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 June 27, 2026.

2 contractors

1. Air Control Systems INC

   Ontario, CA · CSLB #639003 · as of June 27, 2026
   Active · clear
2. Pro Insulation INC

   Ontario, CA · CSLB #898228 · as of June 27, 2026
   Active · clear

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Data sourced from the California Contractors State License Board (CSLB), current as of June 27, 2026. IsItLicensed is not affiliated with or endorsed by the CSLB or the State of California. Always verify against the official record.