https://telegra.ph/How-to-Choo....se-a-Cat-Flap-Instal
Cat flaps are a great way to allow your pet to leave and come whenever it wants. You can choose a locking flap to stop other animals and cats from entering your home. Installing a cat flap to a bifolding doors is possible as long as the door frame is made from toughened glass. The frame should not be rotten or damaged. The process is similar to installing one on the door made of wood or uPVC. Easy to install Install a cat flap onto your bifold door to permit your pet to exit and enter the home without needing to open or clos