The answer to 'why is my gutter guards algae growth' is that algae growth on gutter guards is a common issue caused by moisture, debris, and lack of sunlight. Algae thrives in the damp, shaded conditions often found in gutters and gutter guards. This can lead to clogging, reduced water flow, and unsightly green or black buildup.
To address algae growth, you can try cleaning the gutter guards regularly using a soft-bristle brush and mild detergent. Make sure to clear any debris that may be providing nutrients for the algae. If the problem persists, you may need to consider replacing the gutter guards with a more open-mesh design that allows for better airflow and sunlight exposure. In some cases, professional gutter cleaning and maintenance may be required to fully resolve the issue.