PMSI Inc is your insulation installation service company. Whether your needs are heat retention, protection from freezing, or just more efficient heating and cooling, the PMSI team can help. PMSI has experience in pipe insulating, duct insulating, tank insulating, and more. Based in Winthrop Harbor, IL, Projects and Maintenance Services of Illinois is an insulation installation company serving customers in Illinois, Wisconsin, Missouri, Indiana, and Iowa. Please visit our mission and about pages for more information about our company and our safety policy. Contact us for more information on how we can be of service to you.