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Installing a cat flap in your home is a simple process. However, you will need to know a few things prior to beginning. Upvc door panels that have an opening for cats can be fitted without having to cut an opening in your door or wall. Many glass suppliers offer them with a hole already made to fit an animal-friendly 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 a draft excluder built in to