Insulation contractors · California

Sierra Insulation Contractors

Ontario, CA · ~29 workers · 3 years of OSHA Injury Tracking Application data.

F
Failing Safety Record
11.2
Avg TCR
2.8
Industry avg
0
Fatalities
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The verdict

Sierra Insulation Contractors runs at 399% of its industry's injury rate - far more dangerous than the typical Insulation contractors workplace, earning a grade F.

Sierra Insulation Contractors: 11.2 TCR = 399% of Insulation contractors BLS 2.8 · 3y Form 300A (see methodology below)

Sierra Insulation Contractors safety composite

Sierra Insulation Contractors scores strongest on fatalities (safer than 51% of same-industry peers) and weakest on dart rate (safer than 2%), blended into one 0-100 breakdown against same-industry peers. A missing measure drops out and redistributes its weight rather than deflating the score. This is a per-dimension breakdown, distinct from the single letter grade above it (which weights TCR alone against the BLS industry benchmark).

F

16/100

Percentile-weighted across 3 of 3 measures

Total Case Rate (TCR)
F 11.18 per 100 workers

Safer than 6% of industry peers

DART rate
F 14.76 per 100 workers

Safer than 2% of industry peers

Fatalities
D 0

Safer than 51% of industry peers

Benchmarked live against every credibly-rated employer in the same NAICS industry code in the current OSHA extract (a segment must have at least 8 rated peers to benchmark). Not a legal or compliance determination; PlainSafetyScore's own weighting (TCR 40%, DART 35%, fatalities 25%).

Rising injury rate

Sierra Insulation Contractors: 12.1 → 14.8 TCR

Peak year 2024 @ 14.8 TCR · DART/TCR 1.32× in 2024

Sierra Insulation Contractors's TCR rose 2.7 from 12.1 in 2022 to 14.8 in 2024. In 2024, DART was 1.32× this establishment's average TCR (severity share of cases).

OSHA ITA Form 300A scorecard

Establishment book 238310 · Ontario, CA ABOVE-IND · SMALL

Grade F · TCR 11.2 · 399% of ind

  • DART 14.8 DART
  • RANK #210/228
  • PHOTO Apex Construction Gr…
  • BOOK 3y book
  • INJ 10 inj
  • SIZE ~29 FTE

Nearest TCR peer: Apex Construction Group, Inc. - Union City (0.0 TCR gap)

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Sierra Insulation Contractors in the TCR neighbourhood

Average Total Case Rate among this establishment and nearest same-industry peers

TCR

What this shows Sierra Insulation Contractors averages 11.2 TCR (399% of the Insulation contractors BLS benchmark).

Source U.S. Department of Labor, OSHA Injury Tracking Application (Form 300A) As of 2026-08-25

Sierra Insulation Contractors TCR series: 2022=12.1 · 2023=6.7 · 2024=14.8 · BLS 2.8

Where Sierra Insulation Contractors falls in its industry

1,613 Insulation contractors establishments

Safer than 6% of graded establishments in this industry, whose median TCR is 3.4.

More dangerous than peersSafer than peers

Narrower to California alone (the establishments it most directly competes with for workers and contracts): ranked #210 safest of 228 Insulation contractors employers in California.

Sierra Insulation Contractors (29 employees, TCR 11.2) among 29 same-industry peers, split at the industry median of 63 employees and a TCR of 3.4 2×2 strategic matrix plotting 30 entities by Average employees (X) and Total Case Rate (Y), with a crosshair dividing the plot into four quadrants. Larger & higher-riskSmaller & higher-riskLarger & saferSmaller & safer than peers 0100200300 051015 Average employees Total Case Rate Sierra Insulation Contractors
Sierra Insulation Contractors (29 employees, TCR 11.2) among 29 same-industry peers, split at the industry median of 63 employees and a TCR of 3.4

Sierra Insulation Contractors has fewer employees than the Insulation contractors median and a higher injury rate than the industry's median TCR of 3.4. Workforce size and injury rate do not always move together within the same industry -- some of its smaller peers run higher rates than its larger ones, and vice versa.

Year-by-Year Safety Data

Year TCR DART Injuries Illnesses Fatalities
2024 14.8 14.8 4 0 0
2023 6.7 6.7 2 0 0
2022 12.1 12.1 4 0 0

OSHA ITA peer cross-reference

Establishment peer ledger

238310 · CA · Ontario

1,613 Insulation contractors employers nationwide with a credible TCR · 51,834 rated employers in California with headcount on file · 599 employers in Ontario, CA · 4 cross-state NAT-TCR peers · 4 cross-state NAT-SIZE peers. Closest matches by relationship code are listed below.

Rel Establishment Metric
NAICS-TCR Apex Construction Group, Inc. - Union City 11.2 TCR
NAICS-TCR HWE Stoughton Insulation 11.2 TCR
NAICS-TCR Garland Insulating - Dallas 11.2 TCR
NAICS-TCR Wehmeier Drywall & Painting, Inc. 11.2 TCR
STATE-SIZE Sean V. Doherty Farms 29 FTE
STATE-SIZE Blanco Farms, LLC 29 FTE
STATE-SIZE CONSTRUCTION SUPPORT SHOP 29 FTE
STATE-SIZE Cottonwood Farms 29 FTE
CITY-NEAR Prime Healthcare Services Inc. Location: St. Mary's, Passaic LLC 46-3499370 (HP29) 10,997 FTE
CITY-NEAR CAONA - ONTARIO HUB 4,372 FTE
CITY-NEAR ONTARIO HUB (CAONA) 3,354 FTE
CITY-NEAR Atlantic Solutions Group Inc, Inc. DBA Empire Workforce Solutions 3,240 FTE
NAT-TCR Evansville Care Campus 11.2 TCR
NAT-TCR Mitchell House 11.2 TCR
NAT-TCR Pam'S Auto Inc 11.2 TCR
NAT-TCR 3273 - Tallahassee FL State U 11.2 TCR
NAT-SIZE ACLP Administration Building 29 FTE
NAT-SIZE Wjc-Twc-Twc Wjc -Jacksonville Fl 29 FTE
NAT-SIZE Redwood Falls Runnings 29 FTE
NAT-SIZE Integrity McAlpine Adult Care, LLC 29 FTE

Rel codes: NAICS-TCR · STATE-SIZE · CITY-NEAR · NAT-TCR/NAT-SIZE cross-state. Read with this employer →

Data Source: OSHA Injury Tracking Application (ITA), mandatory establishment-level injury/illness reports. Grades compare employer Total Case Rate (TCR) to BLS IIF industry benchmarks. Data covers years reported by this establishment: 2024, 2023, 2022. This is publicly available government data - not a legal determination of workplace conditions.

Read our methodology - how this data is sourced, computed, and verified.

Data sourced from official public datasets. See our methodology for details.