https://articlescad.com/cat-fl....ap-fitters-594103.ht
https://notes.io/w5VbS
You and your cat can both benefit from having 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 flap you will need. This will help you design an opening for the flap that is of the right size. Outdoor Access While installing a cat flap in an exterior back door isn't a task for the novice, those with minimal DIY skills can usually do it. This will cut down on the expen