Bifold Door Repair - How to Fix a Sticky Bifold Door If your bifold doors sag instead of smoothly opening and close, the issue is usually fixable by a few easy steps. Here's how. Carpeting or a flooring material change frequently results in bifold closet doors to scratch the floor. https://bifold-door-seal-replacem35998.bloguetechno.com/say-yes-to-these-5-bi-fold-door-repair-tips-65788150