https://staal-bauer-3.federate....djournals.com/using-
It is possible to put an apron flap inside a upvc panel or a double glazing sealed unit. However, the best solution is to put in a new glass pane with an already-made hole. Read the instructions that should be included in your cat flap kit, and follow them closely. Make sure that the template drawing accurately represents the shape (circle or square). Safety If you have a cat or dog and want to let them into the garden without opening the door, a microchip activated pet flap inside your door panel m