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It's much easier than you think to install the cat flap on a solid uPVC panel or a sealed double-glazed unit. If you don't have the proper equipment or know-how, you'll require the assistance of professionals. Follow this guide to learn how to measure, mark and cut the space in the uPVC panel for your cat flap. Also, learn how to make the flap weatherproof and draft resistant. Safety A upvc panel with an enclosed flap fo