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Cat flaps are an excellent way to allow your pet to move around as it pleases. You can also select a locking cat flap to keep other cats and animals from entering your home. You can put a cat flap in bifold doors, so long as the door is constructed of toughened glass and the frame is not damaged or rotten. The procedure is similar to installing one on a wooden door or uPVC. Easy to install Install a cat flap onto your bifold door to allow your pet to enter and exit the house without need