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Professionals should be responsible for the installation of a cat flap on your door panel. These doors are typically constructed of a thin plastic exterior that is attached to an insulating, soft polystyrene core. These materials can be difficult to cut. It is a lot easier to put the cat flap on an existing glass pane, or to have the hole drilled for a new door. A glazier is capable of doing this for you. Easy to Fit If you have a cat and yo