https://blogfreely.net/hawkvis....e8/back-door-with-ca
https://output.jsbin.com/tayujopitu/
You're tired of having climb up to open the door for your pet. If you are, then a cat flap could be the solution. Pet-flap installers are able to install them in any type of door, regardless of whether it's uPVC, composite or composite. They can also fit them into some types of walls. Security Cat flaps are usually used to cover doors, however many also have them installed on windows or double-glazed doors. A glass-based cat flap is a great option when you don't want cut through a