https://world-news.wiki/wiki/T....his_Story_Behind_Bif
Bifold Door Repair - How to Fix a Sticky Bifold Door If your bifold doors stick rather than smoothly open and close, the issue can be solved by a few easy steps. Here's how. Adding carpet or a flooring material change frequently causes bifold closet doors to scratch the floor. This can be addressed by raising the door using the bottom pivot adjustment. It is important to maintain the hardware by getting rid of dirt, dust and debris. Versatility Bifold doors can be a great way to improve you