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Installing a cat-flap on your home is a simple process. You'll need to be aware of a few issues before beginning. upvc door panels with an opening for cats can be fitted without having to cut holes in your door or wall. Many glass suppliers offer them with a hole that is already designed for the purpose of a pet-door. 1. Safety Upvc door panels cat flaps are easy to install and can be fitted to many different kinds of doors. They are energy efficient and weatherproof, and they have a built-in draft excluder which assis