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How to Repair a Composite Door While composite doors are highly durable, they do occasionally have issues. Fortunately, the majority of the time these can be easily fixed by performing simple maintenance and regular inspections. It's typically enough to tighten the hinges, or install longer screws to secure them back in place. Make sure you flush the drainage holes regularly. Draughts Composite doors are energy-efficient, provide high levels of security, and may develop draughts