Insulation contractors · Iowa

Diamond Insulation Inc

Name: Diamond Insulation Inc Workplace Safety Data
Creator: PlainSafetyScore
License: https://creativecommons.org/publicdomain/zero/1.0/

Sioux City, IA · ~28 workers · 2 years of OSHA Injury Tracking Application data.

Compiled by PlainSafetyScore · August 25, 2026

C
Average Safety Record: 3.1
Avg TCR: 2.8
Industry avg: 0
Fatalities

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The verdict

Diamond Insulation Inc runs at 109% of its industry's injury rate - about level with the typical Insulation contractors workplace, earning a grade C.

Diamond Insulation Inc: 3.1 TCR = 109% of Insulation contractors BLS 2.8 · 2y Form 300A (see methodology below)

Diamond Insulation Inc safety composite

Diamond Insulation Inc scores strongest on dart rate (safer than 80% of same-industry peers) and weakest on fatalities (safer than 51%), 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).

63/100

Percentile-weighted across 3 of 3 measures

Total Case Rate (TCR): C 3.06 per 100 workers

Safer than 55% of industry peers
DART rate: B 0 per 100 workers

Safer than 80% 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%).

TCR Δ

−6.1

2016→2023

Diamond Insulation Inc injury rate improved

Diamond Insulation Inc's TCR fell 6.1 from 6.1 in 2016 to 0.0 in 2023. Peak filing year was 2016 at 6.1 TCR. In 2023, DART was 0× this establishment's average TCR (severity share of cases).

2016=6.1 · 2023=0.0

OSHA ITA Form 300A scorecard

Establishment book 238310 · Sioux City, IA ABOVE-IND · SMALL

Grade C · TCR 3.1 · 109% of ind

DART 0.0 DART
RANK #2/13
PHOTO Rice Drywall, INC.
BOOK 2y book
INJ 2 inj
SIZE ~28 FTE

Nearest TCR peer: Rice Drywall, INC. (0.0 TCR gap)

Read with this employer → · Industry book → · Iowa employers → · Look up another →

This site

3.1
Rice Drywall,

3.1
Andersen Inter

3.1
Location 26

3.1
Scrufari Const

3.1

What this shows Diamond Insulation Inc averages 3.1 TCR (109% of the Insulation contractors BLS benchmark).

Diamond Insulation Inc TCR series: 2016=6.1 · 2023=0 · BLS 2.8

Where Diamond Insulation Inc falls in its industry

1,613 Insulation contractors establishments

Safer than 55% of graded establishments in this industry, whose median TCR is 3.4.

Grade C

More dangerous than peersSafer than peers

Narrower to Iowa alone (the establishments it most directly competes with for workers and contracts): ranked #2 safest of 13 Insulation contractors employers in Iowa.

Diamond Insulation Inc (28 employees, TCR 3.1) among 29 same-industry peers, split at the industry median of 63 employees and a TCR of 3.4

Diamond Insulation Inc has fewer employees than the Insulation contractors median and a lower 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
2023	0.0	0.0	0	0	0
2016	6.1	3.0	2	0	0

OSHA ITA peer cross-reference

Establishment peer ledger

238310 · IA · Sioux City

1,613 Insulation contractors employers nationwide with a credible TCR · 7,192 rated employers in Iowa with headcount on file · 259 employers in Sioux City, IA · 4 cross-state NAT-TCR peers · 4 cross-state NAT-SIZE peers. Closest matches by relationship code are listed below.

Rel	Establishment	Place	Metric
NAICS-TCR	Rice Drywall, INC.	ALVARADO, TX	3.1 TCR
NAICS-TCR	Andersen Interior Contracting, Inc.	FAIRFIELD, NJ	3.1 TCR
NAICS-TCR	Location 26	MURFREESBORO, TN	3.1 TCR
NAICS-TCR	Scrufari Construction Company, LLC	NIAGARA FALLS, NY	3.1 TCR
STATE-SIZE	IOWA ADMIN	AMES	28 FTE
STATE-SIZE	Pocahontas Warehouse	POCAHONTAS	28 FTE
STATE-SIZE	WCT Crystal Lake	BRITT	28 FTE
STATE-SIZE	BHE - Council Bluff W Broadway (IA001)	COUNCIL BLUFFS	28 FTE
CITY-NEAR	Seaboard Triumph Foods	Sioux City	2,375 FTE
CITY-NEAR	SeaboardTriumph Foods	Sioux City	1,896 FTE
CITY-NEAR	St. Luke's Regional Medical Center	Sioux City	1,201 FTE
CITY-NEAR	Smithfield Packaged Meats Corp	Sioux City	691 FTE
NAT-TCR	ISD #700 Hermantown Community Learning Center	Hermantown, MN	3.1 TCR
NAT-TCR	Wyandot, INC	Marion, OH	3.1 TCR
NAT-TCR	349 East Bodley - Atlantic Track Memphis	Memphis, TN	3.1 TCR
NAT-TCR	NTB-NATI	Troy, OH	3.1 TCR
NAT-SIZE	S&S Pallet Corp	Granite City, IL	28 FTE
NAT-SIZE	Flight - 05	Wetumpka, AL	28 FTE
NAT-SIZE	SOUTHWASTE EMPLOYMENT, LLC- Mansfield	Mansfield, TX	28 FTE
NAT-SIZE	Brookdale Denton North	Denton, TX	28 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: 2023, 2016. 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.