Wisconsin Trades & Asbestos Exposure
Wisconsin's union construction trades and industrial workers handled, installed, removed, and worked alongside asbestos-containing materials on virtually every major industrial project from the 1930s through the 1980s. The trade you worked — and the specific tasks you performed during normal duty — determines which asbestos products you encountered and which manufacturers may be responsible. Below: documented exposure pathways per trade, drawn from public litigation records, OSHA inspection histories, and industrial hygiene literature.
Trade tasks listed below describe job functions documented in public records as routes of asbestos exposure for workers in these crafts. They are general exposure pathways, not claims about any individual worker's case.
Trades Exposed to Asbestos During Normal Duties
HFIA Local 19 (Pewaukee — Milwaukee/Madison/Southern WI) · Local 34 (St. Paul, MN — covers Western WI including Superior, Eau Claire)
How They Were Exposed
- Cutting asbestos pipe covering to fit elbows, valves, and reducers
- Tearing off old pipe covering during repair and outage work
- Mixing asbestos insulating cement ("mud") in open buckets
- Knocking off asbestos block insulation from boiler walls
- Sawing asbestos block to fit irregular surfaces
- Spraying asbestos-containing fireproofing on structural steel
Boilermakers Local 107 (Brookfield — statewide Wisconsin)
How They Were Exposed
- Crawling inside boilers during annual outages alongside disturbed insulation
- Welding and cutting on asbestos-gasketed manways and access doors
- Replacing asbestos rope packing in soot blowers and steam valves
- Removing and repairing asbestos block lagging on boiler walls
- Cutting asbestos millboard for fireboxes and breechings
- Working in confined boiler spaces saturated with airborne fiber
UA Steamfitters Local 601 (Milwaukee/Madison — 14 SE counties) · Local 400 (Kaukauna — Green Bay/Fox Valley/Sheboygan) · Local 118 (Kenosha — Racine/Kenosha) · Local 434 (Mosinee — Northern WI)
How They Were Exposed
- Cutting into insulated steam and process lines to add fittings
- Removing and replacing asbestos pipe gaskets at flanged joints
- Repacking valve stems with asbestos rope packing
- Working below insulators stripping pipe covering overhead
- Hot work (welding, brazing) on asbestos-insulated lines
- Maintaining steam traps, strainers, and heat exchangers with asbestos gaskets
UA Plumbers Local 75 (Milwaukee/Madison) · Local 400 (Green Bay/Fox Valley) · Local 118 (Racine/Kenosha) · Local 434 (Northern WI)
How They Were Exposed
- Cutting asbestos-cement (transite) water and waste pipe
- Replacing valve packing and gaskets on domestic water lines
- Working on boiler-room piping insulated with asbestos covering
- Tying into existing systems where insulators had removed lagging
- Demolition cutting of cast-iron and AC pipe in renovation work
IBEW Local 494 (Milwaukee/SE WI) · Local 159 (Madison) · Local 158 (Green Bay) · Local 577 (Appleton/Fox Valley) · Local 388 (Wausau) · Local 953 (Eau Claire) · Local 242 (Duluth — Superior/NW WI) · Local 430 (Racine/Kenosha)
How They Were Exposed
- Pulling wire through asbestos-insulated conduits and cable trays
- Replacing arc-chute components and phenolic boards in switchgear
- Working around insulators in boiler rooms, mechanical rooms, and pipe chases
- Installing motors with asbestos brake friction discs
- Cutting holes in asbestos-cement panels and transite walls
- Bystander exposure during shutdowns and turnarounds
Iron Workers Local 8 (Milwaukee/East Coast WI incl. Green Bay/Sheboygan/Kenosha) · Local 383 (Madison/Western/Central/Northern WI)
How They Were Exposed
- Erecting structural steel while sprayed asbestos fireproofing was applied
- Welding and burning on beams coated with asbestos-containing fireproofing
- Rigging in boiler rooms and turbine halls during insulation work
