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Bi Folding Door Repair Tips Bi-fold doors let you fully open up a space and connect indoors with outdoors. They are perfect to let the sun and fresh air in, however they need to be maintained in a timely manner to avoid damage. There could be a myriad of problems with your bi-folding door. Fortunately, they are easy to fix. Cracked Pivot Pins If you've recently put in carpeting or changed the flooring material in your home, you might notice that your bi folding doors are