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Washington · Insulator (Heat & Frost / Asbestos Worker)
Washington insulator prevailing wage, county by county
An insulator's prevailing wage on Washington public works runs from $68.80 an hour in Whitman County to $100.83 in Chelan County, wages and fringe benefits together. The median county is $100.83.
Insulator (Heat & Frost / Asbestos Worker) rate in each Washington county, A to Z
| County | Base wage | Fringe benefits | Total rate | Effective | Source |
|---|---|---|---|---|---|
Adams CountyJourney Level · Spokane County group | $45.81 | $22.99 | $68.80 | Aug 31, 2025 | LNI-148825 |
Asotin CountyJourney Level · Spokane County group | $45.81 | $22.99 | $68.80 | Aug 31, 2025 | LNI-148825 |
Benton CountyJourney Level · Spokane County group | $45.81 | $22.99 | $68.80 | Aug 31, 2025 | LNI-148825 |
Chelan CountyJourney Level · King County group | $81.42 | $19.41 | $100.83 | Sep 2, 2026 | LNI-149612 |
Clallam CountyJourney Level · King County group | $81.42 | $19.41 | $100.83 | Sep 2, 2026 | LNI-149612 |
Clark CountyMechanic · Clark County group | $62.02 | $25.77 | $87.79 | Aug 31, 2025 | LNI-148623 |
Columbia CountyJourney Level · Spokane County group | $45.81 | $22.99 | $68.80 | Aug 31, 2025 | LNI-148825 |
Cowlitz CountyMechanic · Clark County group | $62.02 | $25.77 | $87.79 | Aug 31, 2025 | LNI-148623 |
Douglas CountyJourney Level · King County group | $81.42 | $19.41 | $100.83 | Sep 2, 2026 | LNI-149611 |
Ferry CountyJourney Level · Spokane County group | $45.81 | $22.99 | $68.80 | Aug 31, 2025 | LNI-148825 |
Franklin CountyJourney Level · Spokane County group | $45.81 | $22.99 | $68.80 | Aug 31, 2025 | LNI-148825 |
Garfield CountyJourney Level · Spokane County group | $45.81 | $22.99 | $68.80 | Aug 31, 2025 | LNI-148825 |
Grant CountyJourney Level · Spokane County group | $45.81 | $22.99 | $68.80 | Aug 31, 2025 | LNI-148825 |
Grays Harbor CountyJourney Level · King County group | $81.42 | $19.41 | $100.83 | Sep 2, 2026 | LNI-149612 |
Island CountyJourney Level · King County group | $81.42 | $19.41 | $100.83 | Sep 2, 2026 | LNI-149612 |
Jefferson CountyJourney Level · King County group | $81.42 | $19.41 | $100.83 | Sep 2, 2026 | LNI-149612 |
King CountyJourney Level · King County group | $81.42 | $19.41 | $100.83 | Sep 2, 2026 | LNI-149612 |
Kitsap CountyJourney Level · King County group | $81.42 | $19.41 | $100.83 | Sep 2, 2026 | LNI-149612 |
Kittitas CountyJourney Level · King County group | $81.42 | $19.41 | $100.83 | Sep 2, 2026 | LNI-149611 |
Klickitat CountyMechanic · Clark County group | $62.02 | $25.77 | $87.79 | Aug 31, 2025 | LNI-148623 |
Lewis CountyJourney Level · King County group | $81.42 | $19.41 | $100.83 | Sep 2, 2026 | LNI-149612 |
Lincoln CountyJourney Level · Spokane County group | $45.81 | $22.99 | $68.80 | Aug 31, 2025 | LNI-148825 |
Mason CountyJourney Level · King County group | $81.42 | $19.41 | $100.83 | Sep 2, 2026 | LNI-149612 |
Okanogan CountyJourney Level · King County group | $81.42 | $19.41 | $100.83 | Sep 2, 2026 | LNI-149611 |
Pacific CountyJourney Level · King County group | $81.42 | $19.41 | $100.83 | Sep 2, 2026 | LNI-149612 |
Pend Oreille CountyJourney Level · Spokane County group | $45.81 | $22.99 | $68.80 | Aug 31, 2025 | LNI-148825 |
Pierce CountyJourney Level · King County group | $81.42 | $19.41 | $100.83 | Sep 2, 2026 | LNI-149612 |
San Juan CountyJourney Level · King County group | $81.42 | $19.41 | $100.83 | Sep 2, 2026 | LNI-149612 |
Skagit CountyJourney Level · King County group | $81.42 | $19.41 | $100.83 | Sep 2, 2026 | LNI-149612 |
Skamania CountyMechanic · Clark County group | $62.02 | $25.77 | $87.79 | Aug 31, 2025 | LNI-148623 |
