I didn't mention this on my previous post, but it works really good. The only negative is it's going to defeat your fire barrier between the home and the garage. So when I do it, I'm out in the garage working, but when I'm done, I close it back.
I have attic steps like these except I have aluminium steps because the all wood model can warp. I had Tim Miller (Tim the Toolman) who is TV the top floor coating specialist install them in 2011. Before he was doing floors, he was the best handyman in TV. He installed the aluminium steps, and 100 sf of plywood flooring in the attic for $295.
What I found was, with the ridge vent at the ridge of the roof line, by propting the door open only about 6 inches, I use a small cardboard box and just wedge it in there, and with the garage door up and I have the screens, you'll feel a steady breeze going up through the attic access.
The other reason besides fire that I don't keep the access open all the time is that termites will not live where temperatures are above 120 degrees, so for that reason I keep the attic door closed and even with a hot attic, my electric bill in the summer is never over $90.
