Removing Those Ugly Black Streaks on Gutters for Good

If you've spent any time looking at your roof lately, you've probably noticed those stubborn black streaks on gutters that just won't wash away with a standard garden hose. It's a common frustration for homeowners who take pride in their curb appeal. One day your gutters look fine, and the next, it looks like someone took a giant charcoal crayon and drew vertical lines all over the front of your house. These marks are often referred to as "tiger striping," and they are notoriously difficult to remove if you don't know what you're dealing with. ...

May 2, 2026 · 7 min · Anduena Javen