https://pena-higgins-2.technet....bloggers.de/cat-flap
Cat flaps allow your pet to leave and come back whenever it wishes. You can also choose an enclosed cat flap to stop other cats and animals from gaining access to your home. It is possible to install an animal flap inside bifold doors, so long as the door is composed of toughened glass and the frame isn't damaged or rotten. 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 enables your pet to go in and out of your home without hassle,