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Incorporating a cat flap into your bifold doors can provide numerous benefits for both you and your feline companion. It also helps to prevent extreme heat or cold from entering your home. The first step is to measure your pet's measurements to determine the size of the flap you'll require. This will enable you to create a hole of the correct size for the flap. Outdoor Access Even those with no DIY skills can manage to install a cat flap onto an external back door. This will save you the expense and hassle