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Your cat and you can both benefit from incorporating a cat flap in your bifold door. It also helps to stop extreme heat or cold weather from entering your home. The first step is to measure your pet's measurements to determine the size of the door flap you will need. This will help you create a hole of appropriate for the cat flap. Outdoor Access Even those with minimal DIY skills can install a cat flap on an outside back door. will save you the expense and hassle of contacting an experienced joi