How to Repair Bifold Door Top Roller Guide If your bifold door is sticking, it's likely that they require some maintenance. You may have to clean, lubricate or adjust them. The problem may be caused by a loose screw on the top pivot or the top guide roller. This kit https://bi-folddoorrepair05312.blog5star.com/31111346/the-reasons-to-focus-on-improving-bi-fold-door-repairs