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Cat flaps let your pet come in and out as they please without you needing to open a gate or window. They are available in a variety materials and can be installed in doors, windows and even walls. A professional tradesman can install a cat flap in any kind of door, including composite, wood, and uPVC. Installation Costs The cost of installing a cat flap could differ significantly based on the dimensions, the kind and complexity of the job. The door or wall material will also affect the labor cost. Installation into the Fr