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Installing a cat flap in your door is a relatively simple task. But, you'll require some things prior to starting. It is possible to install Upvc panels that have a cat door without cutting the wall or door. Many glass companies offer them with holes already cut for a pet-door. 1. Safety Upvc door panels cat flaps are simple to install and can be adapted to different kinds of doors. They are energy-efficient and weatherproof, and have draft-proo