https://output.jsbin.com/naruzoxosi/
https://zenwriting.net/alleyth....roat15/back-door-wit
It is possible to fit the cat flap inside a door panel made of upvc, or a double glazing glass sealed units, although the best option is to buy a new pane of glass with an already-made hole. Follow the directions included in your kit. Make sure that the shape you have drawn (be it a square or circle) is accurately represented on your template drawing. If you have a cat or dog and want to let them into the garden without leaving the door open, a microchip activated pet flap in