Identifying Roof Stains (Black Streaks & Mold)

What are the black streaks on my roof?

In San Diego’s coastal climate, those unsightly black streaks on your asphalt shingles or flat tiles aren't just "dirt"—it’s a hardy species of algae called Gloeocapsa Magma. This organism feeds on the limestone filler in your shingles and thrives in our morning marine layer.

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Can moss and algae growth damage my roof?

Left untreated, it turns into a thick layer of organic matter that traps moisture and breaks down your roof's structural integrity.

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The Nomadic Solution:

Can black streaks and mold be removed from roof tiles?

Whether you have the classic San Diego clay tile that grows green mold or flat tiles covered in black streaks, we can restore them. We don't just "wash" the roof; we treat it with manufacturer-approved solutions that kill the algae at the root without damaging the delicate tiles or shingles.