Black streaks on Colonie roofs are a living algae feeding on your shingles — common on shaded rooflines throughout Loudonville and Shaker Heights. We kill it with a shingle-safe soft wash.
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Colonie, NY
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Roof Washing in Colonie
Drive through Loudonville or the older sections of Newtonville and you'll see it on nearly every third roof: dark streaking running down the north-facing slope, usually worse under a canopy of mature maples. That's gloeocapsa magma, a algae that feeds on the limestone filler in asphalt shingles and spreads fastest where shade keeps the roof damp.
Colonie's tree-heavy residential streets — especially around Shaker Heights and the older ranch neighborhoods off Central Ave — create exactly the shaded, slow-drying conditions this algae needs. Add in humid summers pushed up from the Hudson and Mohawk river valleys, and a roof that goes unwashed for five or six years can end up losing shingle granules well before its time.
Pressure washing strips the stains but also strips warranty coverage and granules right along with it. Our ARMA-approved soft wash applies a professional cleaning solution from the ground or ladder, kills the algae on contact, and rinses at low pressure — no foot traffic on brittle shingles, no voided warranty, and streaks that stay gone far longer than a pressure rinse.
Local Conditions
Colonie sits between the Mohawk and Hudson river valleys, and its mature suburban tree canopy — especially in Loudonville and Shaker Heights — keeps rooflines shaded and damp well after a rain. That combination is a near-perfect algae incubator.
Decades-old maples and oaks in Loudonville and Shaker Heights shade north-facing roof slopes for most of the day, slowing dry-out time.
Colonie sits between the Hudson and Mohawk valleys, keeping summer air damp enough for algae to thrive on asphalt shingles.
Many mid-century homes off Central Ave and in Newtonville still carry original or first-replacement shingles now well past the algae-resistant window.
Homes near Albany Shaker Road pick up a fine airborne film that mixes with algae growth, darkening rooflines faster than untreated shingles nearby.
Why It Matters
Killing algae at the root protects shingle granules — the layer that actually shields your roof from UV and weather damage.
ARMA-approved, low-pressure soft wash. No pressure washing, no walking on brittle shingles, no voided manufacturer warranty.
We know which streets — Loudonville, Shaker Heights, the ranch blocks off Central Ave — need extra dwell time because of tree cover.
A streaked roof reads as 'old roof' to buyers and neighbors alike. Cleaning it often looks like a full roof replacement at a fraction of the cost.
See Us In Action
This is what we do every day across the Capital Region. Real homes, real crews, real results. No stock photos, no gimmicks — just a clean job done right.
Our Process
We check shingle condition, flashing, and drainage before quoting so you know exactly what you're paying for.
ARMA-approved solution applied from ladder or ground — never walking on wet or brittle shingles.
Gentle rinse followed by a quick gutter and downspout flush so runoff doesn't clog after the wash.
Real Results
What Customers Say
“I just want to thank Capital Pro for doing such a phenomenal job power washing my house. It's like I have a new house! I would recommend them to anyone. And the workers are there to please you. Cause they care!”
Kathy Valason
Google Review · a month ago
“The guys did a great job and the house looks beautiful. My sister drove by and said the same thing — it looks beautiful. They were so nice to talk to and deal with. I have recommended them to my family and friends.”
Leslie Kaufman
Google Review · 3 weeks ago
“In a state of bereavement we reached out and got an earlier date. When we returned from funeral proceedings the house was impeccable. Even areas we had no time to prep for were done. Nice work for sure. Call them — you won't be disappointed!”
Islah Umar
Google Review · 3 weeks ago
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Neighborhoods We Serve
Colonie FAQ
Nearby Towns We Also Serve
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Homeowner Guides
What roof cleaning actually costs in Albany and the Capital Region, the four things that set the price, and how to tell a real quote from a lowball.
Why Are There Black Streaks on My Roof? (Albany NY Roof Cleaning Guide)Those black streaks on an Albany-area roof are algae, not dirt. What causes them and how soft washing removes them safely.
Soft Wash vs. Pressure Wash: Which Does Your Capital Region Home Need?Soft washing and pressure washing aren't interchangeable. Learn the real differences, which surfaces need which method, and how to avoid costly damage.
Owner Operated
When you call Capital Pro, you talk directly with the owner. Luis and the same local crew that quotes your project show up to do the work—no franchise call center or unknown subcontractors.
