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Montana · Insulator (Heat & Frost / Asbestos Worker)
Montana insulator prevailing wage, county by county
An insulator's prevailing wage on Montana public works is $66.75 an hour in every county that has one (56), for the main classification.
Insulator (Heat & Frost / Asbestos Worker) rate in each Montana county, A to Z
| County | Base wage | Fringe benefits | Total rate | Effective | Source |
|---|---|---|---|---|---|
Beaverhead CountyINSULATION WORKERS - MECHANICAL (HEAT AND FROST) · Lewis and Clark County group | $43.81 | $22.94 | $66.75 | Apr 25, 2026 | MTDLI-BLD-2026-04-25 |
Big Horn CountyINSULATION WORKERS - MECHANICAL (HEAT AND FROST) · Yellowstone County group | $43.81 | $22.94 | $66.75 | Apr 25, 2026 | MTDLI-BLD-2026-04-25 |
Blaine CountyINSULATION WORKERS - MECHANICAL (HEAT AND FROST) · Gallatin County group | $43.81 | $22.94 | $66.75 | Apr 25, 2026 | MTDLI-BLD-2026-04-25 |
Broadwater CountyINSULATION WORKERS - MECHANICAL (HEAT AND FROST) · Lewis and Clark County group | $43.81 | $22.94 | $66.75 | Apr 25, 2026 | MTDLI-BLD-2026-04-25 |
Carbon CountyINSULATION WORKERS - MECHANICAL (HEAT AND FROST) · Yellowstone County group | $43.81 | $22.94 | $66.75 | Apr 25, 2026 | MTDLI-BLD-2026-04-25 |
Carter CountyINSULATION WORKERS - MECHANICAL (HEAT AND FROST) · Yellowstone County group | $43.81 | $22.94 | $66.75 | Apr 25, 2026 | MTDLI-BLD-2026-04-25 |
Cascade CountyINSULATION WORKERS - MECHANICAL (HEAT AND FROST) · Gallatin County group | $43.81 | $22.94 | $66.75 | Apr 25, 2026 | MTDLI-BLD-2026-04-25 |
Chouteau CountyINSULATION WORKERS - MECHANICAL (HEAT AND FROST) · Gallatin County group | $43.81 | $22.94 | $66.75 | Apr 25, 2026 | MTDLI-BLD-2026-04-25 |
Custer CountyINSULATION WORKERS - MECHANICAL (HEAT AND FROST) · Yellowstone County group | $43.81 | $22.94 | $66.75 | Apr 25, 2026 | MTDLI-BLD-2026-04-25 |
Daniels CountyINSULATION WORKERS - MECHANICAL (HEAT AND FROST) · Yellowstone County group | $43.81 | $22.94 | $66.75 | Apr 25, 2026 | MTDLI-BLD-2026-04-25 |
Dawson CountyINSULATION WORKERS - MECHANICAL (HEAT AND FROST) · Yellowstone County group | $43.81 | $22.94 | $66.75 | Apr 25, 2026 | MTDLI-BLD-2026-04-25 |
Deer Lodge CountyINSULATION WORKERS - MECHANICAL (HEAT AND FROST) · Lewis and Clark County group | $43.81 | $22.94 | $66.75 | Apr 25, 2026 | MTDLI-BLD-2026-04-25 |
Fallon CountyINSULATION WORKERS - MECHANICAL (HEAT AND FROST) · Yellowstone County group | $43.81 | $22.94 | $66.75 | Apr 25, 2026 | MTDLI-BLD-2026-04-25 |
Fergus CountyINSULATION WORKERS - MECHANICAL (HEAT AND FROST) · Gallatin County group | $43.81 | $22.94 | $66.75 | Apr 25, 2026 | MTDLI-BLD-2026-04-25 |
Flathead CountyINSULATION WORKERS - MECHANICAL (HEAT AND FROST) · Missoula County group | $43.81 | $22.94 | $66.75 | Apr 25, 2026 | MTDLI-BLD-2026-04-25 |
Gallatin CountyINSULATION WORKERS - MECHANICAL (HEAT AND FROST) · Gallatin County group | $43.81 | $22.94 | $66.75 | Apr 25, 2026 | MTDLI-BLD-2026-04-25 |
Garfield CountyINSULATION WORKERS - MECHANICAL (HEAT AND FROST) · Yellowstone County group | $43.81 | $22.94 | $66.75 | Apr 25, 2026 | MTDLI-BLD-2026-04-25 |
