Live in FL and when I return from a trip and pull the car in the garage it heats the garage and the sealed attic above to well over 100 degrees and it stays hot forever baking all the stuff I have stored in the attic. I have thought about some kind of exhaust fan (like in the bathroom vent fan...
have a 1.5 garage that I keep a Porsche in. It is block construction attached with a sealed attic and a simple reflective heat shield on the underside of the roof. The block walls are insulated and so is the garage door. When I pull the car in after a drive and close the door the heat from the...