Restore Your Roof. Skip the Replacement.
Those dark streaks running down your roof on the north exposure aren’t dirt. They’re a slow-growing algae colony eating into the shingle surface, and every season they’re there, they’re shortening the roof’s lifespan.
We treat them with a soft-wash chemical process. No walking on the slope, no pressure on the shingles, no granule loss, no risk to a manufacturer’s warranty. The cleaning solution neutralizes the colony at the source. The first wash takes off the bulk of the staining; the rest flushes out with the next two rainfalls. Visible streaking is gone inside a week to ten days.
Our detergent is gentler on everything around the house, and the result lasts longer. Every cleaning carries a 3-year warranty. If the streaks come back inside that window, we re-treat at no charge.
We work on every common roofing material in the Richmond market: asphalt, metal, slate, tile, rubber, composite, and wood shake. The black streaking is most often caused by Gloeocapsa magma, a blue-green algae that feeds on the limestone filler in modern asphalt shingles. The science is interesting. The practical effect is that letting it sit costs you years of roof life.
A new asphalt roof in 2026 starts above $15,000. A cleaning runs a fraction of that, and pulls the years back.
