Trichoderma species in Maine homes
The aggressive green colonizer of soaked wood
What this species signals about a building
Trichoderma is a fast, aggressive colonizer of very wet cellulose, common in flood aftermath and chronically wet crawl spaces. Some species are notable for degrading wood and even attacking other fungi — a sign of a mature, wet microbial ecosystem.
Where Maine buildings feed it
Cold humid continental with long winters. Very old housing stock; retrofitted insulation without air sealing creates condensation patterns the original buildings never had.
Read those two paragraphs together and the assessment map draws itself: this organism grows where its moisture requirement is met, and Maine'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
Locate the saturation zone — crawl spaces and post-flood assemblies lead the list — remove colonized materials, dry the structure with verification, and address the bulk-water pathway that created the conditions.
Fast-spreading colonies that begin white and turn vivid green as spores mature, often with a coconut-like odor.
- Ice damming
- Damp stone and rubble foundations
- Winter condensation in tightened old homes
Maine questions
Where does Trichoderma species typically show up in Maine homes?
The organism's requirements don't change by state — it grows where its moisture threshold is met. What changes is where Maine buildings meet that threshold: ice damming Combined with the local housing stock (very old housing stock; retrofitted insulation without air sealing creates condensation patterns the original buildings never had), that's where an assessment should look first.
Does finding Trichoderma species mean something different in ME?
Trichoderma viride appears among the HERTSMI-2 marker species. Its presence in dust at meaningful levels indicates genuinely wet building materials somewhere in the envelope and belongs in the investigate-seriously category. In Maine, 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 Trichoderma species contamination in Maine?
Remediation requirements are set by the contamination, not the species name: locate the saturation zone — crawl spaces and post-flood assemblies lead the list — remove colonized materials, dry the structure with verification, and address the bulk-water pathway that created the conditions. We match Maine households with providers vetted on containment discipline, fine-particle competence, and independent verification — matching is free for households.
FULL SPECIES FILE → Trichoderma species · DUST TESTING IN ME → ERMI & HERTSMI-2 in Maine
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