https://articlescad.com/cat-fl....ap-cover-for-winter-
You could consider installing a cat flap on an upvc panel door for those who want to allow your pet to leave and enter the house without worrying that they'll leave unwelcome "gifts". This option is cheaper than replacing the entire door and easier to put in. It is possible to set up a cat flap on your own uPVC doors, but it is an arduous job that could result in costly errors. Easy to install If you have a dog or cat living in your home it is crucial to be able to let them out and in your home. This will keep them safe and