https://postheaven.net/kayakca....st7/through-wall-cat
https://www.openlearning.com/u..../kirklanddickerson-s
You could consider installing a cat flap onto the door made of upvc for those who want to let your pet go inside and out of the house without fearing that they'll leave behind unwanted "gifts". This is less expensive than replacing the whole door and easier to install. While it's possible to put a cat flap in your own uPVC door, it's important to know that this is a difficult job that could result in expensive mistakes. Easy to install It'