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It's easier than you think to set up the cat flap on the solid uPVC panel or sealed double glazed unit. If you don't have the right tools or no experience, you'll need a professional. This guide will teach you how to mark the measurement, cut and mark the cat flap area on the uPVC panel. Also, how to make the flap weatherproof and draft-proof. Safety A upvc door panel with cat flap is an excellent way