Insulators are the occupation most closely tied to asbestos disease, because asbestos was not a side hazard of the job. It was the job. Pipe covering, block insulation, and insulating cement were everyday materials in the trade for decades, and the National Cancer Institute lists insulation work among the occupations where asbestos health hazards have been recognized (NCI asbestos fact sheet).
How Insulation Works Creates Asbestos Dust Every Day
An insulator’s workday was a series of dusty tasks. Sawing asbestos pipe covering to length sent dust into the air. Mixing insulating cement, known in the trade as mud, from dry powder bags did the same. Trimming block insulation to fit boiler walls and breechings added more. Tear-out work, where old lagging was stripped from pipes and vessels by hand, often produced the heaviest dust of all. Much of this work happened overhead, with crumbling material at eye level, inside engine rooms, boiler houses, and pipe tunnels where the air barely moved. Helpers and apprentices breathed the same dust from their first days on the job, sweeping scraps and hauling material long before they ran crews of their own.
Why Insulators Faced Higher Asbestos Exposure Than Other Trades
Many trades encountered asbestos as bystanders. Insulators created the dust themselves, at close range, over entire careers. Federal health agencies, including the Agency for Toxic Substances and Disease Registry, have not identified any safe level of asbestos exposure (ATSDR), and insulators worked at the heaviest end of the exposure range. The trade’s history is also unusually well documented. Insulators and their union locals played a central role in decades of asbestos research and litigation, and much of the medical understanding of asbestos disease came from studying insulation workers. That record can help families today show that the work involved significant exposure.
Pennsylvania Job Sites Where Insulators Encountered Asbestos
The trade followed heat and steam, and Pennsylvania had plenty of both:
- Shipyards along the Delaware River, including the Philadelphia Naval Shipyard, where insulators lagged boilers and piping in tight engine spaces below deck
- Power-generating stations, including PECO plants in the Philadelphia area
- Steel mills, refineries, and chemical plants across the state, each with extensive runs of insulated pipe
- Commercial and institutional buildings served by steam heat
Insulators are a cornerstone of our occupations with the asbestos exposure index. Trades that worked alongside them, especially plumbers and pipefitters and boilermakers, often breathed much of the same dust.
Secondhand Asbestos Exposure in Insulators’ Families
Insulating cement and lagging dust clung to work clothes. The National Cancer Institute notes that family members can face risk from fibers carried home on clothing (NCI). Spouses who washed work clothes and children who rode in the family car may have their own history of secondhand exposure. Some union locals eventually urged members to change before heading home, but for much of the trade’s history, dusty clothing came home every night.
Mesothelioma Claims for Pennsylvania Insulators and Their Families
Insulator cases often benefit from a well-established record of which products were used on the job. The makers of pipe covering, block, and insulating cement are widely known; their sales histories have been examined in many prior cases, and a number of them funded asbestos bankruptcy trusts that, according to the U.S. Government Accountability Office, were established with tens of billions of dollars in assets (GAO-11-819). For a Pennsylvania insulator or surviving family members, this can mean more than one path to compensation, such as trust claims alongside a lawsuit. Legal deadlines apply to these claims, so acting promptly after a diagnosis matters. Families of insulators who have already passed away may still have options through wrongful death and survival claims, which carry their own time limits.
Get a Free Mesothelioma Case Review for an Insulator in Your Family
If insulation work is part of your family’s history and a mesothelioma diagnosis has followed, request a free case review. We can put union records, job site histories, and product information to work for your family.