https://lovewiki.faith/wiki/It....s_Time_To_Forget_Bif
Repairing the Bottom of a Bifold Door They are a great way to reduce space, but they can be a pain when they begin to sag and scrape the floor. These issues can be easily solved by making a few minor adjustments. If your bifold door is rubbing against the floor, it's most likely due to a broken track or a worn roller. The solution is to replace the damaged rollers. Bottom pivot Over time, a bifolding door's bottom pivot may loosen or even fall off. This can be due to a damaged or d