https://articlescad.com/adding....-a-cat-flap-to-your-
Cat flaps allow your pet to move around whenever it wishes. You can choose a locking flap to keep other cats and animals from entering your home. Installing a cat flap to a bifolding doors is possible, provided the panel is made of toughened glass. The frame must not be rotten or damaged. It's the same as installing one on the door made of wood or uPVC. Easy to install The addition of a cat flap to your bifold doors will allow your pet to go in and out of your home without hassle, and without having to open and