Roider Contracting | 3002 Hanover Rd., Columbia, IL | Contact: Paul Roider (314) 807-0492, (618) 939-0492. Contractor specializing in building, excavating, designing homes, garages, patios, driveways and more in the Columbia, IL 62236 area. Custom interiors and exteriors. Materials include epoxy flooring, stamped concrete, exposed aggregate, acid stained concrete for patios, walkways, driveways, and more. We use only the highest grade materials to build value into your home.