Over 60 Years of Experience. Founded in 1968 by Harlan Hanson, Central States Roofing started as a small, five employee operation as a venture from a Fort Dodge roofing company. Based in Ames we have grown to over 50 roofers, sheet metal workers, office staff, and management. With over 60 years of combined industry experience, President Mark Hanson and Vice President Scott Nelson have continued to expand the business while ensuring the quality roofing and customer service that Central States Roofing name has come to represent