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Bifold Door Repairs Interior bifold doors are flexible and can be used to connect different areas of your home. They can become damaged and need to be repaired at times. If your bifold doors are letting in draughts, or rattling in the wind, it's a sign that your seals have started to deteriorate. This is a natural occurrence. Hinges The hinges on your bifold door are crucial to how smoothly it opens or closes. If they're bent or damaged the doors could be blocked or stop closing completely. If this happens, yo