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https://telegra.ph/Cat-Flap-In....stallation---How-to-
It's much simpler than you think to set up the cat flap on a solid uPVC panel or sealed double-glazed unit. However, if you don't have the appropriate tools or experience you will require the assistance of a professional. Follow this guide to learn how to measure and mark the area in the uPVC panel to make your cat flap. Also, how to make it draft and weather resistant. Safety A door made of upvc with a cat flap is