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Installing a cat-flap to your door is an easy process. You'll need to be aware of a few issues before beginning. You can put up upvc panels with the cat door without cutting holes in your wall or door. They are available from a range of glass suppliers with a hole that is pre-drilled for the door for your pet. 1. Safety The cat flaps made from upvc can be easily installed and put on different doors. They are weatherproof and energy efficient, and have an air-tight seal built-in to help insulate the opening. They are also fireproof and can