The advantage is attention to detail. Concrete is at the heart of every construction project, and it is imperative that the foundation of your building is completed properly; otherwise, no matter how beautiful the finished product, it will ultimately be unsuccessful.
Additionally, since concrete is often the starting point after initial site preparation and grading, scheduling can get quite tricky. By having one point of contact for both concrete and construction, you can save a significant amount of stress and gain time efficiencies purely through ease-of-coordination and flexible scheduling.