Shreveport Roof Cleaning
Soft-wash roof cleaning for Shreveport, LA. Removes black streaks (gloeocapsa magma), moss, and lichen without damaging shingles. ARMA-compliant. Call (318) 401-2772.
Roof Cleaning Built for Shreveport
Those black streaks running down a Shreveport roof are not dirt and they will not pressure-wash off. They are colonies of gloeocapsa magma, a cyanobacteria that feeds on the limestone filler in modern asphalt shingles and thrives in Louisiana’s humidity. Left alone, the colonies spread one to three feet per year and shorten shingle lifespan by absorbing solar heat the shingle was designed to reflect. Soft-wash chemistry kills the algae at the root and lets the next rainstorm wash the dead growth off, restoring the roof to factory color without ever putting high pressure on the shingles.
The Asphalt Roofing Manufacturers Association (ARMA) explicitly warns against pressure-washing asphalt roofs because high-pressure water strips granules and voids most shingle warranties. Our soft-wash approach uses a 2-3 percent sodium hypochlorite solution applied at fire-hose pressure (less than 100 PSI), the exact method ARMA documents as safe and effective. We never use a turbo nozzle, never use a surface cleaner, and never walk a roof we cannot soft-wash from the eaves with reach extensions.
Shreveport roofs older than 15 years often have heavy north-side staining, especially in shaded neighborhoods like Broadmoor, Highland, and the older parts of South Highlands where mature oaks block direct sunlight. Newer subdivisions in South Shreveport and Stoner Hill see lighter staining but still develop visible streaks within 8 to 10 years thanks to the humidity. A single soft-wash treatment removes years of buildup; a follow-up every 3 to 5 years prevents new colonies from establishing.
Before we mix a drop, we protect what is below the roof. Landscape beds along the drip line get soaked with plain water first, so any solution that runs off is diluted before it ever reaches a root, and we tarp or catch-rinse the mature azaleas and hydrangeas that so many Shreveport homes keep tucked under the eaves. Downspouts get watched during the rinse, and we flush the gutters so the dead algae washing off the shingles does not settle and collect in the troughs. The chemistry we use is the same sodium hypochlorite family the shingle makers point to, cut with a surfactant so it clings to the slope long enough to kill the growth rather than sheeting straight off a steep Shreveport roof.
We work the roof from the eaves and from ladders with reach poles whenever the pitch allows, because every step on an asphalt roof in the Louisiana heat scuffs granules loose, and a hot afternoon shingle is softer and easier to mark than most homeowners realize. On the rare steep or complex roof that has to be walked, we do it early in the day while the shingles are cool and we keep it to a minimum. You get photos of the streaked slopes before we start and the same slopes after, so there is no guessing about what the treatment did, and an honest word on whether a ridge zinc strip is worth it for your particular shade load.
What Shreveport Properties Need to Know
Real conditions on Caddo Parish surfaces and how we approach them.
Why Soft Washing Wins on Shreveport Roofs
Pressure washing strips shingle granules, the colored ceramic-coated mineral that protects the asphalt underneath. Once granules are gone, UV exposure cooks the asphalt and the shingle ages 5 to 10 years overnight. Soft washing leaves every granule in place because the chemistry kills the algae at the root and gravity rinses the dead growth on the next rain.
Black Streaks vs Moss vs Lichen
Each grows differently. Black streaks (gloeocapsa magma) cover whole sections; moss (Bryophyta) grows in thick green patches in shaded valleys and behind chimneys; lichen (algae-fungus symbiosis) attaches as raised crusty spots that resist plain pressure. Our chemistry handles all three but the application sequence differs. We identify each on an quote before pricing.
Shingle Warranty Protection
Most shingle manufacturers (GAF, Owens Corning, CertainTeed, Atlas) explicitly require ARMA-compliant cleaning to keep warranties valid. We document our method (chemistry concentration + pressure rating) on every job invoice so the cleaning record stays in your file if you ever need to file a granule-loss or premature-aging claim.
Recent Shreveport Work
Real jobs from Shreveport homes and businesses across Caddo Parish.
Other Shreveport Services
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Ready to Get Started?
Contact Ark-La-Tex Pressure Pros today for a free, no-obligation quote. We look forward to working with you.
Roof Cleaning Questions
How long does a Shreveport roof cleaning take?
