A-1 Concrete Leveling has grown from a small independent start-up to become America's Largest Concrete Leveler. As a result of our continuing search and development, A-1 has expanded its focus, offering structural repair and reinforcement, chimney realignment, and straightening of bowed walls in addition to the concrete leveling work which is the foundation of our success. You know us as Nichols Concrete Services Inc., as A-1 Concrete Leveling in the Columbus and Mansfield area. We have done your concrete leveling and concrete work for 30 years.