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Washington · Insulator (Heat & Frost / Asbestos Worker) · 20 counties

Insulator (Heat & Frost / Asbestos Worker) prevailing wage, King County group, Washington (20 counties)

L&I sets the same insulator rates, row for row, in 20 counties: Chelan, Clallam, Douglas, Grays Harbor, Island, Jefferson, King, Kitsap, Kittitas, Lewis, Mason, Okanogan, Pacific, Pierce, San Juan, Skagit, Snohomish, Thurston, Whatcom and Yakima. Every figure on this page applies in each of them.

$100.83an hour, base wage + fringe benefits

$81.42 base wage + $19.41 fringe benefits

On Washington public works in each of these 20 counties, an insulator must be paid at least $100.83 an hour in total: $81.42 in wages plus $19.41 in fringe benefits for health, pension, vacation, training and other plans. L&I's rate took effect September 2, 2026.

L&I published this rate on August 3, 2026 and it took effect September 2, 2026. Checked against L&I's wage lookup on October 24, 2026.

Base wage and fringe benefits: $81.42 + $19.41

The wage is the taxable hourly rate. The other lines are what Washington law calls "usual benefits": contributions to health, pension, vacation and holiday, apprenticeship and similar plans. A contractor that doesn't provide a benefit pays its value as wages instead (RCW 39.12.010).

Base wage (taxable)$81.42
Health and welfare$9.24
Pension$5.82
Vacation and holiday$2.46
Training$1.50
Other benefits$0.39
Total straight-time hourly rate$100.83

Set from: collective bargaining agreement, 2014-2030 Working Conditions Agreement between Western Washington Chapter Western Insulation Contractors Association and Heat and Frost Insulators and Allied Workers Local #7. Where a county has a collective bargaining agreement, L&I adopts its wage and benefits; with more than one, the higher rate prevails. Otherwise L&I uses wage surveys (RCW 39.12.015).

When does this rate change?

Davis-Bacon insulator rates in these counties

The counties share L&I's rates, but not always the same federal wage determination. When a contract requires both the state rate and the Davis-Bacon rate, paying the higher of the two meets both. The contract documents say which apply.

CountyFederal classificationBase + fringeWDvs L&I
Chelan CountyFederal rates listed on the county page; no one-to-one match
Clallam CountyFederal rates listed on the county page; no one-to-one match
Douglas CountyFederal rates listed on the county page; no one-to-one match
Grays Harbor CountyFederal rates listed on the county page; no one-to-one match
Island CountyFederal rates listed on the county page; no one-to-one match
Jefferson CountyFederal rates listed on the county page; no one-to-one match
King CountyFederal rates listed on the county page; no one-to-one match
Kitsap CountyFederal rates listed on the county page; no one-to-one match
Kittitas CountyFederal rates listed on the county page; no one-to-one match
Lewis CountyFederal rates listed on the county page; no one-to-one match
Mason CountyFederal rates listed on the county page; no one-to-one match
Okanogan CountyFederal rates listed on the county page; no one-to-one match
Pacific CountyFederal rates listed on the county page; no one-to-one match
Pierce CountyFederal rates listed on the county page; no one-to-one match
San Juan CountyFederal rates listed on the county page; no one-to-one match
Skagit CountyFederal rates listed on the county page; no one-to-one match
Snohomish CountyFederal rates listed on the county page; no one-to-one match
Thurston CountyFederal rates listed on the county page; no one-to-one match
Whatcom CountyFederal rates listed on the county page; no one-to-one match
Yakima CountyFederal rates listed on the county page; no one-to-one match

Holidays

L&I holiday code 15H:

Holidays: New Year's Day, Memorial Day, Independence Day, Labor Day, Thanksgiving Day, Friday after Thanksgiving Day, Christmas Eve Day, and Christmas Day (8). When the following holidays fall on a Saturday (New Year’s Day, Independence Day, and Christmas Day) the preceding Friday will be considered as the holiday; should they fall on a Sunday, the following Monday shall be considered as the holiday.

How the King County group compares

The main insulator rate in every county that has one, and how the pay splits here and in the nearest counties. All bars use the same scale.

Every county in Washington

$68.80Adams$100.83Chelan
KingNearby: Chelan $100.83, Clallam $100.83, Douglas $100.83, Grays Harbor $100.83, Island $100.83, Jefferson $100.83, Kitsap $100.83, Kittitas $100.83, Lewis $100.83, Mason $100.83, Okanogan $100.83, Pacific $100.83, Pierce $100.83, San Juan $100.83, Skagit $100.83, Snohomish $100.83, Thurston $100.83, Whatcom $100.83, Yakima $100.83Each column is a group of counties with about the same main rate; its height is how many. 0 counties pay more than King, 19 the same, 19 less.

Base wage and fringe benefits, nearby

  1. King County groupbase $81.42$100.83
  2. Pierce Countybase $81.42$100.83
  3. Snohomish Countybase $81.42$100.83
  4. Cowlitz Countybase $62.02$87.79

Which county is in which insulator group

Every Washington county with a insulator rate. Counties L&I treats alike share one page; the rest have their own. You pay the rate for the county where the work is done.

CountiesMain classificationBase wageTotal 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, YakimaJourney Level$81.42 $100.83 
Clark County group, 5 counties: Clark, Cowlitz, Klickitat, Skamania, WahkiakumMechanic$62.02 $87.79 
Spokane County group, 14 counties: Adams, Asotin, Benton, Columbia, Ferry, Franklin, Garfield, Grant, Lincoln, Pend Oreille, Spokane, Stevens, Walla Walla, WhitmanJourney Level$45.81 $68.80 

3 groups of counties with identical L&I rates, and 0 counties with rates of their own.

Washington insulator prevailing wage by county, with a map

More from L&I on this rate

  • Scope of work, WAC 296-127-01303: which tasks this trade covers. L&I says the right classification “depends upon determinations published by L&I” (L&I).
  • L&I's prevailing wage lookup, for any county, trade and bid date
  • Apprentices: registered apprentices are paid L&I's apprentice rate for the trade. Anyone without a registered agreement counts as a journey-level worker (RCW 39.12.021).

Every trade's rates, county by county: Chelan · Clallam · Douglas · Grays Harbor · Island · Jefferson · King · Kitsap · Kittitas · Lewis · Mason · Okanogan · Pacific · Pierce · San Juan · Skagit · Snohomish · Thurston · Whatcom · Yakima

Are you being paid this rate?

Add your wage to what your employer pays into health, pension and other plans for you, and compare it with $100.83. Each contractor files an L&I-approved Statement of Intent to Pay Prevailing Wages before it's paid, and an Affidavit of Wages Paid when the job is accepted (RCW 39.12.040). On contracts over $10,000 the approved intent and L&I's contact details are posted on the job site (RCW 39.12.020).

Source

Washington State Department of Labor & Industries, prevailing wage lookup, Heat & Frost Insulators And Asbestos Workers (HEAF), published August 3, 2026, effective September 2, 2026: secure.lni.wa.gov/wagelookup/. L&I keeps a wage record for each county; for the row this page leads with:

Each figure comes from L&I's lookup and is checked against L&I's CSV export and a second, separate query. How we check · Download every Washington rate as CSV · Report an error