How to Repair Bifold Door Top Roller Guide If your bifold doors are squeaking to the wall, they might need a little maintenance. They could require cleaning and lubricated or adjusted. The issue could be caused by an unfastened bolt on the top pivot or by the top guide roller. https://repairing-bifold-doors65865.kylieblog.com/31198710/what-s-the-current-job-market-for-bi-fold-door-repairs-professionals