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Installing a cat flap on your door is a relatively simple task. You will need to be aware of a few points before you begin. Upvc door panels with a cat flap can be installed without having to cut holes in your wall or door. Many glass suppliers provide them with holes already made for an animal-friendly door. 1. Safety The cat flaps made of upvc can be easily erected and put on different doors. They are weatherproof and energy efficient, and have a draft excluder built in to aid in insulating the opening. They are also firep