How Humidity Affects Roof Algae Growth: Causes and Fixes
Humidity affects roof algae growth by slowing evaporation and extending the wet periods that airborne cyanobacteria need to establish colonies. The common black-streak organism, often identified as Gloeocapsa magma, grows fastest where humid air combines with shade, dew, poor airflow, and porous mineral surfaces. Relative humidity above 60-70% increases risk, but it is not a […]