Carrier profile · USDOT 1396146 · Updated Jun 13, 2026

SIERRA INSULATION CO INC

11 power unitsLocal · 1 statesAUBURN, CA100/100
AUTHORITY STATUS UNKNOWN
Verified linkssierrainsulationco.comFMCSA SAFER

Operations & Lanes

Where this carrier actually runs, revealed by roadside-inspection geography over the last 24 months — not where they claim to operate, shown as state-level inspection density.

Operating footprint· revealed by roadside-inspection geography

Operating radiusLocal
revealed
States observed1
US states
Inspections · 24 mo5
CA busiest

Inspection density by state· each tile = a state · shade = inspections, last 24 mo

Home base
AUBURN, CA
2025 AIRPARK CT STE 50
Top corridor
CA
CA 5
Density
fewermore
Shade = roadside inspections, last 24 mo.

State activity ranking· all 1 states · trailing 24 mo

Roadside inspections by state · SIERRA INSULATION CO INC · trailing 24 months
StateCoverageInspections
CACaliforniaHQ5