How to Repair Bifold Door Top Roller Guide If your bifold door is squeaking, it's likely that they need some attention. They may require cleaning or lubricated, or even adjusted. The problem could be caused by loose bolts on the top pivot, or by the top guide roller. This kit https://bifold-door-replacement09841.ourcodeblog.com/30643765/this-is-the-ultimate-cheat-sheet-on-bi-fold-door-repairs