Why Black Streaks on Your Roof Cost More Than You Think
Those dark streaks creeping down your roof shingles might look like simple dirt or weather staining, but they're actually a living organism slowly destroying your roof—and costing you money in ways you probably haven't considered. The True Cost of Roof Algae When homeowners search for "black streaks on roof removal cost," they're usually focused on the immediate expense of professional cleaning. While understanding treatment costs is important, the hidden expenses of ignoring these dark streaks can dwarf any cleaning bill. The black streaks you see are Gloeocapsa magma—a resilient algae that literally feeds on your asphalt shingles. This organism consumes the limestone filler that manufacturers use to add weight and durability to roofing materials. As it spreads, the algae creates a dark, moisture-retaining layer across your roof surface. This constant moisture retention accelerates the aging process of your shingles. What should be a 25-year roof might need repla...