https://articlescad.com/cat-fl....ap-installation-cost
It is possible to insert the cat flap onto an upvc panel or double glazing sealed unit. However, the best alternative is to install a new glass pane with an already-made hole. Follow the directions that came with the kit. Make sure the drawing accurately represents the shape (circle or square). Safety If you have a cat or dog and want to let them in the garden without having the door open, a microchip activated pet flap on your upvc door panel is a great option. This will only let your pet in, and prevent other animals and