https://world-news.wiki/wiki/Window_With_Cat_Flap
Installing a cat flap on your home is a simple process. You'll need to be aware of a few things before beginning. Upvc door panels with an opening for cats can be fitted without having to cut holes in your door or wall. Many glass companies offer them with a hole already cut for the purpose of a pet-door. 1. Safety The upvc cat flaps are easy to install and installed to different doors. They are energy-efficient and weatherproof and come with an air-tight seal built-in to aid in insulating the opening. They are also fire resistant and c