Greater Charleston's Trusted Service
Licensed, insured, and 600+ five-star reviews deep. From Kiawah beachfront homes to downtown storefronts — we bring the same meticulous care to every property.
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5-Star Reviews
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“I knew as soon as the trucks pulled up that this was the right decision to call Peppers. Extremely professional, and extremely quick.”
Johns Island Homeowner
Verified Google Review
Real Charleston Projects
Drag the slider on each image to see the transformation. Every project below is a real roof soft washing job our crew completed across the Lowcountry.
BeforeAfterDrag to compareCassique, Kiawah Island, SC
This luxury estate on Cassique (Kiawah Island) had years of Gloeocapsa magma streaking across its slate roof — the kind of staining most homeowners assume requires a full reroof. Our ARMA-approved sodium hypochlorite soft wash killed the algae at the cellular level and restored the slate to its original tone in a single afternoon, with full landscape protection on every flower bed.
The Problem
Those dark black streaks running down your Charleston roof's north-facing slope are not dirt — they are a living colony of Gloeocapsa magma, a cyanobacteria that feeds on the limestone filler inside asphalt shingles. It is not cosmetic, and pressure washing will not fix it. In the Lowcountry's warm, humid, shaded conditions, the algae spreads a few feet per year and can blanket an entire roof within five summers, shortening shingle lifespan by degrading the protective ceramic granules. The Asphalt Roofing Manufacturers Association (ARMA) endorses soft washing — not pressure washing — as the only approved cleaning method for asphalt shingles. By the time most Charleston homeowners call us, the streaks have been ignored for two or three years and the roof looks ten years older than it actually is. The fix is not a new roof. It is a properly executed soft wash with the right algaecide chemistry. We see this every week in Mount Pleasant, West Ashley, and the neighborhoods under Kiawah's oak canopy. The algae is actively shortening shingle lifespan by degrading the granules that protect the asphalt underneath from UV damage. Letting it continue is the most expensive maintenance decision a Charleston homeowner can make short of ignoring termite damage. Most general pressure washing companies in Charleston do not soft wash roofs correctly. The chemistry has to be calibrated to the algae load, applied at the right concentration, and rinsed with low pressure that doesn't disturb the granules. Pepper's has been refining this protocol for over a decade.
"Untreated roof algae can shorten asphalt shingle lifespan by up to 10 years — soft washing is the single cheapest way to add decades to a roof."
The Peppers Solution
Heavy moss and algae buildup removed with our gentle soft washing process. This roof had years of biological growth that was trapping moisture and damaging shingles.
Treated a 30-year architectural shingle roof plagued by Gloeocapsa magma (black streaks). Used a non-pressure soft-wash solution to kill algae at the root without voiding the shingle warranty. Results visible within 48 hours.
Dark algae streaks completely eliminated with low-pressure soft washing. No damage to shingles, just clean results that last 2-3 years.
How It Works
No pressure, no games — just a simple, transparent process from first call to final walkthrough.
Call us or fill out the form — most quotes come back the same day. No obligation, no pressure, no surprises.
Pick a time that works. Our insured crew arrives on schedule with professional-grade equipment — ready to transform your property.
Walk the property with us when we're done. If anything isn't perfect, we come back the next business day — guaranteed.
Most quotes returned same-day · No obligation
Why Peppers
If you've been staring at ugly black streaks on your roof and wondering whether they'll come off, the answer is yes — but only if the cleaning is done correctly. Roof streaks are caused by gloeocapsa magma, a bacteria-algae that thrives in warm, humid, shaded environments like almost every neighborhood in the Charleston area. From the tree canopies of Wagener Terrace to the maritime forest around Kiawah and Seabrook, our climate gives this organism everything it needs to colonize asphalt shingles and slowly eat through them.
Soft washing is fundamentally different from traditional pressure washing or power washing. Rather than relying on high-pressure force to blast algae off the surface, we apply a low-pressure biocide-based solution that kills the organism at its root. If you have been searching for 'power washing near me' to deal with roof streaks, a soft wash is actually the service you need — standard pressure washing or power washing would strip the protective granules right off your shingles.
It still surprises people to hear this, but pressure washing a roof is one of the fastest ways to destroy it. Asphalt shingles are protected by a layer of ceramic granules bonded to the surface — those granules are what give the shingle its color and its UV resistance. High-pressure water blasts those granules right off, and once they're gone the asphalt below begins to degrade almost immediately. Any reputable shingle manufacturer (GAF, Owens Corning, CertainTeed) will void a warranty if a roof has been pressure washed.
Soft washing is the only correct approach. Endorsed by the Asphalt Roofing Manufacturers Association, soft washing uses a low-pressure application of a cleaning solution — typically a carefully measured sodium hypochlorite blend — that kills the algae at a cellular level. The dead organism is then rinsed away over the next several rainfalls. No mechanical force touches the shingle, so granules stay where they belong. The same low-pressure chemistry-driven approach is what we use for solar panel cleaning and skylight cleaning on roof-mounted glass — high-pressure water voids panel manufacturer warranties, can force water past skylight flashing, and damages shingle granules just the same.
