Cladosporium species in Missouri homes
The most common mold on earth, indoors and out
What this species signals about a building
Cladosporium dominates outdoor air in most climates, so its indoor presence is expected at background levels. The signal is pattern: concentrated growth on condensation surfaces — windows, registers, cold corners — points to humidity and thermal-bridge issues rather than bulk leaks.
Where Missouri buildings feed it
Humid continental to subtropical with hot humid summers. Basement condensation and storm-driven envelope damage share the casework.
Read those two paragraphs together and the assessment map draws itself: this organism grows where its moisture requirement is met, and Missouri's climate and housing stock determine where that requirement gets met most often. That intersection — not a generic national checklist — is where instruments should go first.
What remediation requires
Surface cleaning plus environmental correction: improve ventilation, address thermal bridging and window condensation, and control humidity. Recurring growth after cleaning means the condensation driver was not fixed.
Olive-green to brown-black colonies with a suede-like texture, common on surfaces as spotty growth rather than large mats.
- Basement humidity
- Severe storm events
- Foundation movement on expansive clays
Missouri questions
Where does Cladosporium species typically show up in Missouri homes?
The organism's requirements don't change by state — it grows where its moisture threshold is met. What changes is where Missouri buildings meet that threshold: basement humidity Combined with the local housing stock (basement condensation and storm-driven envelope damage share the casework), that's where an assessment should look first.
Does finding Cladosporium species mean something different in MO?
As a predominantly outdoor genus, Cladosporium contributes to the outdoor-species side of indices like ERMI. Elevated indoor growth matters more as a humidity diagnostic than as a water-damage marker, though heavy indoor amplification is still a condition to correct. In Missouri, weigh that signal against the state's dominant moisture drivers — the species tells you about the water, and the local climate tells you where that water most likely came from.
Who handles Cladosporium species contamination in Missouri?
Remediation requirements are set by the contamination, not the species name: surface cleaning plus environmental correction: improve ventilation, address thermal bridging and window condensation, and control humidity. We match Missouri households with providers vetted on containment discipline, fine-particle competence, and independent verification — matching is free for households.
FULL SPECIES FILE → Cladosporium species · DUST TESTING IN MO → ERMI & HERTSMI-2 in Missouri
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