How to Repair Bifold Door Top Roller Guide If your bifold doors are sticking and squeaking, they may need a little maintenance. They might need to be cleaned, lubricated or adjusted. The problem could be caused by an unfastened bolt at the top pivot or by the top guide roller. https://replace-bifold-doors91405.dgbloggers.com/30888721/what-s-the-current-job-market-for-bi-fold-door-repairs-professionals-like