https://clinfowiki.win/wiki/Po....st:Using_a_Cat_Flap_
It is possible to install an animal flap into a door panel made of upvc, or a double glazing glass sealed unit, although the best option is to have a new pane of glass 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 shape you have drawn (be it circle or square) is accurately represented on the template. Safety A microchip activated pet panel in your door made of upvc is a great solution when you have a pet or cat and wish to let the