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Installing a cat flap on your door is a relatively simple task. However, you'll have to be aware of a few things prior to beginning. Upvc door panels with the cat flap can be fitted without having to cut a hole in your door or wall. Many glass suppliers offer them with a hole already made to fit an animal-friendly door. 1. made of upvc are easy to install and can be fitted to many different kinds of doors. They are energy-efficient and wea