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Installing a cat-flap on your home is a simple process. However, will need to know a few things prior to beginning. Upvc door panels with an opening for cats can be installed without having to cut a hole in your door or wall. Many glass companies offer them with a hole already made for the purpose of a pet-door. 1. Safety The cat flaps made of upvc can be easily erected and installed to different doors. They are energy efficient and weatherproof and have an integrated draft excluder that helps to seal the opening. They are also fireproof and can be tailor