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Installing a cat flap in your door is a relatively easy process. You'll need to be aware of a few points prior to getting started. You can put up Upvc panels to create a cat door without having to cut the wall or door. Many glass manufacturers offer them with holes already cut to fit an animal-friendly door. 1. Safety Cat flaps made of upvc are simple to put in and can be installed to many different kinds of doors. They are weatherproof and energy efficient and have an integrated draft excluder that helps t