Find something solid that’s about a foot thick, disconnect the door from the motor driven track, raise the door manually about a foot and a half, and slide the solid object under the door and gently lower the door on top of it. Or better yet, get an overhead garage screen door. We got one from Coolbreeze and like it very much.

Why not have the small vents installed on each side of the door on the bottom? They work real good too.

We have a garage screen door to avoid the critter problem.

Finally
 

Glad to see someone other than me realizes it doesn't take much of a crack for some critters to get in.

i'd say yes, i agree. some of my outdoor lizard friends have found a way to sneak in, even when i thought everything was solid. it goes to show where there's a will, there's a way. i get them out & they want back in when i'm not looking.

That’s exactly how mine worked in in Ohio, Florida & here in Texas!

Heat Rises
 

Given that heat rises I don't think leaving your garage door open a foot at the bottom will help much. And of course there is the animal issue which may or may not be a problem in your area.

Insulate the garage door, it will help.

Neighborliness
 

So as to have snacks prepared?

Have learnt a lot in this thread, but still pondering that "rule" about hot air rising. If it's hotter inside the garage than out and there's a gap at the bottom, will the hotter air inside the garage agree to follow said rule and refuse to move laterally prior to gaining the opportunity to rise? Would this involve supervision by Maxwell's demon? Always looking to learn.

It does seem that the solutions generally don't seem to be "worth" the efforts, and I *know* that both of us would eventually drive through the screens.

I doubt that leaving it open slightly makes much difference in the temperature

Agree and I hate this fact. Nice to have some non electrical light in my garage

Thanks for the chuckles. :)

Thursday night chuckles
 

Then I'll see you Thursday evening at 6:30 at the Colony Cottage/Laural Manor Rooms at Rohan? :-)

You simply push the button to open or close and then hit it again at the point you want it to stop. I agree. If you are going to leave it open you are best to do it only if you have a screen installed.

Since hot air rises, leaving the bottom foot or so of your garage door open would NOT help anything. You need an exhaust fan close to the ceiling pushing hot air out and THEN you could find a way to let the cooler lower air flow around the garage.