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Bi Folding Door Repair Tips Bi-fold doors let you fully open up the space and connect indoors to outdoors. They're ideal to let in sunlight and fresh air, however it's essential to maintain them properly in order to avoid damage. There are several common problems that you may have to deal with when using your bi folding door. Luckily they're usually easy to fix! Cracked Pivot Pins You may have noticed that your bi-folding doors are scratching on the bottom, especially if you've ad