So it’s currently 100 degrees F in my garage today. I’m sure it will only get worse as the summer goes on. I added some of those insulated garage door panels, but I don’t think they did anything.
Now I’m wondering if I should add fiberglass insulation to the attic space above the garage. Would this help, or just lock in the heat? Would using a radiant barrier up there work better?
You need some kind of vent fan to blow that air out of there. Like a thermostat attic fan for example, In the garage. I’ve seen people crack a window if you got it. Crack the garage door or back/side door when you’re home. Nothing is going to get rid of that heat except some ventilation of some kind.