Sick Building Syndrome -

When Your Building Makes People Feel Worse

Straight talk on indoor air quality—with mold at the center.

If headaches, irritated eyes, scratchy throats, or “brain fog” flare up inside your building and fade outside, you’re looking at Sick Building Syndrome (SBS). It’s not mysterious, it’s usually stale air, chemical off-gassing, and biological contaminants, especially mold.

What’s driving it?

Indoor Air Quality (IAQ). When ventilation is weak, pollutants stack up:

Chemicals: paints, adhesives, furnishings, cleaners, printer/copier emissions.
Mechanical issues: clogged filters, unbalanced HVAC, poor outside-air intake.
Biologicals: bacteria, dust mites, and mold.

Office environments get hit harder because occupants marinate in the same air for long stretches. More hours, more symptoms, more complaints.

Mold: the usual suspect

Mold spores are everywhere. Give them moisture + time and they colonize on drywall, carpet backing, and insulation often out of sight. Common triggers: slow leaks, window/roof failures, sweating ducts, or high humidity. Some molds release mycotoxins and VOCs that irritate airways and can aggravate allergies and asthma. If you smell “musty,” you have an air-quality problem—not a housekeeping issue.

Why you should care

Health: Prolonged exposure escalates minor irritation into chronic issues.
Cost: Sick days, lower productivity, tenant churn, and pricey fixes.
Risk: Visible water damage plus documented complaints is a legal headache in the making.

Florida owners: rules you can’t dodge

Florida requires licenses for Mold Assessment and Mold Remediation, two different roles.

The assessor can’t perform the remediation on the same project.

Post-Remediation Verification (clearance) must be done by an independent, licensed assessor (often an industrial hygienist).

If a vendor can’t clearly explain compliance, pick another one.

Prevention in one breath

Control moisture, keep indoor RH around 40–55%, maintain and balance ventilation, upgrade and change filters on schedule, and use mold-resistant materials where dampness is likely. After any water event, dry to standard using professional equipment and verify with instruments—not wishful thinking.

Myths to retire

“We sprayed something, so it’s fixed.” Sprays don’t remove colonized material. Source removal + proper drying do.
“If you can’t see it, it’s gone.” Hidden assemblies tell different stories. Moisture mapping matters.
“Crank the AC colder.” Without humidity control, you’ll just drive more condensation—and more mold.

The bottom line

SBS is a building-performance failure with human consequences. Control moisture, ventilate correctly, use licensed Florida pros, and verify results with independent clearance. If your space smells like “old library after a thunderstorm,” don’t normalize it—test, fix, and clear it properly. Your occupants (and your balance sheet) will breathe easier.

Florida Mold Assessor License # MRSA5593

Florida Mold Remediator License #MRSR5593

TeamiDry, LLC

Author: R Wagner, Co-owner TeamiDry, LLC 239-469-9373