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Installing a cat-flap in your door is a simple process. You'll need to be aware of a few things before you begin. You can install Upvc panels to create the cat door without cutting a hole into your wall or door. Many glass suppliers provide them with holes that is already designed for a pet-door. 1. Safety The upvc cat flaps are easy to install and put on different doors. They are weatherproof and energy efficient, and have an air-tight seal built-in to aid in insulating the opening. They are also resistant to fire and can be adapted to meet security needs. They al