Those black streaks on your shingles are Gloeocapsa magma, an algae that feeds on the limestone in your roof and shortens its life. Our no-pressure soft wash treatment kills it at the source, clears moss and lichen, and can add years to a roof that looked ready for replacement. Clean Stream Pro Wash quotes every job free within 24 to 48 hours, anywhere in Grand Rapids and West Michigan.
At a Glance
Results last 3 to 5 years
- Asphalt shingle roofs
- Metal, cedar, and tile
- Moss and lichen removal
- Zero pressure on shingles
- Gutters cleared of debris after
What’s Included
Roof Assessment
Condition, material, and growth checked before anything is sprayed.
Soft Wash Application
Manufacturer-approved solution applied at zero pressure kills algae at the source.
Moss & Lichen Treatment
Established growth treated and released without tearing shingles.
Controlled Rinse
Landscaping and gutters protected while the roof rinses clean.
Cleanup & Photos
Debris cleared, before-and-after photos sent to your phone.
The Difference Roof Washing Makes
Before We Arrive
- Black algae streaks down every slope
- Moss clumps on the shaded side
- Lichen crust taking hold
- A roof that looks ready to replace
When We Leave
- Uniform, streak-free shingles
- Algae killed, not just knocked off
- Years added to your roof’s life
- A house that looks newly roofed
How Does No-Pressure Roof Washing Work?
We apply a specialized cleaning solution to the roof at garden-hose pressure, let it kill the algae, moss, and lichen at the root, and let rain do the final rinse. No pressure washer ever touches the shingles, so no granules are stripped and no seals are broken.
This is the method shingle manufacturers themselves endorse: the Asphalt Roofing Manufacturers Association’s technical bulletin recommends a solution-based cleaning and states that high-pressure washing systems should not be used on shingles. It is the only way Clean Stream Pro Wash will clean a roof. The streaks fade as the treatment works, and heavier moss releases over the following weeks. Because the growth dies at the root instead of being shaved off the top, a soft-washed roof stays clean for years, not months.
What Happens if You Leave Black Streaks on a Roof?
Those streaks are a living algae that feeds on the limestone filler in your shingles. Left alone, it spreads across the roof, holds moisture against the surface, and shortens shingle life. Moss is worse: its roots lift shingle edges and open the roof to water.
In West Michigan’s damp climate, a streaked roof rarely stays mildly streaked. Cleaning early costs a fraction of replacing shingles that were eaten years ahead of schedule, and insurers increasingly photograph roofs when renewing policies. If the rest of the exterior needs attention, a house wash at the same visit gets the whole home matching.
Frequently Asked Questions
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Serving Grand Rapids and 20 West Michigan communities, from Holland to Hastings.