About Us

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.   

Insulators Local Union No.1
3325 Hollenberg Drive
Bridgeton, MO 63044
Phone: 314 291 7399

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