The answer to 'drip edge algae growth' is that algae growth on the drip edge of a roof is a common problem caused by moisture, shade, and organic debris. Symptoms include a green, slimy buildup that can lead to rot and damage if left untreated. The solution often involves cleaning the drip edge and applying a fungicide or algaecide to prevent future growth.
In many cases, homeowners can address minor algae growth on the drip edge themselves by scrubbing the area with a stiff brush and a bleach-based cleaner. However, if the algae problem is widespread or the drip edge is in poor condition, it's best to call in a professional roofing contractor to properly clean, treat, and potentially replace the drip edge to ensure long-term protection.