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The addition of a cat flap to your door's panel is an important task that should be completed by a professional. These doors typically consist of the plastic exterior, which is thin and flimsy, and then joined to a soft, insulation polystyrene core. It isn't easy to cut through these materials. It is a lot easier to put the cat flap on an existing glass pane, or have the hole prepared 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 exit without leaving your h