Beyond saving your warranty, a proper soft wash extends roof life dramatically. Independent studies and shingle manufacturer data both suggest that algae growth can cut a typical 25-year architectural shingle's lifespan by as much as a decade. Premature roof replacement is one of the most expensive home repairs you can face — and it's entirely avoidable with routine maintenance. Regular soft washing every 3-5 years is a rounding error by comparison.
Landscape protection is the other thing most homeowners ask about. We pre-wet every flower bed, shrub, and foundation planting before we start, so any drift of cleaning solution is immediately diluted. After the wash we rinse the plants down again with fresh water. When done correctly — which is the only way we do it — soft washing is completely safe for azaleas, camellias, boxwood, and everything else that makes Charleston yards beautiful.
If you can see streaks or moss from the ground, it's time. If you see a line of darkening starting at the edge of a shaded slope, it's time. Most Charleston-area roofs benefit from a soft wash every 3 to 5 years — homes under heavy tree canopy on the east side of the peninsula or on Johns Island may need it more often. We schedule roof cleanings year-round, though we typically avoid days with high winds and do not wash during active rain.
Call or submit a quote request and we'll take a look at recent aerial imagery of your home, give you a ballpark number over the phone, and come out for an on-site look if anything about the pitch or layout needs a closer review. No pressure, no upsell — just an honest assessment of whether your roof needs cleaning now or whether you can wait another season.
The Peppers Difference
Every surface gets the right PSI — no blown-out wood, etched concrete, or stripped paint.
Biodegradable solutions that kill algae and mold without harming your plants, pets, or landscaping.
Most jobs scheduled within 3-5 days. Need it faster? Emergency cleanings available.
Comprehensive liability coverage and workers' comp — you're protected on every job.
Not satisfied? We come back and make it right — no questions, no extra charge.
Locally owned and run — we answer the phone, show up ourselves, and stand behind every job.
Serving the Lowcountry
We offer pressure washing, gutter cleaning, concrete cleaning, and window cleaning across Charleston County, Berkeley County, and Dorchester County.
You're looking at it. Peppers serves every city across Greater Charleston — Mount Pleasant, Kiawah, Johns Island, Summerville, Daniel Island, and 29 more — with the same owner-operator standard on most properties. Same-week scheduling across the metro.
Trusted by Hundreds
Our neighbor scheduled Peppers about 6 months ago and we were very impressed with their results so we scheduled them ourselves. We got our entire house cleaned as well as power washing the driveway. The results were AMAZING! Peppers far exceeded our expectations. The house is cleaner than it has ever been.
Eric Birt
Pressure Washing
Crew was incredibly polite, professional and helpful. Answered all of my questions and were very careful. I highly recommend!
Gabriella Andrews
Pressure Washing
Our neighbor scheduled Peppers about 6 months ago and we were very impressed with their results so we scheduled them ourselves. We got our entire house cleaned as well as power washing the driveway. The results were AMAZING! Peppers far exceeded our expectations. The house is cleaner than it has ever been.
Eric Birt
Pressure Washing
Crew was incredibly polite, professional and helpful. Answered all of my questions and were very careful. I highly recommend!
Gabriella Andrews
Pressure Washing
Kevin and his team were excellent. They arrived as scheduled and Hunter walked the property confirming details regarding areas that needed special attention. They were courteous and thoughtful as they worked around landscaping and the house and property looks pristine!
Katherine O'Hara
Pressure Washing
They are seriously so thorough. First time working with them and I couldn't be more impressed! I called about 10 places to do the work and this place was about $200 cheaper than everywhere else. Well worth it!
Alex Miller
Pressure Washing
Kevin and his team were excellent. They arrived as scheduled and Hunter walked the property confirming details regarding areas that needed special attention. They were courteous and thoughtful as they worked around landscaping and the house and property looks pristine!
Katherine O'Hara
Pressure Washing
They are seriously so thorough. First time working with them and I couldn't be more impressed! I called about 10 places to do the work and this place was about $200 cheaper than everywhere else. Well worth it!
Alex Miller
Pressure Washing
Phenomenal job. Showed up on time, worked efficiently and I don't think my house has ever been so clean. Great work at a fair price and highly recommended.
Patrick
Pressure Washing
The guys did a GREAT job on our soft wash this morning! They also covered our cameras and outlets to make sure those were not exposed. We'll have them back next year for sure!
Brian Rutledge
Roof Soft Washing
Phenomenal job. Showed up on time, worked efficiently and I don't think my house has ever been so clean. Great work at a fair price and highly recommended.
