https://telegra.ph/Fitting-a-Cat-Flap-11-02-10
https://mcguire-wade-4.blogbri....ght.net/through-wall
A cat flap made of UPVC allows your cats to go and go as they please. It is a simple 3-step installation process and can be fitted into glass doors, wooden doors or UPVC panels. This is a great option for those who wish to keep their pets secure and reduce energy costs. UPVC panels are tough and are resistant to heat, UV and moisture. Easy to install Installing a pet flap over your glass panel or door is an excellent idea if you have a cat. This is a great option