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

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

2 contractors

1. Premium Insulation LLC

   Mammoth Lakes, CA · CSLB #1088148 · as of October 6, 2026
   Active · clear
2. J R Insulation

   Mammoth Lakes, CA · CSLB #1034117 · as of October 6, 2026
   Suspended · bond

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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.