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Installing a cat flap on your door's panel is a crucial task that should be carried out by an experienced professional. The doors are typically made of a flimsy plastic exterior that is bonded to a soft insulating polystyrene core. These materials can be difficult to cut. It is much simpler to put the cat flap into an existing glass pane or to have the hole drilled in a new door. A Glazier can do this for you. Easy to Fit Upvc door panels are an excellent option if you have a cat that you want to allow it to enter and out of you