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A brighter roof that adds years, not age.
Those black streaks are living algae eating your shingles. We erase them — along with moss and lichen — using the no-pressure method shingle manufacturers actually recommend, before the damage becomes permanent.
- Licensed & Insured
- ★★★★★ Shingle · tile · metal · warranty-safe
Free • No obligation
Free Roof Soft Wash estimate
Tell us about your property — we’ll send a firm quote you can approve online.
We reply within 1 business day. Use code PHENOM7 for 15% off.
What it is
Zero pressure on your shingles
Those black streaks running down your roof aren’t dirt or weathering — they’re a living organism called Gloeocapsa magma, a hardy blue-green algae (cyanobacteria) that thrives in the warm, humid Southeast. Its spores travel on the wind from roof to roof, take hold on the north- and shade-facing slopes first, and feed on the limestone filler baked into your shingles. Roof soft washing uses no high pressure at all — only specialized, roof-safe solutions that kill the algae, moss and lichen down to the root, followed by a gentle rinse. The dark streaks lift almost immediately, and rainfall continues clearing the neutralized growth over the following days as the roof brightens.
Soft washing isn’t just a way to clean a roof — it’s the only appropriate one. High-pressure washing a roof is one of the most damaging mistakes a homeowner can make: it blasts off the protective granules that shield your shingles from UV, forces water up under the courses, and voids virtually every manufacturer warranty. The asphalt-roofing industry (ARMA) and shingle manufacturers specifically endorse low-pressure soft washing as the safe, approved method — for asphalt, tile, metal and wood alike.
Every Roof, Every Texture
Safe on virtually any roofing material
Soft washing is gentle by design, which is exactly why it works across the board. We tailor the solution strength and approach to your specific surface.
Architectural & 3-tab asphalt
The most common roof in Atlanta — and the most prone to Gloeocapsa streaking. Soft washing lifts growth without touching a single granule.
Clay & concrete tile
Porous tile traps moss and lichen in every seam. Low pressure cleans deep without cracking or dislodging tiles.
Metal & standing seam
We clean oxidation, streaking and grime while protecting factory coatings and finishes.
Slate
Brittle and irreplaceable — exactly why high pressure is never an option. Soft washing preserves these premium roofs.
Cedar shake & wood shingle
Cedar requires routine cleaning — moss and trapped moisture rot wood fast. Gentle, scheduled soft washing keeps it dry, breathable and lasting decades longer.
Not sure what you have?
Send your address and we'll identify your roofing material from a bird's-eye review and recommend the right approach — no guesswork.
Why it matters
Every season you wait, it spreads
Gloeocapsa magma doesn’t sit still. It feeds on the limestone filler in your shingles, holds moisture against the roof deck, and releases spores that spread the staining wider — and onto neighboring roofs — the longer it’s left. What starts as a few dark lines on one slope becomes a fully discolored roof, and the granule loss it accelerates is permanent. A neglected roof can fail years before it should.
That’s why black streaking should be addressed as soon as you see it. A stained roof also makes the entire home look older and poorly maintained — it’s one of the first things appraisers, buyers and HOAs flag — and cleaning costs a small fraction of replacing a roof that aged out early.
Bottom line: the streaks are alive and actively shortening your roof's life. Cleaning now protects your property's value and is far cheaper than the premature replacement neglect leads to.
Our Process
How we handle your house soft wash
A clear, careful, repeatable process — because the details are what separate a professional clean from a quick spray-and-go.
1
Roof, material & gutter assessment
We evaluate pitch, roofing material, growth severity and shingle condition, then map out protection for gutters, downspouts and all landscaping below the roofline.
2
Plant & property protection
Greenery is saturated and shielded; vehicles and nearby surfaces are covered under our Plant & Property Protection Program before any solution is applied.
3
Roof sweep & surface prep
We clear leaves, limbs and loose debris from the roof surface first — proper prep so the treatment reaches the shingles evenly and works the way it should.
4
Low-pressure soft-wash treatment
A roof-safe solution is applied evenly from a safe distance — with zero high pressure on your shingles — and dwells just long enough to neutralize algae, moss and lichen at the root.
5
Gentle rinse — instant brightening
The dissolved growth is gently rinsed away and the streaks lift right away; any remaining residue keeps washing clean with rainfall as the roof continues to brighten.
6
Gutter cleaning, downspout flush & final inspection
We finish by cleaning the gutters and flushing the downspouts to confirm proper flow and drainage, then walk the property with you to confirm every slope meets our standard.
What's Included
Everything in your service
No surprises and no upsell pressure — here’s exactly what your roof soft wash covers.
Every roof wash is a 4-in-1 service.
Roof sweep & debris clearing for proper surface prep, the low-pressure soft wash itself, full gutter cleaning, and a downspout flush to confirm drainage — bundled into one visit so your roof and its drainage system come out functioning the way they should.
- Full roof treatment (asphalt, tile, metal, slate or cedar)
- Complete roof sweep & debris removal (surface prep)
- Downspout flushing to confirm proper flow & drainage
- Pre-wash saturation & post-wash rinse of all landscaping
- Black streak (Gloeocapsa), algae, moss & lichen removal
- Gutter cleaning included with every roof wash
- Treatment of north-facing and shaded growth zones
- Expert shingle-condition assessment & QA walkthrough
Ready for a firm quote?
Send us your address and we’ll prepare a clear, no-obligation estimate using a bird’s-eye review of your property — usually with no site visit needed.
