26 Plus Years Experience. Gustin & Son Foundation & Flatwork, Inc. has been serving the Warrensburg MO., area since 1986. We specialize in all matters of foundations and flatwork. -Basements -Retaining Walls -Footings -Floors -Driveways -Parking Lots -Decorative and Stained Concrete -Excavating -Waterproofing Call us for a free estimate today!