How to Repair Bifold Door Top Roller Guide If your bifold door is sticking it's likely they require some maintenance. They might need to be cleaned and lubricated or adjusted. The problem could be caused by a loose bolt on the top pivot or by the top guide roller. This https://bifold-door-glass-replace16898.mybuzzblog.com/10303620/what-do-you-think-heck-what-is-bi-fold-door-repairs