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Adding to your door is an essential task that should be completed by a professional. These doors are usually made from a thin, plastic exterior that is bonded to an insulation-enhancing, soft polystyrene base. These materials are often difficult to cut. It's much simpler to install the cat flap inside an existing glass pane, or have a new door manufactured with the hole already made. A glazier can do this for you. Easy to install Upvc door panels can be an excellent option if you have a cat at home and would l