https://blogfreely.net/sandrap....rofit8/upvc-door-pan
https://squareblogs.net/badger....parade7/cat-flap-ins
You and your cat can both benefit from having an animal flap into your bifold door. It can also help stop extreme heat or cold weather from entering your home. The first step is to take measurements of your pet to determine what size door flap you need. This will help you create a hole of adequate to fit the cat flap. Outdoor Access While installing a cat flap inside an external back door isn't a task for the novice, those with a little DIY