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https://writeablog.net/sudanpe....n69/cat-flap-install
https://bennett-eriksson.thoug....htlanes.net/cat-flap
Professionals should take care of the installation of a cat flap onto your door panel. These doors are usually made from a thin, plastic exterior that is attached to an insulation-enhancing, soft polystyrene base. It isn't easy to cut through these materials. It is a lot easier to fit the cat flap inside an existing glass pane or to have the hole