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than you think to install an animal flap inside a solid uPVC panel or sealed double-glazed unit. However, if you don't have the proper tools or expertise, you'll need to employ an expert. Follow this guide to learn how to measure, mark and cut the area of the uPVC panel for your cat flap. Additionally, learn 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 security while still allowing the pet to move freely. These panels are made from r