https://scientific-programs.sc....ience/wiki/Using_a_C
It is possible to install the cat flap inside a door panel made of upvc, or a double glazing glass sealed units, although the best option is to have a new glass pane that has an already-made hole. Follow the directions included in the kit. Make sure that the shape you have drawn (be it circle or square) is accurately drawn on your template drawing. Safety If you have a cat or dog and would like to let them into the garden without leaving the door open, a microchip-activated pet flap on your upvc door panel is a g