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The addition of a cat flap to your door is an important task that should be completed by a professional. These doors are usually made of a plastic exterior that is attached to an insulate, soft polystyrene core. These materials can be hard to cut. It is much easier to fit the cat flap on an existing glass pane or to make the hole for a new door. A Glazier can do this for you. Easy to Fit If you have a cat and would like to allow them to enter and e