Snohomish CountyJourney Level · King County group | $81.42 | $19.41 | $100.83 | Sep 2, 2026 | LNI-149612 |
Spokane CountyJourney Level · Spokane County group | $45.81 | $22.99 | $68.80 | Aug 31, 2025 | LNI-148825 |
Stevens CountyJourney Level · Spokane County group | $45.81 | $22.99 | $68.80 | Aug 31, 2025 | LNI-148825 |
Thurston CountyJourney Level · King County group | $81.42 | $19.41 | $100.83 | Sep 2, 2026 | LNI-149612 |
Wahkiakum CountyMechanic · Clark County group | $62.02 | $25.77 | $87.79 | Aug 31, 2025 | LNI-148623 |
Walla Walla CountyJourney Level · Spokane County group | $45.81 | $22.99 | $68.80 | Aug 31, 2025 | LNI-148825 |
Whatcom CountyJourney Level · King County group | $81.42 | $19.41 | $100.83 | Sep 2, 2026 | LNI-149612 |
Whitman CountyJourney Level · Spokane County group | $45.81 | $22.99 | $68.80 | Aug 31, 2025 | LNI-148825 |
Yakima CountyJourney Level · King County group | $81.42 | $19.41 | $100.83 | Sep 2, 2026 | LNI-149611 |
Main insulator classification in each county, L&I period 2026-2, commercial rates. You pay the rate for the county where the work is done. Checked October 24, 2026.
How much does an insulator make on prevailing wage in Washington?
$68.80 to $100.83 an hour, base wage plus fringe benefits, depending on the county; the median county pays $100.83. 3 groups of counties with identical rates and 0 counties with rates of their own, highest main rate first, each split into base wage and fringe benefits on one scale.
- King County group20 counties · Journey Level$100.83
- Clark County group5 counties · Mechanic$87.79
- Spokane County group14 counties · Journey Level$68.80
Which counties share a rate
| Counties | Main classification | Base wage | Total rate |
|---|---|---|---|
| King County group, 20 counties: Chelan, Clallam, Douglas, Grays Harbor, Island, Jefferson, King, Kitsap, Kittitas, Lewis, Mason, Okanogan, Pacific, Pierce, San Juan, Skagit, Snohomish, Thurston, Whatcom, Yakima | Journey Level | $81.42 | $100.83 |
| Clark County group, 5 counties: Clark, Cowlitz, Klickitat, Skamania, Wahkiakum | Mechanic | $62.02 | $87.79 |
| Spokane County group, 14 counties: Adams, Asotin, Benton, Columbia, Ferry, Franklin, Garfield, Grant, Lincoln, Pend Oreille, Spokane, Stevens, Walla Walla, Whitman | Journey Level | $45.81 | $68.80 |
3 groups of counties with identical L&I rates, and 0 counties with rates of their own.
These are journey-level rates. Registered apprentices are paid L&I's apprentice rate for the trade (RCW 39.12.021), which L&I publishes in its wage lookup.
Questions about Washington insulator pay
What is the insulator prevailing wage in King County?
$100.83 an hour: a $81.42 base wage plus $19.41 in fringe benefits, under L&I period 2026-2. Overtime and every insulator classification in King County.
Does insulator prevailing wage include fringe benefits?
Yes. In King County the $100.83 total is a $81.42 base wage plus $19.41 in fringe benefits, about 19% of the total. The employer owes the full amount for every hour worked.
Do apprentice insulators get this rate?
Registered apprentices get L&I's apprentice rate for the trade (RCW 39.12.021), which L&I publishes in its wage lookup. Anyone else on the job is paid as a journey-level worker.
Why do some counties have the same insulator rate?
L&I often publishes the same insulator rates for several counties. Across Washington, the 39 counties with an insulator rate fall into 3 distinct sets of rates, and 3 of those sets are shared by more than one county; the largest covers 20 counties (the King County group).
Which county pays insulators the most in Washington?
Chelan County, at $100.83 an hour for the main classification. The lowest is Whitman County at $68.80, and the median county is $100.83.