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Installing a cat-flap to your home is a simple process. You'll need to be aware of a few issues before you begin. 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 variety of glass suppliers with a premade hole to fit the door for your pet. 1. Safety The cat flaps made from upvc can be easily erected and installed to different doors. They are energy efficient and weatherproof, and have an air-tight seal built-in to help insulate the ope