Windoor Building Supply is an active interstate carrier based in Mullins, SC.
No insurance filings on record.
View on FMCSA L&I| Vehicle Type | Owned | Term Leased | Trip Leased |
|---|---|---|---|
| Straight Trucks | 5 | 0 | 0 |
| Tractors | 3 | 0 | 0 |
| Trailers | 3 | 0 | 0 |
| Total Power Units | 8 | ||
Distinct vehicles · 24 mo
vs 8 self-reported (MCS-150)
Top makes
Registered in
Higher values = more violations. 0 = clean record.
| Category | Insp w/ Viol |
|---|
| Category | vs. Cohort | vs. State | Reading |
|---|---|---|---|
| Unsafe Driving | 0% | 0% | Better than most peers |
| HOS Compliance | 0% | 0% | Better than most peers |
| Driver Fitness | 0% | 0% | Better than most peers |
| Controlled Substances | 0% | 0% | Better than most peers |
| Vehicle Maintenance | 65% | 85% | Around peer average |
Lower percentile = lower SMS measure = stronger safety record. Computed nightly across active carriers in the same state and fleet-size band.
| Type | Inspections | OOS | OOS % | Nat'l Avg |
|---|---|---|---|---|
| Driver | 0 | 0 | — | 6.67% |
| Vehicle | 0 | 0 | — | 22.26% |
| Hazmat | 0 | 0 | — |
| Period | Fatalities | Injuries | Tow-away | Total |
|---|---|---|---|---|
| No crashes recorded | 0 | 0 | 0 | 0 |
Most-cited violation codes
| BASIC Category | Total | Severe | OOS |
|---|---|---|---|
| Vehicle Maintenance | 7 | 2 | 0 |
| Date | State | Vehicle | Violations | OOS |
|---|---|---|---|---|
| Mar 10, 2026 | NC | TRUCK TRACTOR | 0 | 0 |
| Mar 3, 2026 | SC | TRUCK TRACTOR | 0 | 0 |
| Feb 16, 2026 | SC | TRUCK TRACTOR | 1 | 0 |
| Dec 9, 2025 | SC | TRUCK TRACTOR | 1 | 0 |
| Nov 5, 2025 |
| Measure |
|---|
| Alert |
|---|
| Unsafe Driving | 0 | 0.00 | — |
| HOS Compliance | 0 | 0.00 | — |
| Vehicle Maintenance | 4 | 4.46 | — |
| Driver Fitness | 0 | 0.00 | — |
| Controlled Substances | 0 | 0.00 | — |
| 4.44% |
Where they run
Inspected in 2 states. Top state SC accounts for 73% of activity. Activity outside home state (SC): 27%.
| NC |
| TRUCK TRACTOR |
| 0 |
| 0 |
| Sep 24, 2025 | SC | TRUCK TRACTOR | 0 | 0 |
| Aug 21, 2025 | NC | TRUCK TRACTOR | 4 | 0 |
| Aug 19, 2025 | SC | TRUCK TRACTOR | 1 | 0 |
| Aug 2, 2025 | SC | TRUCK TRACTOR | 0 | 0 |
| Jun 16, 2025 | SC | TRUCK TRACTOR | 0 | 0 |
| Date | Code | Description | BASIC | OOS |
|---|---|---|---|---|
| Feb 16, 2026 | 39395A4EEUS | Emergency Equipment - Fire Extinguishers - unsecured | Vehicle Maintenance | — |
| Dec 9, 2025 | 39345DB | Air Brake - Audible air leak at a proper connection | Vehicle Maintenance | — |
| Aug 21, 2025 | 39325F | Stop lamp violations | Vehicle Maintenance | — |
| Aug 21, 2025 | 3939 | Inoperable Required Lamp | Vehicle Maintenance | — |
| Aug 21, 2025 | 3939H | Inoperable head lamps | Vehicle Maintenance | — |
| Aug 21, 2025 | 3963A1 | Inspection repair and maintenance of parts and accessories | Vehicle Maintenance | — |
| Aug 19, 2025 | 39345DB | Air Brake - Audible air leak at a proper connection | Vehicle Maintenance | — |