Since 1985, Gen Pro, Inc. has been providing the best construction materials available to the homeowners, contractors and construction companies of Sioux City, Iowa, and the surrounding areas. Whether you're building a new room, a new home or updating your current home, we have all the supplies you need. As the Siouxland's building material specialists, we make it a priority to stay up to date on new home design and home improvement trends, and carry the construction materials necessary to bring them to life.