How to Repair Bifold Door Top Roller Guide If your bifold door is sticking it's likely they require some maintenance. You may need to clean and lubricate them or adjust them. The issue could be caused by a loose bolt on the top pivot or by the top guide roller. https://bi-folding-door-repair-ne48832.ezblogz.com/62350839/15-current-trends-to-watch-for-bi-fold-door-repairs