https://aiwins.wiki/wiki/How_M....uch_Does_a_Cat_Flap_
Installing a cat-flap on your door is an easy process. But, you'll have to be aware of a few things before getting started. You can put up Upvc panels to create a cat door without having to cut the door or wall. Many glass suppliers offer them with holes already cut to fit the purpose of a pet-door. 1. Safety Upvc door panels cat flaps are simple to put in and can be adapted to different kinds of doors. They are energy efficient and weatherproof and come with a draft excluder built-in that assists in insulating the opening. They ar