The International Association of Heat & Frost Insulators Workers union was established in 1903 and represents over 51 local unions in the US and Canada. The union works to secure better wages, benefits, and working conditions for its members by collectively bargaining with employers. Membership provides health insurance, retirement benefits, paid vacations, training opportunities, and wages that start at $43 per hour for mechanics. To join, applicants must be 18 years old, have a high school diploma, and their own transportation.