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Cat flaps offer the convenience of allowing your pet to come and go whenever they want without needing to open the door or window for them. They are available in various materials and can be incorporated into doors, windows and walls. A skilled tradesman can put in a cat flap for any door, including composite, wood, and uPVC. Installation Costs The cost of installing a cat flap varies greatly according to the type, size and complexity of the project. The door or wall material can also impact the labor cost. I