Those unattractive black roof “stains” are actually an organic growth of algae. Unless the algae growth is properly and thoroughly removed, it will multiply and spread, and can shave years off of a roof’s life through premature deterioration of shingles.
We use a process called “non-pressure roof cleaning” or “soft washing”. This is a process that eliminates the risk of damage to your roof often associated with old, high pressure methods. A specialized detergent, or “algaecide” is gently applied to the roof shingles and allowed to dwell, attacking and killing the algae which is feeding on your shingle and creating unsightly dark streaks and stains. As the algaecide is working, the algae will break up and die revealing a clean, “like new” roof!