roller. https://bifold-door-replacement82987.glifeblog.com/29775293/why-nobody-cares-about-bi-fold-door-repairs