About Us

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Founded in 1898 and chartered in 1904, Local #1 has been a leader in the mechanical insulation industry for over a century. Local #1 currently represents 350 certified members, trained in the industries latest insulation and safety standards.  

Local #1 has 33 signatory contractors covering 36 counties in Missouri and 37 in Illinois, to provide the safest and most productive work force in the bi-state area. From oil refinery’s and power plants to hospitals and office buildings, our members and contractors can provide energy saving services to last decades.