https://wifidb.science/wiki/Ca....t_Flap_Installation_
Installing a cat flap on your door panel is an essential task to be handled by an expert. The doors are typically made of a thin plastic exterior that is attached to an insulating, soft polystyrene core. These materials can be difficult to cut. It's much easier to install the cat flap inside an existing pane of glass, or have a new door manufactured with the hole already made. A glass glazier can help you. Easy to Fit Upvc door panels are an ideal option if have a cat that you want to allow it to enter and out of your home