https://www.openlearning.com/u..../gadegaardsmedegaard
It is possible to install the cat flap onto an upvc panel or double glazing sealed unit. However, the best alternative is to install the glass pane from scratch using a pre-made hole. Follow the directions that should be included with the kit for cat flaps, and follow them with care. Ensure that the shape drawn (be it square or circle) is accurately drawn on the template. Safety If you have a cat or dog and want to let them into the garden without having the door open, a microchip activated pet flap in