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Idaho · Insulator (Heat & Frost / Asbestos Worker)
Idaho insulator prevailing wage, county by county
An insulator's Davis-Bacon prevailing wage in Idaho runs from $21.93 an hour in Washington County to $21.96 in Latah County. The median county is $21.93.
Insulator (Heat & Frost / Asbestos Worker) rate in each Idaho county, A to Z
| County | Base wage | Fringe benefits | Total rate | Effective | Source |
|---|---|---|---|---|---|
Adams CountyINSULATOR - MECHANICAL (DUCT, PIPE & MECHANICAL SYSTEM INSULATION) · Elmore County group | $20.13 | $1.80 | $21.93 | May 18, 2026 | ID20260020 Mod 1 |
Bear Lake CountyINSULATOR - MECHANICAL (DUCT, PIPE & MECHANICAL SYSTEM INSULATION) · Bingham County group | $20.13 | $1.80 | $21.93 | May 18, 2026 | ID20260021 Mod 2 |
Bingham CountyINSULATOR - MECHANICAL (DUCT, PIPE & MECHANICAL SYSTEM INSULATION) · Bingham County group | $20.13 | $1.80 | $21.93 | May 18, 2026 | ID20260021 Mod 2 |
Blaine CountyINSULATOR - MECHANICAL (DUCT, PIPE & MECHANICAL SYSTEM INSULATION) | $20.13 | $1.80 | $21.93 | May 18, 2026 | ID20260009 Mod 2 |
Bonner CountyINSULATOR - MECHANICAL (DUCT, PIPE & MECHANICAL SYSTEM INSULATION) | $20.13 | $1.80 | $21.93 | May 18, 2026 | ID20260010 Mod 1 |
Boundary CountyINSULATOR - MECHANICAL (DUCT, PIPE & MECHANICAL SYSTEM INSULATION) | $20.13 | $1.80 | $21.93 | May 18, 2026 | ID20260011 Mod 1 |
Caribou CountyINSULATOR - MECHANICAL (DUCT, PIPE & MECHANICAL SYSTEM INSULATION) | $20.13 | $1.80 | $21.93 | May 18, 2026 | ID20260013 Mod 2 |
Clark CountyINSULATOR - MECHANICAL (DUCT, PIPE & MECHANICAL SYSTEM INSULATION) · Custer County group | $20.13 | $1.80 | $21.93 | May 18, 2026 | ID20260023 Mod 2 |
Clearwater CountyINSULATOR - MECHANICAL (DUCT, PIPE & MECHANICAL SYSTEM INSULATION) | $20.13 | $1.80 | $21.93 | May 18, 2026 | ID20260014 Mod 1 |
Custer CountyINSULATOR - MECHANICAL (DUCT, PIPE & MECHANICAL SYSTEM INSULATION) · Custer County group | $20.13 | $1.80 | $21.93 | May 18, 2026 | ID20260023 Mod 2 |
Elmore CountyINSULATOR - MECHANICAL (DUCT, PIPE & MECHANICAL SYSTEM INSULATION) · Elmore County group | $20.13 | $1.80 | $21.93 | May 18, 2026 | ID20260020 Mod 1 |
Fremont CountyINSULATOR - MECHANICAL (DUCT, PIPE & MECHANICAL SYSTEM INSULATION) · Bingham County group | $20.13 | $1.80 | $21.93 | May 18, 2026 | ID20260021 Mod 2 |
Idaho CountyASBESTOS WORKER/HEAT & FROST INSULATOR · Idaho County group | $20.13 | $1.80 | $21.93 | May 18, 2026 | ID20260024 Mod 1 |
Latah CountyINSULATOR - MECHANICAL (DUCT, PIPE & MECHANICAL SYSTEM INSULATION) | $20.17 | $1.79 | $21.96 | May 18, 2026 | ID20260015 Mod 1 |
Lemhi CountyINSULATOR - MECHANICAL (DUCT, PIPE & MECHANICAL SYSTEM INSULATION) · Bingham County group | $20.13 | $1.80 | $21.93 | May 18, 2026 | ID20260021 Mod 2 |
Lewis CountyASBESTOS WORKER/HEAT & FROST INSULATOR · Idaho County group | $20.13 | $1.80 | $21.93 | May 18, 2026 | ID20260024 Mod 1 |
Madison CountyINSULATOR - MECHANICAL (DUCT, PIPE & MECHANICAL SYSTEM INSULATION) | $20.13 | $1.80 | $21.93 | May 18, 2026 | ID20260016 Mod 2 |
Minidoka CountyINSULATOR - MECHANICAL (DUCT, PIPE & MECHANICAL SYSTEM INSULATION) | $20.13 | $1.80 | $21.93 | May 18, 2026 | ID20260017 Mod 2 |
Oneida CountyINSULATOR - MECHANICAL (DUCT, PIPE & MECHANICAL SYSTEM INSULATION) · Bingham County group | $20.13 | $1.80 | $21.93 | May 18, 2026 | ID20260021 Mod 2 |
Payette CountyINSULATOR - MECHANICAL (DUCT, PIPE & MECHANICAL SYSTEM INSULATION) · Elmore County group | $20.13 | $1.80 | $21.93 | May 18, 2026 | ID20260020 Mod 1 |
Shoshone CountyINSULATOR - MECHANICAL (DUCT, PIPE & MECHANICAL SYSTEM INSULATION) | $20.13 | $1.80 | $21.93 | May 18, 2026 | ID20260018 Mod 1 |
Teton CountyINSULATOR - MECHANICAL (DUCT, PIPE & MECHANICAL SYSTEM INSULATION) · Bingham County group | $20.13 | $1.80 | $21.93 | May 18, 2026 | ID20260021 Mod 2 |
Twin Falls CountyINSULATOR - MECHANICAL (DUCT, PIPE & MECHANICAL SYSTEM INSULATION) | $20.13 | $1.80 | $21.93 | May 18, 2026 | ID20260019 Mod 2 |
Valley CountyINSULATOR - MECHANICAL (DUCT, PIPE & MECHANICAL SYSTEM INSULATION) · Elmore County group | $20.13 | $1.80 | $21.93 | May 18, 2026 | ID20260020 Mod 1 |
Washington CountyINSULATOR - MECHANICAL (DUCT, PIPE & MECHANICAL SYSTEM INSULATION) · Elmore County group | $20.13 | $1.80 | $21.93 | May 18, 2026 | ID20260020 Mod 1 |
Main insulator classification in each county, Davis-Bacon wage determinations on SAM.gov, as of October 25, 2026. A contract keeps the wage determination in its bid documents. Modifications published before bid opening apply to it, though one published less than 10 days before can be left out if the agency finds there isn't time to tell bidders (29 CFR 1.6(c)). Checked October 25, 2026.
