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Installing a cat-flap in your door is a simple procedure. You will need to be aware of a few issues prior to getting started. Upvc door panels with the cat flap can be installed without having to cut an opening in your wall or door. They are available from a range of glass suppliers with a pre-made hole to fit the door for your pet. 1. Safety The upvc cat flaps can be easily installed and put on different doors. are weatherproof and energy efficient and feature an air-tight seal bu