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Installing a cat-flap to your door is an easy procedure. However, you'll have to be aware of a few things prior to starting. Upvc door panels with an opening for cats can be fitted without having to cut holes in your door or wall. Many glass companies 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 come with an integrated draft excluder that helps to insulate the o