How much does an insulator make on prevailing wage in Idaho?
$21.93 to $21.96 an hour depending on the county; the median county pays $21.93. 4 groups of counties with identical rates and 10 with rates of their own, highest main rate first.
- Latah County1 county$21.96
- Bingham County group6 counties$21.93
- Elmore County group5 counties$21.93
- Custer County group2 counties$21.93
- Idaho County group2 counties$21.93
- Blaine County1 county$21.93
- Bonner County1 county$21.93
- Boundary County1 county$21.93
- Caribou County1 county$21.93
- Clearwater County1 county$21.93
- Madison County1 county$21.93
- Minidoka County1 county$21.93
- Shoshone County1 county$21.93
- Twin Falls County1 county$21.93
Which counties share a rate
| Counties | Main classification | Base wage | Total rate |
|---|---|---|---|
| Latah County | INSULATOR - MECHANICAL (DUCT, PIPE & MECHANICAL SYSTEM INSULATION) | $20.17 | $21.96 |
| Bingham County group, 6 localities: Bear Lake, Bingham, Fremont, Lemhi, Oneida, Teton | INSULATOR - MECHANICAL (DUCT, PIPE & MECHANICAL SYSTEM INSULATION) | $20.13 | $21.93 |
| Elmore County group, 5 localities: Adams, Elmore, Payette, Valley, Washington | INSULATOR - MECHANICAL (DUCT, PIPE & MECHANICAL SYSTEM INSULATION) | $20.13 | $21.93 |
| Custer County group, 2 localities: Clark, Custer | INSULATOR - MECHANICAL (DUCT, PIPE & MECHANICAL SYSTEM INSULATION) | $20.13 | $21.93 |
| Idaho County group, 2 localities: Idaho, Lewis | ASBESTOS WORKER/HEAT & FROST INSULATOR | $20.13 | $21.93 |
| Blaine County | INSULATOR - MECHANICAL (DUCT, PIPE & MECHANICAL SYSTEM INSULATION) | $20.13 | $21.93 |
| Bonner County | INSULATOR - MECHANICAL (DUCT, PIPE & MECHANICAL SYSTEM INSULATION) | $20.13 | $21.93 |
| Boundary County | INSULATOR - MECHANICAL (DUCT, PIPE & MECHANICAL SYSTEM INSULATION) | $20.13 | $21.93 |
| Caribou County | INSULATOR - MECHANICAL (DUCT, PIPE & MECHANICAL SYSTEM INSULATION) | $20.13 | $21.93 |
| Clearwater County | INSULATOR - MECHANICAL (DUCT, PIPE & MECHANICAL SYSTEM INSULATION) | $20.13 | $21.93 |
| Madison County | INSULATOR - MECHANICAL (DUCT, PIPE & MECHANICAL SYSTEM INSULATION) | $20.13 | $21.93 |
| Minidoka County | INSULATOR - MECHANICAL (DUCT, PIPE & MECHANICAL SYSTEM INSULATION) | $20.13 | $21.93 |
| Shoshone County | INSULATOR - MECHANICAL (DUCT, PIPE & MECHANICAL SYSTEM INSULATION) | $20.13 | $21.93 |
| Twin Falls County | INSULATOR - MECHANICAL (DUCT, PIPE & MECHANICAL SYSTEM INSULATION) | $20.13 | $21.93 |
4 groups of counties with identical DOL rates, and 10 counties with rates of their own.
Questions about Idaho insulator pay
What is the insulator prevailing wage in Twin Falls County?
$21.93 an hour: a $20.13 base wage plus $1.80 in fringe benefits, under wage determination ID20260019, modification 2. Overtime and every insulator classification in Twin Falls County.
Does insulator prevailing wage include fringe benefits?
Yes. In Twin Falls County the $21.93 total is a $20.13 base wage plus $1.80 in fringe benefits, about 8% of the total. The employer owes the full amount for every hour worked.
Does insulator prevailing wage pay overtime in Idaho?
Davis-Bacon rates are straight time. On contracts over $100,000, the Contract Work Hours and Safety Standards Act requires 1½ times the basic rate for hours over 40 in a workweek (40 U.S.C. 3702). The fringe is owed for every hour at its straight-time amount.
Do apprentice insulators get this rate?
Davis-Bacon determinations list journeyworker rates. Apprentices in a program registered with DOL or a recognized state agency can be paid the program's percentage of the rate, within its ratio; anyone else gets the full rate (29 CFR 5.5(a)(4)).
Why do some counties have the same insulator rate?
DOL often publishes the same insulator rates for several counties. Across Idaho, the 25 counties with an insulator rate fall into 14 distinct sets of rates, and 4 of those sets are shared by more than one county; the largest covers 6 counties (the Bingham County group).