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Installing a cat flap on your door is a relatively easy process. However, you will need to know a few things before getting started. You can install Upvc panels that have a cat door without cutting a hole into your door or wall. Many glass companies offer them with holes that is already designed for the purpose of a pet-door. 1. Safety The upvc cat flaps can be easily erected and installed to different doors. They are energy efficient and weatherproof and come with a built-in draft excluder which helps to seal the ope