- Cutting and installing reinforcing bar through transite forms
- Ongoing exposure to settled fireproofing dust in completed steel buildings
North Central States Regional Council of Carpenters / Northern Midwest RCC — statewide Wisconsin with locals in Milwaukee, Madison, Green Bay (Local 1146)
How They Were Exposed
- Cutting and sanding asbestos-cement transite siding and roofing
- Removing vinyl-asbestos floor tile during renovation
- Installing ceiling tile with asbestos-containing backing
- Working with asbestos-containing joint compound and texture sprays
- Demolition framing through walls insulated with asbestos batt
SMART Local 18 (Waukesha — statewide construction except NW counties) · Local 565 (production/manufacturing)
How They Were Exposed
- Cutting and installing asbestos-lined HVAC duct in mechanical rooms
- Fabricating boiler breechings and stack components with asbestos millboard
- Working alongside insulators applying duct insulation
- Sealing duct joints with asbestos-containing mastic
- Removing old duct systems during retrofit projects
BAC District Council of Wisconsin (New Berlin — statewide bricklayers, refractory masons, cement masons, plasterers, tile)
How They Were Exposed
- Mixing asbestos-containing refractory cement and mortar by hand
- Patching firebox linings on industrial boilers and furnaces
- Installing asbestos-backed hot tops in steel mill ladles
- Cutting refractory brick with abrasive saws and bricksaws
- Removing spalled refractory during furnace relines
UBC Millwrights Local 2337 (Pewaukee — SE Wisconsin) · Local 1056 (Kaukauna — Northern/Central/Fox Valley WI)
How They Were Exposed
- Aligning and repairing turbines, pumps, and compressors with asbestos packing and gaskets
- Setting machinery on asbestos-cement bedplates and isolation pads
- Replacing asbestos clutch and brake friction in industrial drives
- Working in insulated pump rooms during shutdowns
- Maintaining conveyors and screens with asbestos-containing components
IUOE Local 139 (Pewaukee — statewide Wisconsin)
How They Were Exposed
- Operating stationary boilers and steam plants insulated with asbestos
- Maintaining heavy equipment with asbestos brake linings and clutches
- Repacking valves and replacing gaskets on plant utilities
- Working in boiler rooms and engine rooms alongside insulators
- Crane and hoist work in industrial buildings during construction
LIUNA Local 113 (Milwaukee) · Local 464 (Madison) · Local 330 (Green Bay/NE WI) under Wisconsin Laborers' District Council
How They Were Exposed
- Tear-off and demolition of insulated piping, boilers, and equipment
- Cleanup of asbestos debris and dust from work areas
- Mixing and tending insulating cement for insulators
- Hauling waste asbestos materials to dumpsters before abatement standards
- General labor in refineries, mills, and power plants during outages
IUPAT District Council 7 (Big Bend — statewide WI + Upper Peninsula MI); Milwaukee Local 781
How They Were Exposed
- Mixing and applying asbestos-containing joint compound ("mud")
- Sanding dried joint compound with hand and machine sanders
- Applying asbestos-containing texture sprays and acoustic ceilings
- Scraping old paint and texture from asbestos substrates
- Working in industrial environments with bystander exposure from insulators
Roofers Local 65 (New Berlin — SE Wisconsin/Milwaukee) · Local 96 (Blaine, MN — Northern WI)
How They Were Exposed
- Tearing off built-up roofing with asbestos-impregnated felts
- Cutting transite roofing panels with abrasive saws
- Applying asbestos-containing roofing mastic and flashing cement
- Installing asbestos-felt vapor barriers and underlayments
- Working on industrial roofs with asbestos-cement deck
USW District 2 paper locals — Fox Valley/Wisconsin River corridor (Kimberly-Clark Fox Crossing/Neenah, Georgia-Pacific Green Bay, Mosinee, Rhinelander mills)
How They Were Exposed
