Before Black Roof Stain & Streak Removal After Black Stain & Streak Removal I thought I would write about an unsightly black stain or discoloration that many home owners see on their roof, mostly in areas that do not receive a lot of sun. These black stains or streaks you see is a form of airborne algae called Gloeocapsa Magma. I won't bore you with the specifics about this type of organism, howeve [...]
