https://funsilo.date/wiki/Cat_....Flap_Installation_Ho
It is possible to put an animal flap into the door panel made of upvc or double glazing glass sealed units but the best solution is to purchase a brand new glass pane that has an already-made hole. Follow the directions that should be included with your cat flap kit, and follow them with care. Make sure that the shape you have drawn (be it a square or circle) is accurately depicted on the template. Safety If you have a cat or dog and want to let them into the garden without opening the door A microchip