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The addition of a cat flap to your door's panel is an essential task that should be carried out by an expert. These doors are usually made of a plastic exterior, which is then bonded to an insulate, soft polystyrene core. It can be difficult to cut through these materials. It's much simpler to install the cat flap inside an existing glass pane or have a brand new door manufactured with the hole already made. A Glazier can do this for you. Easy to Fit Upvc door panels are an ideal option if have a cat at home and want to allow it