https://yamcode.com/using-a-ca....t-flap-in-bifold-doo
https://notes.io/w5xjj
Professionals should handle the installation of a cat flap onto your door panel. These doors typically consist of the plastic exterior, which is thin and flimsy, and then bonded to a soft, insulate polystyrene. It isn't easy to cut through these materials. It's much easier to install a cat flap into an existing pane of glass or have a brand new door constructed with the hole already prepared. A glazier is able to do this for you. Easy to Fit If you have a cat and would like to allow them to enter and e