There’s a lot of debate surrounding how much asphalt is necessary for a driveway. Some people believe that 2 inches are enough, while others think you need at least 4 inches. So, what’s the correct answer? Well, it depends on your specific situation. If you have a relatively flat driveway and live in a temperate climate, 2 inches may be enough. However, if your driveway is hilly, has lots of curves, or if you live in colder weather, you’ll probably need more than 2 inches.