Certified Roofing Contractors Specializing In Roof Repairs And Re-Roofing Services. At Carolina United Roofing and Construction, we have many years of experience working in the Triad and Triangle areas and beyond. We have more than ten years' worth of experience in the industry and are known for our high-quality work and outstanding customer service. Serving Burlington, Apex, Graham, Cary, Elon, , Greensboro, Chapel Hill, Durham, Hillsborough and beyond.