https://opensourcebridge.scien....ce/wiki/How_to_Train
https://theflatearth.win/wiki/....Post:UPVC_Door_Panel
It is possible to insert the cat flap onto the upvc panel, or even a double glazing sealed unit. However, the best alternative is to install the glass pane from scratch using an already-made hole. Read the instructions that should be included in your cat flap kit and follow them carefully. Make sure that the template drawing accurately represents the shape (circle or square). If you have a dog or cat and would like to allow them access to