https://theflatearth.win/wiki/....Post:Adding_a_Cat_Fl
The incorporation of a cat flap into your bifold doors can provide numerous benefits for both you and your cat. It also helps to prevent extreme heat or cold from entering your home. The first step is to measure your pet's size to determine the size of the door flap you will require. This will help you create a hole that is adequate to fit the cat flap. Outdoor Access Even those with minimal DIY skills can install a cat flap onto an external back door. This will save you the cost and headache of hiring a handyman