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Our Services

Boiler Insulation

Duct Insulation

Pipe Insulation

Equipment Insulation

No Project Too Big Or Too Small

Since 1983, customers have trusted Northern Industrial Insulation to perform high quality, reliable insulation services throughout the Midwest operating at both new and retrofit projects.

Northern Industrial Insulation contracts all types of pipe, boiler, duct and equipment insulation. NII maintains a large stock of thermal insulation and accessories for distribution to industrial, commercial and contractor accounts.

Northern Industrial Insulation is committed to the total success of your insulation projects.  

Years Established

Completed Projects

Commercial & Industrial Projects


NII has completed thousands of commercial projects regionally and locally since 1983. Recent clients include:

  • University of Minnesota Duluth 
  • University of Wisconsin Superior
  • Local & Regional Public School Districts
  • Micro Breweries: Bent Paddle, Castle Danger, Blacklist, Ursa Minor, Fitger’s and Earth Rider 
  • Pier B Hotel 
  • Kwik Trip Stores
  • Maurices Corporate Headquarters 
  • Hospitals: St. Lukes & Essentia Health


Industrial Insulation is at the heart of our namesake and our our expertise. NII is proud to have worked on a number of industrial sites in the region including:       

  • Fraser Shipyards
  • Air National Guard
  • Sappi
  • Husky Refinery
  • Cleveland Cliffs
  • Duluth Energy
  • Mesabi Nugget
  • Northern Natural Gas 

Contact Us

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3757 Midway Rd, Hermantown, MN 55810

(218) 624-0574

Professional Affiliations