How Thick Should an Asphalt Driveway Overlay Be? 1.5 inches 50% 2 inches 50% Get Free Quotes Today! Question: How Thick Should an Asphalt Driveway Overlay Be? Top Answer (50% of 6 votes): 2 inches. Answer: 2 inches Explanation: Depending on customers 12/1 or 2 WK Construction and paving Get Free Quotes Today! Find Local Pros Free Asphalt Driveway Installation Cost Estimates Related Questions Should Topsoil Be Removed Before Building an Asphalt Driveway?Top answer: Yes How Thick Should Asphalt Driveway Sub-Base Be?Top answer: 4 inches What is the average width of a driveway that fits one car?Top answer: 10-12 feet wide How Long Does It Take for an Asphalt Driveway to Fully Cure?Top answer: One week Can I Put an Asphalt Over My Old Concrete Driveway?Top answer: In most cases