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Installing a cat flap your door is a relatively easy process. You will need to be aware of a few points prior to getting started. Upvc door panels that have a cat flap can be fitted without having to cut holes in your door or wall. Many glass companies offer them with a hole already made for a pet-door. 1. Safety The cat flaps made from upvc can be easily installed and installed to different doors. They are energy efficient and weatherpro