https://mozillabd.science/wiki..../Cat_Flap_Installer_
Cat flaps allow your pet to come and go whenever it wants. You can also select a cat flap that locks to stop other cats and animals from gaining access to your home. You can install the cat flap on a bifold door, as long as the panel is constructed of toughened glass and the frame is not rotten or damaged. The procedure is the same as installing a cat flap in a wooden or uPVC door. Easy to install Adding a cat flap to your bifold doors will allow your pet to go in and out of the house without hassle, and without needing to open