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You could consider installing a cat flap onto the door made of upvc if you want to let your pet go inside and out of the house without worrying that they'll leave behind unwanted "gifts". This option is cheaper than replacing the entire door and is easier to put in. It is possible to set up a cat flap on your own uPVC doors however, it's an arduous task that can lead to costly mistakes. Easy to install It's important that you can allow your pet or cat i