If you live in Seattle or the surrounding areas, you’ve likely noticed moss growing on rooftops during the damp and rainy seasons. While it may seem harmless, moss can pose a real threat to the health and longevity of your roof. Homeowners often wonder if moss actually causes shingle damage or if it’s just an aesthetic issue. Understanding how moss affects shingles and what steps to take to prevent or remove it is essential for maintaining a safe, durable roof. Why Moss Thriv