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Cat flaps let your pet come in and out at their own pace, without needing to open a door or window. They come in a variety materials and can be fitted in doors, windows and even walls. A professional tradesman can install a cat flap for any kind of door, including wood, composite, and uPVC. Installation Costs The cost of installing a cat flap varies greatly according to the size, type and complexity of the project. The material of the wall or door will also affect the labor cost. Installation into the French glass door, for instance is more expensiv