https://blogfreely.net/tiplink....7/cat-flap-fitters-n
https://brandt-kok.technetblog....gers.de/cat-flap-ins
https://postheaven.net/deskrob....ert1/cat-flap-glass-
It's easier than you think to install the cat flap on a solid uPVC panel or sealed double glazed unit. If you don't possess the proper tools or no experience, you will need the help of a professional. Follow this guide to learn how to measure, mark and cut the area of the uPVC panel to make your cat flap. Additionally, learn how to make it draft and weather resis