Black streaks on shingles can be a common concern for homeowners, often caused by algae growth that thrives in humid conditions. These unsightly marks not only affect your roof's appearance but can also lead to potential damage if left untreated. Factors such as roof material, climate, and maintenance practices play a significant role in the development of these streaks. Understanding the implications of algae on your shingles, including the costs of cleaning or replacing affected areas, is crucial. Curious about the best ways to tackle this issue? Ask Improvi.ai for personalized guidance!