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https://mcelroy-kahn.federated....journals.com/upvc-do
Adding a cat flap to your door panel is an essential task that should be completed by a professional. These doors are usually made of a thin plastic exterior that is bonded to an insulation-enhancing, soft polystyrene base. These materials can be hard to cut. It's much easier to install the cat flap inside an existing pane of glass or have a new do