ASTTU Welcomes New Partner: Insulators Local 48
ST. LOUIS and ATLANTA, GA, May 4, 2026 / — Insulators Local 48 has been representing skilled mechanical insulation workers in the Atlanta area since 1933, when its charter was established during the Great Depression. From its earliest days, the Local has played a critical role in helping workers secure fair wages, strong benefits, and safer working conditions while building a foundation for long-term career opportunities in the trade.
Over the decades, Local 48 Members have contributed to some of the most recognized commercial and industrial projects across Atlanta and North Georgia. Their work in mechanical insulation supports energy efficiency, safety, and performance across a wide range of systems, including HVAC, steam piping, refrigeration, and specialized industrial equipment. Today, the trade continues to be one of the most impactful “green” building professions, helping reduce energy consumption and operating costs.
Local 48’s commitment to excellence is driven by its strong focus on training and safety. Its Department of Labor-approved apprenticeship program, established in 1976, continues to produce highly skilled Journeymen who uphold the highest standards in the industry. Through education, experience, and solidarity, Local 48 ensures its Members are prepared to meet the evolving demands of modern construction and industrial work.
As part of the International Association of Heat and Frost Insulators and Allied Workers—representing more than 25,000 skilled craftspeople across the United States and Canada—Local 48 carries forward a proud legacy of protecting workers’ rights and advancing the insulation industry.
The Association of Skilled Trade and Transportation Unions (ASTTU) is honored to welcome Insulators Local 48 as a new partner. Together, we will work to protect their Members, support union labor, and continue building a stronger, safer, and more energy-efficient future across Georgia and beyond.
Learn more about Insulators Local 48 at www.atlantainsulators48.com.
