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Installing a your door is a relatively simple process. You'll need to be aware of a few issues before beginning. Upvc door panels that have a cat flap can be installed without needing to cut an opening in your wall or door. They are available from a number of glass suppliers with a pre-made hole to fit the door for your pet. 1. Safety The cat flaps made of upvc are easy to install and fitted to a variety of different doors. They are weatherproof and energy efficient and feature an air-tight seal built-in to aid in