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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 possess the right tools or no experience, you'll need an expert. Follow this guide to learn how to measure and mark the area of the uPVC panel to make your cat flap. Also, learn how to make the flap weatherproof and draft resistant. Safety A upvc door with cat flaps is a great way to ensure your pet's security while still allowing them freedom of movement. These panels can be constructed from recycled materials and require very