How to Repair Bifold Door Top Roller Guide If your bifold doors are sticking then it's likely that they need some maintenance. They could need to be cleaned, lubricated or adjusted. The issue could be caused by loose bolts on the top pivot or by the top guide roller. This https://bifold-door-replacement50767.blogs100.com/30964647/what-the-heck-what-exactly-is-bi-fold-door-repairs