Birdray

CSLB classification · Insulation

C-2 Insulation and Acoustical Contractor

Installs thermal and acoustic insulation and acoustical materials in buildings.

1,161
Active licences
879
With workers' comp
76%
238
Renewing in 90 days
19
Lapsed or suspended
241
Exempt
9
New in 90 days

Coverages a producer should expect

  • ›Workers' comp
  • ›General liability with products and completed operations
  • ›Pollution where spray foam is used

WCIRB classes usually assigned

  • 5479 Insulation work NOC

Governing class depends on actual operations and payroll. Verify with the WCIRB classification search before quoting.

Carriers writing this class

Policies on file, statewide

  1. State Compensation Insurance Fund185
  2. Insurance Co. Of The West83
  3. Pie Insurance Co.49
  4. Zurich American Insurance Co.46
  5. Everest Premier Insurance Co.35
  6. Travelers Property Casualty Co. Of America25
  7. Old Republic Insurance Co.22
  8. Omaha National Casualty Co.21
  9. Oak River Insurance Co.16
  10. National Liability And Fire Insurance Co.15

C-2 workers' comp renewals by month, California

35
Sep
152
Oct
34
Nov
45
Dec
128
Jan
55
Feb
54
Mar
81
Apr
56
May
72
Jun
69
Jul
56
Aug
5
Sep

Counties with the most

  1. Los Angeles County141
  2. San Diego County95
  3. Orange County94
  4. County72
  5. Riverside County69
  6. Sacramento County65
  7. Alameda County65
  8. San Bernardino County56
  9. Santa Clara County54
  10. Contra Costa County43
  11. Fresno County42
  12. Sonoma County36

Related classes in Insulation

D-65 Weatherization and Energy Conservation

Frequently asked

What does a C-2 licence allow a contractor to do?
Installs thermal and acoustic insulation and acoustical materials in buildings.
What insurance does a C-2 contractor need?
Workers' compensation is required by law once they have employees; the CSLB suspends a licence without it. Beyond that, producers usually place: Workers' comp; General liability with products and completed operations; Pollution where spray foam is used.
How many C-2 contractors are there in California?
1,161 active licences hold the C-2 classification as of 2026-09-06; 879 (76%) have workers' comp on file and 241 are exempt.
When do C-2 workers' comp policies renew?
238 renew within 90 days. October is the peak month.
Which WCIRB class codes apply to C-2 work?
Most often 5479 (Insulation work NOC). The WCIRB assigns the class from the actual operations and payroll, so verify per account in the WCIRB classification search.
Selling to C-2 contractors in California?
Birdray runs signal-timed outbound for one agency per territory: the companies behind these numbers, the person to email, and the renewal date, sent from your inbox. The database is free to search.
How the outbound worksSearch free

Sources: CSLB licence and workers' compensation records, California Secretary of State, OSHA, FMCSA, county permits. Aggregates only; no individual contractor appears on this page. "Active" means a CLEAR licence status. Renewal counts include policies on file with the CSLB expiring in the window. Refreshed weekly; this page as of 2026-09-06. Every field and its source →