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Composite door cat flaps are a popular choice for homeowners. They provide secure entry for your pet. It also reduces the risk that unwanted creatures will get into your home. However, adding a cat flap to your composite door requires knowledge and understanding of the door's structure. Any structural changes can weaken its integrity, and affect its thermal performance. Add a cat flap on a composite door A cat flap allows your pet to come and go in and out of the home with