How to Repair Bifold Door Top Roller Guide If your bifold doors are squeaking and squeaking, they may need a little maintenance. They could need to be cleaned and lubricated or adjusted. The issue could be caused by loose bolts on the top pivot, or by the top guide roller. https://bifold-door-replacement09841.ourcodeblog.com/30643765/this-is-the-ultimate-cheat-sheet-on-bi-fold-door-repairs