The Benefits
Why it's worth it
Removes black streaks
The single biggest visual upgrade you can make to a home from the curb.
Extends roof life
Stops algae from feeding on shingles and trapping damaging moisture.
Protects your warranty
No high pressure means no granule loss and no voided manufacturer warranty.
Boosts whole-home appeal
A clean roof instantly makes the entire property look newer.
HOA & appraisal friendly
Clears one of the most common compliance and inspection flags.
Landscape safe
Everything below the roofline is protected and rinsed during service.
Results & Longevity
Almost-instant results that last
The transformation is one of the most dramatic in exterior cleaning — and it’s built to last.
- Immediate change. The dark streaks lift on the spot, with stubborn growth continuing to clear over the following days as rain finishes the rinse.
- Protects shingle integrity. Removing the algae stops the granule-eating and moisture retention that quietly steal years off your roof.
- Lasts 2–3 years. Most roofs stay clean for two to three years. Heavily shaded, north-facing or tree-covered roofs in our humid climate may benefit from a shorter cycle.
Is it time to replace instead?
Cleaning revives a sound roof — but it can’t fix one that’s worn out. On every visit our team gives you an honest, expert read on shingle condition: granule loss, curling, brittleness, bald spots and soft decking. If your roof is genuinely at the end of its life, we’ll tell you straight — and our team can handle the replacement so you deal with one company, not three.
Complete the Look
Add-ons & seasonal services
Most clients pair their roof soft wash with one of these. Add any of them to your estimate — it’s all handled by one team you already trust.
- Popular with this service
Caulking & Sealant Replenishment
While we’re up top, we inspect and renew the caulking and sealant around flashing, vents, skylights and chimney lines — the small seals that quietly fail and let water in. Cheap insurance against the leaks that cause the most expensive damage.
Roof Replacement
When our assessment shows a roof has reached the end of its life, cleaning won’t bring it back. Our team can handle a full replacement — same trusted crew, no juggling separate contractors.
Custom Container Design
Fresh, pre-planted flower and botanical arrangements delivered to your door every season. Swap tired pots for designer containers timed to spring, summer, fall and winter.
PHENOMLAWN & Landscape
Subscribe to seasonal lawn care — mowing, edging, bed maintenance and seasonal cleanups — so the whole property stays sharp between every wash.
Exterior Painting
When soft washing reveals a surface that is simply past cleaning, our Phenom Pro Services team can repaint and fully restore it — no second vendor needed.
Outdoor Furniture Cleaning
Since we already remove and reposition your furniture to wash, let us clean it too — patio sets, cushions, umbrellas and décor come back fresh and ready to enjoy.
Deck & Fence Staining
Once the wood is clean, lock in the look. Professional stain and seal protects against moisture, UV and wear — and deepens the color beautifully.
Concrete Sealing
Seal pool decks, driveways and patios after cleaning to resist stains, slow algae regrowth and add years of life to the surface.
Curious about bundling or a recurring plan? Just mention it on your estimate request and we’ll build it in.
100%
Satisfaction
Guaranteed
Plant & Property Protection Program
Your whole property, handled with care
Every PhenomWash service is backed by our Plant & Property Protection Program — our promise that your home, your landscaping and everything around it is treated like our own, and our commitment to make it right if it isn’t.
Plants & landscaping protected
We saturate surrounding plants, shrubs and beds before, during and after service, and rinse foliage thoroughly so cleaning solutions are diluted and neutralized — never left to harm your greenery.
Vehicles & valuables shielded
Cars, grills, light fixtures and décor within range of service are moved, covered or carefully avoided so nothing is splashed, stained or damaged.
Surfaces matched to method
We match pressure and solution to each material — soft washing anything delicate — so surfaces are never etched, stripped or marred.
100% satisfaction guarantee
Every job ends with a quality-assurance walkthrough. If any area doesn't meet our standard — or yours — we come back and make it right at no additional cost.
Good to Know
Roof Soft Wash FAQs
They're Gloeocapsa magma — a living blue-green algae that feeds on the limestone filler in your shingles and traps moisture against the roof. It spreads by airborne spores, which is why it shows up on shaded slopes first and migrates from house to house. It's not just cosmetic; it actively shortens your roof's life, so it's best removed as soon as it appears.
High pressure strips the protective granules off shingles, can force water underneath and voids most warranties. We never high-pressure a roof — low-pressure soft washing is the only method roofing manufacturers and ARMA actually recommend.
Yes — and cedar especially needs it. Wood roofs hold moisture and grow moss readily, which rots the shake from the surface down. Routine, gentle soft washing keeps cedar dry, breathable and lasting decades longer. High pressure would shred it, so soft washing is the only safe option.
If the shingles are sound and just stained, cleaning restores them beautifully. If we find heavy granule loss, curling, brittleness, bald spots or soft decking, the roof may be at the end of its life — and we'll tell you honestly. Our team can handle replacement too, so you're never sent to chase down another contractor.
Most streaks lift right away, with stubborn growth clearing over the following days as rainfall finishes the rinse. A clean roof typically stays that way two to three years — sooner for heavily shaded, north-facing or tree-covered roofs in our humid climate.
Yes. Full landscape protection is part of every roof wash through our Plant & Property Protection Program — we saturate and rinse all greenery below the roofline so solutions are diluted and neutralized.
Explore More
Our other services
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