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How to Repair a Composite Door Composite doors are extremely durable, but they are susceptible to problems. Luckily, most times, these issues can be fixed easily by performing simple maintenance and routine checks. Most of the time, all you need to do is to tighten or put longer screws on the hinges to help them to lift back into position. Make sure you flush the drainage holes periodically. Draughts Composite doors are energy efficient, offer high levels of security