Allergenic Molds
The most common mold category. Causes sneezing, runny nose, and allergic reactions in some people—but typically not harmful to healthy individuals.
Allergenic molds are the most common type found indoors. They release spores into the air that can trigger allergy symptoms like sneezing, watery eyes, coughing, or skin rashes. People with mold allergies or asthma may have stronger reactions. For most healthy people, allergenic molds are more of a nuisance than a danger.
If you have persistent symptoms or respiratory concerns, consult your physician.
Common Allergenic Species
Cladosporium
Olive-green to brown. Found on fabrics, wood, and in HVAC systems.
Aspergillus
Green, fuzzy appearance. Common in dust, insulation, and damp areas.
Alternaria
Dark brown or black spots. Often found in showers, under sinks, and around windows.
Where Mold Can Thrive
Mold can grow anywhere moisture and organic materials are present. Common problem areas include:
Water Damage & Leaks
Areas with water damage or past leaks, including around pipes, windows, and roofs
HVAC Systems
Air handlers, duct interiors, condensation pans, and filters
Hidden Spaces
Attics, crawl spaces, basements, behind walls, under flooring
Porous Materials
Drywall, wallpaper, carpet backing, wood, and other cellulose materials
Prevention Tips
Key Prevention Rule:
Address water damage within 24 hours. Control humidity and fix leaks promptly.
Keep indoor humidity below 50%
Use exhaust fans in bathrooms and kitchens
Fix leaks and water damage promptly
Clean and maintain HVAC systems regularly
Ensure proper ventilation in all rooms
Remove visible mold growth immediately
Explore Other Mold Categories
Pathogenic Molds
Can cause infections in people with weakened immune systems or underlying health conditions.
Learn More →Toxic Molds
Produce mycotoxins that can cause serious health effects even in healthy individuals.
Learn More →Get Clear Answers Today
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