Black Streaked Roof Shingles

Have you ever noticed dark black streaks on roofs?

Roof Stains show up in more places than ever before!  It used to be isolated to only the South Eastern United States, but is now increasingly more common the entire US.  

The Black Stains that form in spots, then streaks, then sheets are the calling card of roof shingle algae (often called roof mold)

Stay tuned as we explore the history and reality of this new element of home cleaning.


  1. June S September 28, 2008
  2. john smith September 29, 2008