Cat Doors For a Screen
If it’s mild weather and you’ve got the window open for ventilation, a cat flap in the screen is a great idea.
They’re simple to install: With the screen laying on the living room floor, clamp the two pet door frames together and cut out the screen in the center so the flap can swing through. In some cases the cat door will come with screen pre-installed and, in others, it will accept the screen you cut out so you’ll have a perfect match. Strong, wire screen is best. Avoid weak fiberglas screen that may not stand up to the impact of a pet going in and out.
Some people buy these cat doors that don’t even own pets. They’re a great way to hand food and drinks from the kitchen out to the patio without having to walk all the way out!