A standard 2,500 sq ft asphalt roof takes 60 to 90 minutes start to finish. Larger homes with multiple roof planes or steep pitches take two to three hours. We work from the eaves with reach poles, and we never walk a steep Shreveport roof if it can be avoided.
Will the chemistry hurt my landscaping?
No. We pre-rinse, tarp, and post-rinse every landscape bed within the perimeter of the house. The chemistry is biodegradable and breaks down within 48 hours. Shreveport homes with mature azaleas under the eaves get extra care because azaleas are sensitive to runoff, so we use a dedicated catch-rinse for those areas.
How often should I have my roof cleaned in Shreveport?
Every 3 to 5 years for asphalt shingles. Heavy shade, north exposure, or older shingles may need closer to 3 years. Sun-exposed roofs in newer Shreveport subdivisions often go 5 to 7 years. We will photograph your roof and tell you honestly which category yours falls in.
Will it kill the algae permanently?
It kills the existing colonies. New spores reach roofs by air every season, so without prevention they will eventually return. We offer an optional zinc-strip installation along the ridge line that releases a slow zinc rinse during rain, which prevents new growth for 5 to 10 years. Ask for a ridge-strip quote on the same quote.
Do you clean tile, metal, and slate roofs in Shreveport?
Yes. Tile and metal roofs use a different chemistry concentration but the soft-wash method is the same. Slate roofs require the gentlest possible approach and we hand-rinse rather than spray. We do not pressure-wash any roof material, because high pressure damages all of them differently.
What about gutters as part of roof cleaning?
We can clean gutters at the same time at a discounted combined rate. Most Shreveport roof-cleaning customers add gutter cleaning because we are already on-site with reach extensions. Gutter cleaning includes scooping, flushing, and downspout flow check.
Why do Shreveport roofs streak black so quickly?
River humidity feeds Gloeocapsa algae, the organism behind the black streaks, almost year-round. Shaded slopes under Shreveport’s mature tree canopy regrow fastest, which is why the north face always streaks first.
Is softwashing safe for older Shreveport shingle roofs?
Safer than any alternative. Low pressure and proper chemistry kill the growth without disturbing granules, which matters most on older shingles that cannot spare aggregate to a pressure wand.
Do you clean metal roofs in Shreveport?
Yes. Metal takes a gentler detergent approach that lifts mildew and pollen film without spotting the finish, and fastener lines get rinsed downhill so water never works under the panels.
How long will a Shreveport roof stay streak-free?
Three to five years on most exposures after a proper softwash, less under heavy shade. The treatment kills the algae colony at the root rather than bleaching the visible streaks.
Do gutters get cleaned with a Shreveport roof wash?
The gutter faces and the streaking down them, yes, since roof runoff is what stained them in the first place. Interior gutter scooping is its own service and we will quote it in the same visit if you want it.
Can you clean the roof without walking on it?
On most Shreveport roofs, yes. We treat and rinse from the eaves and from ladders using reach poles, which keeps foot traffic off the shingles entirely. That matters most in the summer heat, when asphalt shingles soften and mark easily underfoot. Only a steep or unusually cut-up roof needs any walking, and when it does we do it early in the morning while the shingles are cool and firm.
How does the black streaking come off after you treat it?
It does not scrub off on the spot. The soft-wash solution kills the Gloeocapsa algae at the root, and over the following days and the next couple of rains the dead growth breaks down and washes away, taking the streaks with it. Some roofs look dramatically cleaner within an hour, others keep lightening for a week or two. That gradual clearing is the sign the treatment did its job the safe way rather than blasting the shingles.
Is the roof chemistry safe for my Shreveport landscaping?
Yes, when it is handled right, which is the whole job. We pre-soak the beds along the drip line with plain water so any runoff lands already diluted, tarp or catch-rinse the azaleas and hydrangeas that grow under so many Shreveport eaves, and give everything a final rinse when we finish. The solution breaks down within a couple of days. Plants get hurt only when a crew skips the pre-soak and the rinse, and we never skip either.
What does a ridge zinc strip do for a Shreveport roof?
A zinc strip runs along the ridge line and releases a trace of zinc every time it rains, and that trace is enough to slow new algae from taking hold on the slopes below. On a heavily shaded Shreveport roof that streaks back fast, it can stretch the time between full cleanings for years. We will tell you honestly whether your shade load makes it worth the cost or whether a normal cleaning interval covers you fine.
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