How To Fit A Cat Flap In A Wall. A cat flap is a handy solution which you can fit into a door yourself. While it may take a while for your cat to learn how to use the cat flap, never force it to walk through the cat.
So you know how long to make your plywood tunnel you'll need to know how thick the wall is that you're putting it i then firmly fixed the tunnel in position using small wedges of wood.
I then decided to put it online as i really struggled finding any sort of detailed info when i set out. With the front of the cat flap in position select a bit that is slightly narrower than the screws and inserts it into the drill. Make your cat's life a little easier by learning how to fit a cat flap. How big of a cat flap you should install so your cat will be able to fit through it comfortably can be determined by measuring how far your cat's belly stands from the ground.