Glacier CountyINSULATION WORKERS - MECHANICAL (HEAT AND FROST) · Lewis and Clark County group | $43.81 | $22.94 | $66.75 | Apr 25, 2026 | MTDLI-BLD-2026-04-25 |
Golden Valley CountyINSULATION WORKERS - MECHANICAL (HEAT AND FROST) · Gallatin County group | $43.81 | $22.94 | $66.75 | Apr 25, 2026 | MTDLI-BLD-2026-04-25 |
Granite CountyINSULATION WORKERS - MECHANICAL (HEAT AND FROST) · Lewis and Clark County group | $43.81 | $22.94 | $66.75 | Apr 25, 2026 | MTDLI-BLD-2026-04-25 |
Hill CountyINSULATION WORKERS - MECHANICAL (HEAT AND FROST) · Gallatin County group | $43.81 | $22.94 | $66.75 | Apr 25, 2026 | MTDLI-BLD-2026-04-25 |
Jefferson CountyINSULATION WORKERS - MECHANICAL (HEAT AND FROST) · Lewis and Clark County group | $43.81 | $22.94 | $66.75 | Apr 25, 2026 | MTDLI-BLD-2026-04-25 |
Judith Basin CountyINSULATION WORKERS - MECHANICAL (HEAT AND FROST) · Gallatin County group | $43.81 | $22.94 | $66.75 | Apr 25, 2026 | MTDLI-BLD-2026-04-25 |
Lake CountyINSULATION WORKERS - MECHANICAL (HEAT AND FROST) · Missoula County group | $43.81 | $22.94 | $66.75 | Apr 25, 2026 | MTDLI-BLD-2026-04-25 |
Lewis and Clark CountyINSULATION WORKERS - MECHANICAL (HEAT AND FROST) · Lewis and Clark County group | $43.81 | $22.94 | $66.75 | Apr 25, 2026 | MTDLI-BLD-2026-04-25 |
Liberty CountyINSULATION WORKERS - MECHANICAL (HEAT AND FROST) · Lewis and Clark County group | $43.81 | $22.94 | $66.75 | Apr 25, 2026 | MTDLI-BLD-2026-04-25 |
Lincoln CountyINSULATION WORKERS - MECHANICAL (HEAT AND FROST) · Missoula County group | $43.81 | $22.94 | $66.75 | Apr 25, 2026 | MTDLI-BLD-2026-04-25 |
Madison CountyINSULATION WORKERS - MECHANICAL (HEAT AND FROST) · Lewis and Clark County group | $43.81 | $22.94 | $66.75 | Apr 25, 2026 | MTDLI-BLD-2026-04-25 |
McCone CountyINSULATION WORKERS - MECHANICAL (HEAT AND FROST) · Yellowstone County group | $43.81 | $22.94 | $66.75 | Apr 25, 2026 | MTDLI-BLD-2026-04-25 |
Meagher CountyINSULATION WORKERS - MECHANICAL (HEAT AND FROST) · Gallatin County group | $43.81 | $22.94 | $66.75 | Apr 25, 2026 | MTDLI-BLD-2026-04-25 |
Mineral CountyINSULATION WORKERS - MECHANICAL (HEAT AND FROST) · Missoula County group | $43.81 | $22.94 | $66.75 | Apr 25, 2026 | MTDLI-BLD-2026-04-25 |
Missoula CountyINSULATION WORKERS - MECHANICAL (HEAT AND FROST) · Missoula County group | $43.81 | $22.94 | $66.75 | Apr 25, 2026 | MTDLI-BLD-2026-04-25 |
Musselshell CountyINSULATION WORKERS - MECHANICAL (HEAT AND FROST) · Yellowstone County group | $43.81 | $22.94 | $66.75 | Apr 25, 2026 | MTDLI-BLD-2026-04-25 |
Park CountyINSULATION WORKERS - MECHANICAL (HEAT AND FROST) · Gallatin County group | $43.81 | $22.94 | $66.75 | Apr 25, 2026 | MTDLI-BLD-2026-04-25 |
Petroleum CountyINSULATION WORKERS - MECHANICAL (HEAT AND FROST) · Gallatin County group | $43.81 | $22.94 | $66.75 | Apr 25, 2026 | MTDLI-BLD-2026-04-25 |
Phillips CountyINSULATION WORKERS - MECHANICAL (HEAT AND FROST) · Gallatin County group | $43.81 | $22.94 | $66.75 | Apr 25, 2026 | MTDLI-BLD-2026-04-25 |
Pondera CountyINSULATION WORKERS - MECHANICAL (HEAT AND FROST) · Lewis and Clark County group | $43.81 | $22.94 | $66.75 | Apr 25, 2026 | MTDLI-BLD-2026-04-25 |
Powder River CountyINSULATION WORKERS - MECHANICAL (HEAT AND FROST) · Yellowstone County group | $43.81 | $22.94 | $66.75 | Apr 25, 2026 | MTDLI-BLD-2026-04-25 |