Patrick
Pressure Washing
The guys did a GREAT job on our soft wash this morning! They also covered our cameras and outlets to make sure those were not exposed. We'll have them back next year for sure!
Brian Rutledge
Roof Soft Washing
Questions
Straight answers to the questions Charleston homeowners ask most.
Roof soft washing pricing in Charleston depends on pitch, total roof area, severity of algae, and whether there's moss or lichen in addition to the standard black streaks. A low-pitch single-story ranch with moderate streaking is a very different job from a steep two-story home on Daniel Island with heavy lichen. We quote firm numbers after pulling your roof dimensions — no pricing games. Call 843-480-8113 or request a free quote online for exact pricing tailored to your roof.
For most Charleston-area homes, every 3 to 5 years is ideal. Homes in heavily shaded lots, under oak canopy, or with a lot of overhanging branches often need it every 2-3 years because the humidity and shade accelerate algae growth. If you can already see black streaks from the street, you're overdue. Regular soft washing prevents the staining from becoming permanent and extends your shingle lifespan by years at minimal cost.
The black streaks are gloeocapsa magma — a cyanobacteria that feeds on the limestone filler inside asphalt shingles. It thrives in warm, humid, shaded conditions, which is why Charleston roofs are prime real estate for it. The streaks typically start on north-facing slopes and under trees, then spread a few feet per year. Left alone, it colonizes the full roof within 5-7 years and measurably shortens shingle life. It's not dirt and won't wash off in the rain.
No — properly applied soft washing is the only cleaning method endorsed by ARMA (the Asphalt Roofing Manufacturers Association) specifically because it doesn't damage shingles. Soft washing uses garden-hose level pressure combined with a sodium hypochlorite cleaning solution that kills algae at the cellular level without displacing the ceramic granules that protect the asphalt. What does damage shingles is pressure washing — which we never do on a roof under any circumstances.
Routine roof soft washing is a maintenance task and is not typically covered by homeowners insurance. Insurance covers sudden damage, not gradual algae growth. That said, ignoring algae and eventually needing premature roof replacement can become a claim issue — some insurers in coastal South Carolina have started requiring roof cleanings or will non-renew policies on roofs showing heavy algae. A routine soft wash every few years costs a fraction of what a policy non-renewal or premature reroof would run you. Contact us for a free estimate tailored to your property.
Soft wash is the correct method — full stop. Pressure washing a roof blasts off the ceramic granules that protect asphalt shingles from UV damage, voids your shingle manufacturer warranty, and can drive water under lap seams. Soft washing uses low-pressure application of a biodegradable cleaning solution that kills algae, moss, and lichen without any mechanical impact on the shingle surface. Any company offering to pressure wash your roof should be politely declined.
We use a carefully measured sodium hypochlorite (SH) blend — the same active compound in household bleach, but professionally diluted with surfactants and applied at concentrations matched to the specific algae load. This is the method approved by ARMA and used by reputable roof cleaners nationwide. We pre-wet all landscaping, apply the solution through low-pressure equipment, and rinse thoroughly. The solution breaks down quickly after application and is safe for your roof, gutters, and plants when applied correctly.
No — soft washing using ARMA-approved methods is specifically endorsed as safe by every major shingle manufacturer (GAF, Owens Corning, CertainTeed, Malarkey). What does void warranties is pressure washing the roof, which we never do. If you're concerned, we can provide a job report with the cleaning method documented in case you ever need to reference it for a warranty claim. Many shingle manufacturers actually recommend periodic cleaning as part of proper roof maintenance.
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From the Blog
Tips, case studies, and seasonal guides on roof soft washing and exterior care from our Charleston team.
June 4, 2026
Mildew on siding in Charleston shows up every June when dew points stay above 70°F and your north walls never dry between sunset and sunrise. The real problem isn't the humidity reading at noon; it's the film that condenses at 3 a.m. while algae spores feed on spartina pollen and salt haze. I've soft washed hundreds of Lowcountry homes, and the pattern holds from Wagener Terrace to James Island: north walls under oak canopy turn green first, then covered porches, then east-facing walls.
Read more
May 20, 2026
Pool deck cleaning in Charleston means dealing with algae, mildew, and calcium buildup by April if you skipped maintenance last fall. The surface material decides everything: travertine cracks under pressure that stamped concrete laughs off, and pavers need a completely different approach than either one. I've seen homeowners wreck $15,000 travertine decks in Kiawah trying methods that work fine on their driveway.
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May 13, 2026
Every pressure washing company in Mount Pleasant claims 5-star service, but most reviews mention friendliness and price while ignoring the work that actually protects your home. Real quality happens in the 15-minute pre-wash walk, the PSI adjustments for Old Village cedar versus Carolina Park Hardie plank, and the chemical ratios that keep Shem Creek salt mist from undoing everything in four months. Here's what separates cosmetic cleaning from work that lasts.
Read more
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