How to Repair Bifold Door Top Roller Guide If your bifold doors are squeaking, they probably need a little maintenance. They may need to be cleaned or lubricated, or even adjusted. The issue could be caused by loose bolts on the top pivot or by the top guide roller. This https://bifolddoorreplacement01902.blog4youth.com/31273147/ask-me-anything-ten-responses-to-your-questions-about-bi-fold-door-repairs