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Installing a cat-flap to your door is a simple procedure. It is important to be aware of a few issues before you begin. You can put up Upvc panels to create the cat door without cutting holes in your wall or door. Many glass suppliers offer them with holes already made for a pet-door. 1. Safety upvc door panels cat flaps are easy to install and can be adapted to different types of doors. They are weatherproof and energy efficient and come with a draft excluder built-in that helps to insulate the opening. They are also fire-res