Black Stains on Roof Tiles | Why They Return & How to Fix It
Black Stains on Roof Tiles | Why They Return & How to Fix It Many homeowners across the Sunshine Coast notice a frustrating problem after cleaning their roof or exterior surfaces: the black stains come back again. You invest time or money into pressure cleaning your roof, driveway or walls, and for a short period everything looks fresh and clean—only for the dark staining to gradually reappear. This is a common issue in Queensland homes, and it is not simply caused by dirt returning. In most cases, the real cause is biological growth that has not been fully treated at its root. Understanding why these stains return is the key to fixing the problem properly and preventing it from happening again. What Are the Black Stains on Roofs and Exterior Surfaces? The black streaks and stains commonly seen on roofs and exterior walls are usually caused by a type of
