• Sun Coke Industrial Plant Granite City IL with Bistate Insulations Piping Ductwork and Vessel
  • Bistate Insulation St. Louis Insulated Fiberglass PVC Aluminum Jacketing Piping at Broin Ethanol Modules, Macon Missouri
  • Bistate Insulation of mineral wool and aluminum jacketing piping and ductwork at Ameren Portage STL


Established in 1999, Bi-State Insulation is a full-service, nationally bonded mechanical insulation and lagging contractor serving the Midwest and surrounding areas.

With a convenient location in the city of St. Louis, Missouri, we proudly employ a union workforce and provide exceptional service, competitive pricing, and superior project management.


Specializing in both industrial and commercial insulation projects our expertise ranges from heavy industrial to light commercial installations.

The industries we serve include aerospace, food and beverage processing, power generation, Ethanol/bio-diesel, pulp and paper industry, institutional and governmental buildings, schools and many more.


ISN certified, our safety program and practices are intended to produce zero incidents, zero recordables and no lost time on every project, regardless of size.

Bi-State focuses on safety throughout each project to minimize the risks of all involved. The result of this philosophy is reflected in low EMR ratings.

Member of ISNetworld and BROWZ