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 thrive in the damp, shaded environment created by gutter guards, leading to unsightly green or black buildup. This can happen over time as organic matter and moisture accumulate on the guards.
To prevent and address algae growth, it's important to regularly clean and maintain your gutter guards. This may involve removing debris, scrubbing the guards, and ensuring proper drainage. In some cases, replacing the gutter guards or upgrading to a different type may be necessary to improve airflow and sunlight exposure and discourage algae growth.