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

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

2 contractors

1. Air Control Systems INC

   Ontario, CA · CSLB #639003 · as of October 6, 2026
   Active · clear
2. Pro Insulation INC

   Ontario, CA · CSLB #898228 · 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.