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Professionals should take care of the installation of a cat flap onto your door panel. The doors are typically made of a plastic exterior, which is then bonded to an insulating, soft polystyrene core. It isn't easy to cut through these materials. It's a lot easier to put the cat flap inside an existing pane of glass or have a new door constructed with the hole already made. A Glazier can do this for you. Easy to Fit Upvc door panels are an excellent option if you have a cat that you would like to allow it to enter an