https://squareblogs.net/teeths....how6/cat-flap-instal
It is possible to put a cat flap into a upvc panel or a double glazing sealed unit. However, the best option would be to install a new glass pane with a pre-made hole. Follow the directions included in the kit. Make sure that the shape you have drawn (be it circle or square) is accurately represented on your template drawing. Safety If you have a cat or dog and would like to let them into the garden without having the door open, a microchip-activated pet flap on your door panel made of upvc is a great option. It will