Local 25 Heat & Frost Insulators

Proudly serving the Southeast Michigan area for over 110 years

Our members make the world a safer and cleaner place to live.

Who We Are

Our mission is to continue our 110+ year tradition of creating good career opportunities for working families in our local community.


Do you work in Mechanical Insulation, Firestop/Life Safety, or Architectural Spray Insulation? We’d love to represent you.

Join Us

Our Registered Apprenticeship program gives you the skills to represent the next generation of highly-skilled Mechanical Insulation experts.

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