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Cat flaps are an excellent way to let your pet come and go at their own pace. You can select a locking flap to keep other cats and animals from entering your home. Installing a cat flap to a bifolding door is possible provided that the door is made from toughened glass. The frame should not be damaged or rotten. The process is similar to installing a cat flap on an old wooden door or uPVC. Easy to install Add a cat flap on your bifold door to permit your pet to exit and enter the house without you ha