Black roof streaks are commonly caused by algae growing across the roofing surface. Shade, moisture, and debris can help the streaking spread and make the property look older than it is.
What Causes Black Roof Streaks?
A common cause is an algae known as Gloeocapsa magma. It feeds on materials found in many roofing systems and spreads gradually across shaded roof sections.
Are Black Streaks Damaging?
The staining is a sign of organic growth and should be assessed. Moss and lichen can create additional concerns depending on the roof material and condition.
Why You Should Not Pressure Wash a Roof
Aggressive pressure can damage shingles, surface coatings, and other roofing materials. Professional roof cleaning generally relies on a controlled soft-wash process.
How Professional Roof Cleaning Works
A roof-specific cleaning solution is applied with controlled pressure, while surrounding landscaping, metals, runoff, and adjacent surfaces are managed carefully.
Roof Cleaning Across the Central Valley
High Shine assesses shingle, tile, and composite roofs throughout Modesto and surrounding communities before recommending a cleaning scope.