https://botdb.win/wiki/Fitting...._a_Cat_Flap_in_a_UPV
Installing a cat flap on your door panel is an important task to be handled by a professional. The doors are typically made of a thin plastic exterior, which is then bonded to an insulating, soft polystyrene core. These materials can be hard to cut. It is much simpler to put the cat flap into an existing glass pane, or to have the hole drilled for a new door. A glazier is capable of doing this for you. Easy to Fit If you have a cat and want to allow them to enter and exit without leaving your home door panels made of upvc are an