I have high quality ceramic tint all around except the roof (windshield I could only to Air 90 because of dumb Texas laws) and the truck doesn't get very hot. The roof is a source of far less heat than you might think. It has a high IR and nearly complete UV rejection from the factory. Adding a layer of ceramic tint is in my future, but the heat transmittal is so low it's not bothering me much. I live in Austin, so yes it's hot here.