Frequently Asked Questions
    Career Worksheet

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), must have completed one year of geometry with a minimum grade of “C”.
  • 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.
  • Applicant must have completed one year of geometry or algebra with a passing grade.

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 7200 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 576 hours to training classes (144 hours per year for four 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).

Local program requirements may vary from area to area please contact individual programs for more information.

Southern California
Address Phone Email Web Site
3833 Ebony street Ontario Ca, 91761 (909) 390-7002
Northern California
Address Phone Email Web Site
Heat & Frost Insulators Local 16 JATC
3801 Park Rd., Benicia, CA 94510
(707) 748-0160
(707) 748-0161 (fax)