https://www.openlearning.com/u..../andreasencorcoran-s
https://mcdonald-corcoran-4.te....chnetbloggers.de/cat
Cat flaps are a great way to allow your pet to move around as it pleases. You can choose a locking flap to prevent other cats and animals from entering your home. Installing a cat flap on the bifolding door is feasible, provided the panel is made from toughened glass. The frame should not be rotten or damaged. The process is similar to installing a cat flap on a wooden door or uPVC. Easy to install