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The installation of a cat flap in solid uPVC door panels or double-glazed sealed units is a lot easier than it sounds. If you don't have the right tools or no experience, you'll need an expert. Follow this guide to learn how to measure and mark the space in the uPVC panel to make your cat flap. Also, how to make it draft and weather resistant. Safety A upvc-clad panel with the flap for cats is a great way to ensure your pet's