Powell CountyINSULATION WORKERS - MECHANICAL (HEAT AND FROST) · Lewis and Clark County group | $43.81 | $22.94 | $66.75 | Apr 25, 2026 | MTDLI-BLD-2026-04-25 |
Prairie CountyINSULATION WORKERS - MECHANICAL (HEAT AND FROST) · Yellowstone County group | $43.81 | $22.94 | $66.75 | Apr 25, 2026 | MTDLI-BLD-2026-04-25 |
Ravalli CountyINSULATION WORKERS - MECHANICAL (HEAT AND FROST) · Missoula County group | $43.81 | $22.94 | $66.75 | Apr 25, 2026 | MTDLI-BLD-2026-04-25 |
Richland CountyINSULATION WORKERS - MECHANICAL (HEAT AND FROST) · Yellowstone County group | $43.81 | $22.94 | $66.75 | Apr 25, 2026 | MTDLI-BLD-2026-04-25 |
Roosevelt CountyINSULATION WORKERS - MECHANICAL (HEAT AND FROST) · Yellowstone County group | $43.81 | $22.94 | $66.75 | Apr 25, 2026 | MTDLI-BLD-2026-04-25 |
Rosebud CountyINSULATION WORKERS - MECHANICAL (HEAT AND FROST) · Yellowstone County group | $43.81 | $22.94 | $66.75 | Apr 25, 2026 | MTDLI-BLD-2026-04-25 |
Sanders CountyINSULATION WORKERS - MECHANICAL (HEAT AND FROST) · Missoula County group | $43.81 | $22.94 | $66.75 | Apr 25, 2026 | MTDLI-BLD-2026-04-25 |
Sheridan CountyINSULATION WORKERS - MECHANICAL (HEAT AND FROST) · Yellowstone County group | $43.81 | $22.94 | $66.75 | Apr 25, 2026 | MTDLI-BLD-2026-04-25 |
Silver Bow CountyINSULATION WORKERS - MECHANICAL (HEAT AND FROST) · Lewis and Clark County group | $43.81 | $22.94 | $66.75 | Apr 25, 2026 | MTDLI-BLD-2026-04-25 |
Stillwater CountyINSULATION WORKERS - MECHANICAL (HEAT AND FROST) · Yellowstone County group | $43.81 | $22.94 | $66.75 | Apr 25, 2026 | MTDLI-BLD-2026-04-25 |
Sweet Grass CountyINSULATION WORKERS - MECHANICAL (HEAT AND FROST) · Gallatin County group | $43.81 | $22.94 | $66.75 | Apr 25, 2026 | MTDLI-BLD-2026-04-25 |
Teton CountyINSULATION WORKERS - MECHANICAL (HEAT AND FROST) · Lewis and Clark County group | $43.81 | $22.94 | $66.75 | Apr 25, 2026 | MTDLI-BLD-2026-04-25 |
Toole CountyINSULATION WORKERS - MECHANICAL (HEAT AND FROST) · Lewis and Clark County group | $43.81 | $22.94 | $66.75 | Apr 25, 2026 | MTDLI-BLD-2026-04-25 |
Treasure CountyINSULATION WORKERS - MECHANICAL (HEAT AND FROST) · Yellowstone County group | $43.81 | $22.94 | $66.75 | Apr 25, 2026 | MTDLI-BLD-2026-04-25 |
Valley CountyINSULATION WORKERS - MECHANICAL (HEAT AND FROST) · Yellowstone County group | $43.81 | $22.94 | $66.75 | Apr 25, 2026 | MTDLI-BLD-2026-04-25 |
Wheatland CountyINSULATION WORKERS - MECHANICAL (HEAT AND FROST) · Gallatin County group | $43.81 | $22.94 | $66.75 | Apr 25, 2026 | MTDLI-BLD-2026-04-25 |
Wibaux CountyINSULATION WORKERS - MECHANICAL (HEAT AND FROST) · Yellowstone County group | $43.81 | $22.94 | $66.75 | Apr 25, 2026 | MTDLI-BLD-2026-04-25 |
Yellowstone CountyINSULATION WORKERS - MECHANICAL (HEAT AND FROST) · Yellowstone County group | $43.81 | $22.94 | $66.75 | Apr 25, 2026 | MTDLI-BLD-2026-04-25 |
Main insulator classification in each county (Insulation workers - mechanical (heat and frost)), DLI 2026 rates, revised April 25, 2026. "The wage rates applicable to a particular public works project are those in effect at the time the bid specifications are advertised" (ARM 24.17.127). Checked October 25, 2026.
