How to Repair Bifold Door Top Roller Guide If your bifold doors are squeaking and squeaking, they may require a little attention. They might need to be cleaned, lubricated or adjusted. The problem could be caused by an unfastened bolt on the top pivot, or by the top guide roller. https://bifoldingdoorrepair67117.jiliblog.com/87708595/ask-me-anything-ten-answers-to-your-questions-about-bi-fold-door-repairs