Understanding Ganoderma Mold: What Homeowners Should Know
When mold testing is performed, the lab results sometimes reveal molds that most homeowners aren’t familiar with. One such species is Ganoderma, a wood-decaying fungus that can occasionally appear on indoor mold reports. While not as well-known as “black mold,” Ganoderma can still signal important issues in a property that shouldn’t be overlooked.
What Is Ganoderma Mold?
Ganoderma is a type of bracket fungus often seen growing on trees outdoors. In nature, it breaks down wood and helps recycle nutrients back into the soil. Indoors, however, its presence can be a red flag. Because Ganoderma thrives on damp or decaying wood, finding it in a mold test often points to hidden water intrusion and structural wood damage.
How Ganoderma Gets Inside
Ganoderma spores are naturally present in the outdoor environment, but when they settle indoors, they can grow under the right conditions:
- Roof, siding, or window leaks that allow moisture into wood framing.
- Damp attics, crawlspaces, or basements with poor ventilation.
- Water-damaged building materials that were never properly dried or repaired.
Why It Matters
Even though Ganoderma isn’t considered one of the most hazardous molds, it can cause problems such as:
- Structural risks – It feeds on wood, which may weaken framing or supports over time.
- Indoor air concerns – Spores can circulate and contribute to poor indoor air quality.
- Health effects – Sensitive individuals may experience allergy-like symptoms, coughing, or irritation.
What to Do if Ganoderma Appears in Test Results
If Ganoderma is identified in your mold testing report, it’s a sign to look deeper:
- Find and fix the moisture source – Leaks or humidity must be addressed to stop growth.
- Check for wood decay – A professional inspection may uncover hidden structural damage.
- Consider remediation – Damaged materials may need to be removed or treated.
- Retest if needed – Follow-up testing confirms the problem has been fully resolved.
Why Professional Mold Testing Helps
Because Ganoderma is less common and harder to identify by sight, professional mold testing provides clarity. With proper lab analysis, you know exactly what’s present in your home, allowing you to take the right steps before minor issues turn into costly repairs.
PHOTO SOURCE: https://en.wikipedia.org/wiki/Ganoderma_zonatum
