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Consider installing a cat flap onto the door made of upvc for those who want to allow your pet to enter and exit the house without worrying that they'll leave behind unwanted "gifts". This option is cheaper than replacing the whole door and is simpler to install. While it is possible to put an animal flap inside your own uPVC door, it's important to be aware that this is a challenging job and could lead to costly mistakes. Easy to install When you have a cat or