https://selfless.wiki/wiki/Fit....ting_Cat_Flap_in_UPV
A cat flap made of UPVC allows your cats to go and go as they please. It's a simple three-step installation procedure that can be installed on wooden doors, glass doors, or UPVC panels. It is an excellent choice for those who wish to ensure their pets are safe and reduce energy costs. UPVC panels are resistant to moisture, heat, and UV. Easy to install If you have a cat you might want to think about installing a pet flap inside your glass door or window. This is a great solution to keep your pet secure while you're away. Th