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 with some easy steps. Here's how. Bifold closet doors may scrape the flooring when carpet is laid or the flooring material is changed. https://replace-bifold-doors59219.ttblogs.com/10266858/why-is-there-all-this-fuss-about-bi-fold-door-repair