Safe Roof Cleaning
Those black streaks on your roof aren't just ugly — they're a bacteria slowly destroying your shingles. We serve St. Charles County and St. Louis County with safe soft wash roof cleaning that won't void your warranty.
The dark streaks you see on roofs across Missouri are caused by a bacteria called Gloeocapsa magma — a UV-resistant algae that spreads shingle to shingle, feeding on the limestone filler in your asphalt shingles. Left untreated it shortens your roof's lifespan significantly and can affect your homeowner's insurance. High-pressure washing will remove the visible stains but blasts away your protective granules in the process — this is why soft washing is the only manufacturer-approved method for roof cleaning.
Why Soft Wash
High-pressure washing on a roof blasts away the protective granules on asphalt shingles — these granules are what give your roof its UV protection and fire resistance. Once they're gone you can't get them back.
Beyond the damage, most shingle manufacturers including GAF, Owens Corning and CertainTeed explicitly state that high-pressure washing voids your warranty. Our soft wash method is specifically listed as the approved cleaning method in their guidelines.
Our low-pressure soft wash solution kills the algae at the root, penetrates the surface, and the results last 2–3x longer than pressure washing because we eliminate the organism rather than just blasting off the visible staining.
The Benefits
Extends roof life — Gloeocapsa magma eats into your shingles over time. Regular cleaning adds years to your roof's lifespan and protects your investment.
Protects home value — A stained roof is the first thing a buyer or appraiser notices. Clean roofs contribute to higher appraisals and faster sales.
Insurance compliance — Some insurance providers in Missouri require homeowners to maintain their roof to keep coverage. A documented cleaning protects your policy.
Lower energy bills — Algae-stained roofs absorb more heat. A clean roof reflects heat more efficiently, reducing cooling costs in Missouri summers.
What We Remove
Gloeocapsa magma bacteria causes the black streaks spreading across Missouri roofs. Our soft wash solution kills it at the root and prevents regrowth.
Moss holds moisture against your shingles causing rot and deterioration. Lichen actually bonds to shingles. Our treatment kills and removes both.
Leaf debris, oxidation, and general weathering stains are removed, restoring your roof's original color and clean appearance.
The Process
Send us photos or we come out — free quote with no obligation. Usually respond within 1 hour.
We protect your landscaping, gutters and any sensitive areas around the home before we begin.
Our low-pressure SH-based solution is applied to the entire roof surface. It dwells and kills the algae, moss and bacteria completely.
Gentle low-pressure rinse removes all organic growth. Results are immediate — your roof looks clean and stays clean 2–3x longer than pressure washing.
Where We Work
Free estimate — fast response — first time customers save 15%!