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The addition of a cat flap to your door is a crucial task that should be completed by an experienced professional. The doors are typically made of a flimsy plastic exterior joined to a soft, insulation polystyrene core. It can be difficult to cut through these materials. It is much simpler to fit the cat flap inside an existing glass pane or to have the hole drilled in a new door. A glazier is able to do this for you. Easy to Fit If you have a cat and want to let them in and out without having to