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Installing a cat flap in your door is a relatively simple process. However, you will have to be aware of a few things prior to starting. Upvc door panels that have an opening for cats can be installed without having to cut holes in your door or wall. Many glass manufacturers offer them with a hole that is already designed to fit the purpose of a pet-door. 1. Safety The cat flaps made from upvc can be easily erected and installed to different doors. They are energy-efficient and weatherproof and come with a draft excluder bu