How much does an insulator make on prevailing wage in Montana?
$66.75 an hour in every county that has a rate, for the main classification. 4 groups of counties with identical rates and 0 with rates of their own, highest main rate first.
- Yellowstone County group21 counties · INSULATION WORKERS - MECHANICAL (HEAT AND FR$66.75
- Gallatin County group14 counties · INSULATION WORKERS - MECHANICAL (HEAT AND FR$66.75
- Lewis and Clark County group14 counties · INSULATION WORKERS - MECHANICAL (HEAT AND FR$66.75
- Missoula County group7 counties · INSULATION WORKERS - MECHANICAL (HEAT AND FR$66.75
Which counties share a rate
| Counties | Main classification | Base wage | Total rate |
|---|---|---|---|
| Yellowstone County group, 21 localities: Big Horn, Carbon, Carter, Custer, Daniels, Dawson, Fallon, Garfield, McCone, Musselshell, Powder River, Prairie, Richland, Roosevelt, Rosebud, Sheridan, Stillwater, Treasure, Valley, Wibaux, Yellowstone | INSULATION WORKERS - MECHANICAL (HEAT AND FROST) | $43.81 | $66.75 |
| Gallatin County group, 14 localities: Blaine, Cascade, Chouteau, Fergus, Gallatin, Golden Valley, Hill, Judith Basin, Meagher, Park, Petroleum, Phillips, Sweet Grass, Wheatland | INSULATION WORKERS - MECHANICAL (HEAT AND FROST) | $43.81 | $66.75 |
| Lewis and Clark County group, 14 localities: Beaverhead, Broadwater, Deer Lodge, Glacier, Granite, Jefferson, Lewis and Clark, Liberty, Madison, Pondera, Powell, Silver Bow, Teton, Toole | INSULATION WORKERS - MECHANICAL (HEAT AND FROST) | $43.81 | $66.75 |
| Missoula County group, 7 localities: Flathead, Lake, Lincoln, Mineral, Missoula, Ravalli, Sanders | INSULATION WORKERS - MECHANICAL (HEAT AND FROST) | $43.81 | $66.75 |
4 groups of counties with identical DLI rates, and 0 counties with rates of their own.
DLI publishes journey-level rates only. Registered apprentices are paid the percentage of this rate set in their apprenticeship program, plus the full fringe benefit (18-2-416(2) MCA); unregistered apprentices get the journey-level rate.
Questions about Montana insulator pay
What is the insulator prevailing wage in Yellowstone County?
$66.75 an hour: a $43.81 base wage plus $22.94 in benefits, under DLI 2026 rates, revised April 25, 2026. Overtime and every insulator classification in Yellowstone County.
Does insulator prevailing wage include fringe benefits?
Yes. In Yellowstone County the $66.75 total is a $43.81 base wage plus $22.94 in benefits, about 34% of the total. The employer owes the full amount for every hour worked.
Does insulator prevailing wage pay overtime in Montana?
Hours over 40 in a week pay at least 1½ times the basic hourly rate. Overtime is calculated on the base rate, not the benefit, and benefits are paid for every hour at the straight-time amount (DLI FAQ). There is no daily overtime.
Do apprentice insulators get this rate?
DLI publishes journey-level rates only. Registered apprentices are paid the percentage of this rate set in their apprenticeship program, plus the full fringe benefit (18-2-416(2) MCA); unregistered apprentices get the journey-level rate.
Why do some counties have the same insulator rate?
DLI often publishes the same insulator rates for several counties. Across Montana, the 56 counties with an insulator rate fall into 4 distinct sets of rates, and 4 of those sets are shared by more than one county; the largest covers 21 counties (the Yellowstone County group).