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How to Repair a Composite Door Composite doors are renowned for being durable, but they can be damaged over time. Most issues can be fixed easily and do not require expert assistance. A poorly fitted frame could cause a squeak when you open and close your door made of composite. Wood filler is a solution to solve this issue quickly. Weatherstripping Composite doors are designed to be sturdy and durable, but that does not mean they won't suffer damage. Fortunately, a lot of these issues are easy to repair