We want to help you feel comfortable knowing that you have all the information needed to make the best decision on your next commercial roofing project. The shingles installed on commercial buildings are not builder-grade shingles. The reason is that builder-grade shingles provide the least wind protection and need replacing every 10 to 12 years. The disadvantage is the cost, having to install multiple layers means we roof the building multiple times to get one roof system. Heating up asphalt and pumping it up on the roof is also a very dangerous job.