https://jsfiddle.net/wob0kncx/
It is possible to put the cat flap onto an upvc panel or double glazing sealed unit. The best solution is to put in an entirely new glass pane that has a hole that is already made. Read the instructions that should be included with your cat flap kit, and follow them carefully. Make sure that the drawing accurately represents the shape (circle or square). Safety A microchip activated pet door in your door made of upvc is a great option if you have a dog or cat and would like to let them out in the garden, but do not want to open the door. It will only allo