Commercial is a different job
Why Commercial Mold Work Runs on a Written Protocol
On a commercial property, the cleaner path is an independent assessor first, who documents conditions and writes the protocol the remediator then follows step by step. That separation matters to owners, insurers and attorneys, and some states require it by forbidding one company from both assessing and remediating the same job.
Commercial crews work to IICRC S520, the recognized remediation standard, and to OSHA requirements for respiratory protection and PPE. Engineering controls do the heavy lifting: critical barriers sealing doors, vents and penetrations, HEPA negative air machines exhausting the work zone, and a manometer at the containment wall logging the pressure differential so the building manager can see containment is holding.
Commercial calls cluster around the same sources: ponding water on flat roofs working through the membrane, condensation on chilled-water piping, hotel PTAC sleeves and drain pans, walk-in cooler walls in restaurants and apartment units found moldy at turnover. Each one needs a crew that can work around tenants, guests, students or patients.