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How to Repair a Composite Door Composite doors are renowned for their durability, but they are susceptible to being damaged over time. Fortunately that the majority of issues that can arise are easy to fix and don't require expert assistance. An improperly fitted frame may cause a squeak whenever you open and close your composite door. The quickest solution is to use some wood filler. Weatherstripping Composite doors are designed to be strong and durable, but this doesn't mean they will never suffer