https://www.openlearning.com/u..../blockcasey-smovik/b
It is possible to put an apron flap inside an upvc panel or double glazing sealed unit. However, the most effective alternative is to install an entirely new glass pane that has an already-made hole. Take note of the instructions that will be provided with your cat flap kit and follow them carefully. Ensure that the shape drawn (be it square or circle) is accurately depicted on the template. Safety If you have a cat or dog and want to let them into the garden without leaving the door open A microchip acti