https://www.openlearning.com/u..../meiermcleod-smj6qe/
https://mclean-quinn-2.federat....edjournals.com/16-mu
Repairing the Bottom of a Bifold Door They are a great way to save space, but can be frustrating when they begin to sag and scrape the floor. These issues can be easily fixed by making a few small adjustments. If your bifold door is rubbing against the floor, it's probably due to a damaged track or roller that is worn out. The damaged rollers must be replaced