If you notice black streaks, green patches, or moss growth on your roof, it’s time to schedule a cleaning. Areas like Granite Bay, Rocklin, and Elk Grove often see this buildup due to moisture and shade. Left untreated, moss and algae can cause rot, leaks, and premature aging. Homeowners should have their roofs professionally cleaned every 1–2 years depending on conditions. PeakPrime Exterior Care offers safe, affordable service that gets ahead of costly repairs.