How to Repair Bifold Door Top Roller Guide If your bifold door is squeaking, it's likely that they need some maintenance. They may need to be cleaned, lubricated or adjusted. The issue could be caused by a loose screw on the top pivot or the top guide roller. This kit https://bi-fold-door-repair36639.targetblogs.com/31219003/why-nobody-cares-about-bi-fold-door-repairs