Headquartered in Union, Missouri, hth companies, inc. provides construction services to commercial and industrial customers t ... hroughout the Midwest. hth companies was founded in March 1984 as a merit-shop mechanical insulation company. Today, hth companies offers a wide array of services including mechanical insulation, scaffold erection, industrial cleaning and maintenance, welding, pipefitting and confined space rescue. hth comapnies, inc - Scaffold Erection With over 30 years of experience, hth companies continues to promote the merit shop philosophy it was founded upon, rewarding employees based upon their merits of skills, productivity and quality workmanship. Our vision is to be an organization that creates an environment where employees are encouraged to develop their full potential to provide quality work. We strive each day to better serve our customers and our employees. Find us on Twitter! @hth_inc Follow us on Facebook! read more