Closing the building is rarely an option
A commercial mold problem arrives with a schedule attached. Staff are asking questions, a tenant has put something in writing, a landlord and a lease are involved, and the building has to keep operating through all of it. An assessment designed for an empty house does not survive contact with any of that, and the parts that go wrong are usually logistical rather than technical.
Sampling a building that has to stay open
Three things make commercial work different, and none of them is the science.
The first is that occupancy changes the readings. A hundred people, a door cycling every few seconds and a kitchen running will move humidity, particle counts and pressure relationships in ways an empty building does not. Where the question is what the occupants are actually exposed to, sampling has to happen during trading. Where the question is whether a particular void or zone holds a source, it has to happen when the building is quiet. Most jobs need both, and deciding which is which before anyone arrives is most of the planning.
The second is zones rather than rooms. A commercial building is a set of air handling systems, and each one is effectively a separate building for these purposes. Sampling by room in a building with four rooftop units produces a great many readings of four air masses. Sampling by zone, with a control per zone where the intakes differ, produces an answer. It is also what keeps the cost sane, because zone count rather than floor area is what drives the work.
The third is that people are going to ask what it means. Staff, tenants and sometimes a union or a regulator. So the report is written to be circulated: what was sampled, when, against what control, what was found, and what is and is not established by it. We do not make health findings and we say so explicitly, because a report that overstates its reach is worse than no report when it reaches somebody who knows the difference.

What the job covers in Fort Lauderdale
What we cover
Occupied commercial premises: offices, retail units, restaurants, clinics, schools and multi-tenant buildings, assessed by air handling zone rather than by room.
What you get
A zone-by-zone report with the moisture sources identified, laboratory results against outdoor controls, and a scope of work that can be phased around continued occupation.
Decision point
How much has to be done at once and how much can be phased. That is a commercial question as much as a technical one and the report is written to support it.