It is possible to put the cat flap onto a upvc panel or a double glazing sealed unit. However, the best option would be to install a new glass pane with an already-made hole. Follow the instructions provided with the kit. Ensure that the shape drawn (be it circle or https://catflapinstallernearme80831.nizarblog.com/30870783/how-much-does-a-cat-flap-cost