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Installing a cat-flap on your door is a simple process. However, you will need to know a few things prior to beginning. It is possible to install upvc panels with the cat door without cutting holes in your door or wall. Many glass companies offer them with holes that is already designed for a pet-door. 1. Safety Cat flaps made of upvc are simple to put in and can be adapted to different types of doors. They are weatherproof and energ