- Operating paper machines and digesters insulated with asbestos at Kimberly-Clark, Georgia-Pacific, Mosinee, and Consolidated mills
- Replacing asbestos dryer-can roll covers and felts on paper machines
- Handling asbestos gaskets on pulp digesters and bleaching towers
- Repacking pump and valve packing in pulping and recovery boilers
- Bystander exposure to insulators during annual mill outages
UAW Local 72 (Kenosha AMC/Chrysler — plant closed 2010) · Local 95 (Janesville GM — plant idled 2008) · Local 578 (Oshkosh Truck) · Local 833 (Kohler Co.) · Local 180 (Case/CNH Racine)
How They Were Exposed
- Grinding and arc-grinding asbestos brake linings at Kenosha AMC, Janesville GM, Oshkosh, and Case Racine plants
- Handling asbestos clutch facings and friction products during build
- Casting work with asbestos-containing refractory at Kohler foundry
- Bystander exposure to insulation work on plant utility piping
- Cleanup duties with airborne fiber in stamping and paint shops
Various locals at Miller, Pabst, Schlitz (historical), Harley-Davidson, Allen-Bradley, A.O. Smith, Allis-Chalmers (historical)
How They Were Exposed
- Working in breweries with asbestos-insulated ammonia refrigeration and steam piping
- Handling asbestos gaskets and packing on heavy industrial machinery at Allis-Chalmers and A.O. Smith
- Maintaining boilers and process equipment with asbestos lagging
- Bystander exposure to insulators in industrial shops
- Demolition of legacy refrigeration and steam systems
IBEW & UWUA — We Energies (WEPCo), Alliant Energy WI, Xcel Energy, Dairyland Power
How They Were Exposed
- Watch standing in boiler rooms with asbestos lagging at Oak Creek, Pleasant Prairie, Edgewater, Columbia, Weston, and Genoa stations
- Maintaining feedwater pumps and condensate systems with asbestos packing
- Inspecting and tagging out equipment during annual boiler outages
- Sampling and adjusting steam systems through insulated valves
- Bystander exposure during boilermaker and insulator outage work
UAW (plants) · IAM (shops) · Independents
How They Were Exposed
- Blowing out brake drums with compressed air during brake jobs
- Grinding and arc-grinding asbestos brake linings to size
- Replacing asbestos clutch facings in cars and trucks
- Handling asbestos brake parts from major aftermarket suppliers
- Working with asbestos-containing gaskets on engines and manifolds
UA · SMART · IBEW (combined HVAC trades)
How They Were Exposed
- Servicing chillers and air handlers with asbestos-insulated cabinets
- Replacing fan-coil units in schools, hospitals, and office buildings
- Repairing steam radiators wrapped in asbestos covering
- Disturbing asbestos pipe insulation during ductwork penetrations
- Removing old asbestos-lined boilers and furnaces
SEIU · Independent — schools, hospitals, civic buildings
How They Were Exposed
- Stripping and waxing vinyl-asbestos tile floors with high-speed buffers
- Cleaning up debris in boiler rooms and mechanical chases
- Patching damaged asbestos pipe insulation with tape or cement
- Sweeping up dust from deteriorating ceiling tiles and pipe covering
- Daily work in buildings with friable asbestos before AHERA
Wisconsin Filing Deadline for Trade Workers
Wisconsin gives asbestos disease victims three years from diagnosis to file under Wis. Stat. § 893.54. Union members frequently worked at dozens of jobsites across decades — every facility, every contractor, every employer matters in establishing exposure. A Wisconsin asbestos attorney can help reconstruct your full work history and identify every responsible product manufacturer and premises owner.
Connect With an Asbestos and Mesothelioma Attorney with Experience in Wisconsin
A diagnosis of mesothelioma or an asbestos-related illness may entitle you and your family to significant compensation through asbestos trust funds and civil litigation. An experienced Wisconsin attorney can evaluate your case — at no cost to you.
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