Licensed Insulation & Acoustical (C-2) contractors in Stockton, CA

The California Contractors State License Board (CSLB) lists 5 Insulation & Acoustical (C-2) contractors in Stockton, California. Each links to a full dossier with license status, insurance, bond, and enforcement — as of October 6, 2026.

5 contractors

1. Al Kramp Specialties

   Stockton, CA · CSLB #336039 · as of October 6, 2026
   Active · clear
2. R-line Insulation Incorporated

   Stockton, CA · CSLB #1075141 · as of October 6, 2026
   Active · clear
3. Roberts Firestop

   Stockton, CA · CSLB #478057 · as of October 6, 2026
   Active · clear
4. Thermacore Insulation INC

   Stockton, CA · CSLB #1154818 · as of October 6, 2026
   Active · clear
5. Thermo Bay Insulation

   Stockton, CA · CSLB #1030570 · as of October 6, 2026
   Active · clear

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Data sourced from the California Contractors State License Board (CSLB), current as of October 6, 2026. IsItLicensed is not affiliated with or endorsed by the CSLB or the State of California. Always verify against the official record.