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Installing a cat flap your door is a relatively simple process. However, you will require some things prior to starting. Upvc door panels with a cat flap can be fitted without having to cut holes in your wall or door. Many glass companies offer them with holes already made to fit a pet-door. 1. Safety The cat flaps made from upvc are easy to install and fitted to a variety of different doors. They are energy efficient and weatherproof and come with an integrated draft excluder that helps to insulate the opening. They are also fire-resistant and can