The International Association of Heat and Frost Insulators and Allied Workers (HFIAW or Insulators) is a trade union in the United States and Canada.

The primary focus of the union is to assist its membership in securing employment, to defend their rights and advance their interests as working men and women, and by education and cooperation, raise them to that position in society to which they are justly entitled.

WORK IS INSTALLED BY OUR PROFESSIONAL MECHANICAL INSULATORS THAT HAVE ACHIEVED JOURNEYMAN STATUS IN THE UNION THROUGH A MULTI-YEAR CLASSROOM AND 1,600 HOUR PER YEAR ON-THE-JOB TRAINING PROGRAM ALONG SIDE THOSE WHO ARE LEARNING THE TRADE.

HFIAW is affiliated with the AFL-CIO and the Canadian Labour Congress and represents nearly 30,000 craftsmen in a series of construction trades.