Are you Looking for a Career?

A union apprenticeship is an excellent career choice if you like to work with your hands; are willing to serve an apprenticeship for up to five years, depending on the trade you select; have dexterity, mechanical ability, problem-solving skills and the ability to work collaboratively with a team; want to earn a living wage and good benefits; and want the opportunity to advance in your career.

  • Become skilled in a trade, and get paid to do it - "Earn While You Learn!"
  • Paid "scholarship" - no or low-cost supervised training 
  • Full-time employment with career placement built in 
  • Progressively increasing wage with excellent benefits 
  • Nationally recognized credential - Completion of Apprenticeship Certificate 
  • Improved job security and standard of living 
  • Pride and Dignity

Heat & Frost Insulator Apprenticeship

What Is A Heat And Frost Insulator?

The function of an insulator is to insulate mechanical structures, whether hot or cold, from ambient temperatures. Any surfaces having low, medium or high temperatures, such as boilers, refrigeration units, furnaces, heat exchangers, many pipes, tanks, etc., found in powerhouses, refineries, aboard ships, in high-rise buildings, will be insulated by our mechanics for process control, for fire protection, for personnel protection or for sound reduction. After the insulation has been applied, protective covers, coatings and jacketing are also fabricated and installed.


  • Must be at least 18 years of age. There is no maximum age.
  • Applicant must be in good health and physically able to perform all phases of the work. 
  • Must be a high school graduate (or equivalent). 
  • Applicant must have completed one year of geometry or algebra with a passing grade. 
  • Related Training Classes are conducted only in English. 
  • Applicant must complete all application forms and must be legally employable in the United States of America. 
  • Applicant must possess a current, valid drivers license allowing the applicant to operate a motor vehicle in California and/or Nevada.

Our program is sponsored jointly by the Heat and Frost Insulators and Asbestos Workers Union and Western Insulation Contractors Association. All participating apprentices are afforded excellent medical, vacation and pension plan benefits


To complete the program, apprentices must work at least 8000 hours on the job, rotating through various work processes. This is to obtain a well rounded exposure to the trade. Apprentices must also attend at least 800 hours to training classes (160 hours per year for five years) at the Insulators Apprentice Training Center.

Application Process

We accept applications on the second Monday at the beginning of each Quarter (January, April, July, and October).  Applications are accepted from 9:00 AM to 2:00 PM.  To further information please call (707) 748-0160.