01
Pre-Service Assessment
We review roof dimensions, pitch, levels, access, growth, runoff paths, landscaping, and visible conditions that cleaning will not repair.
Residential Roof Cleaning
Asphalt Shingle Roof Cleaning in Metro Atlanta
Black streaks and uneven dark sections can make an otherwise serviceable shingle roof look years older than it is. Peak Roof Cleaning uses low-pressure treatments selected for the roof’s condition, the growth present, and the property surrounding it.
Improve your roof’s appearance with a low-pressure treatment tailored
for its condition and surroundings.
Low-Pressure Treatment
Plant Protection Protocol
Clear Written Pricing
Before and after asphalt shingle cleaning. Photo angles vary;
results depend on roof condition.
Why Shingles Stain
Black Roof Streaks Are Usually More Than Surface Dirt
The black streaking commonly seen on Atlanta-area roofs is often associated with an algae called Gloeocapsa magma. It thrives in warm, humid conditions and becomes more noticeable on roof sections that stay shaded or dry slowly.
North-facing slopes, tree-covered areas, and sections with less direct sunlight may stain sooner. Moss and lichen can also develop where moisture remains on the shingles. Not every dark area is mold, so the appearance, location, tree cover, and type of growth all matter.
Conditions that can make staining appear sooner:
North-facing slopes receive less direct sunlight and dry more slowly
Overhanging trees create shade and hold moisture near the roof
Warm, humid weather supports recurring algae growth
Moss and lichen develop where moisture remains on the shingles
Low Pressure. Roof Specific.
How We Clean an Asphalt Shingle Roof
Asphalt shingles should not be blasted like concrete. The cleaning action should come from the treatment—not aggressive water force—and the plan should account for the roof, access, drainage, landscaping, and growth.
02
Plant & Property Protection
Sensitive areas are identified, plants may be pre-wet, and added protection is used where the property layout or runoff requires it.
03
Low-Pressure Treatment
A roof-appropriate soft-wash or specialty treatment is applied at low pressure and adjusted for the surface and type of organic growth.
04
Dwell, Rinse & Review
The treatment is allowed to work. Rinsing and result timing vary by method, then the roof and surrounding property receive a final review.
Cleaning is not roof repair.
It will not replace missing shingles, stop active leaks, repair decking, reverse granule loss, or correct installation problems.
Explore Cleaning MethodsSet the Right Expectation
What Will the Roof Look Like After Cleaning?
The honest answer depends on the growth and treatment. Choose a result type below to see what may improve quickly and what needs time.
Faster Visible Change
Visible Improvement May Begin on the Day of Service
Standard soft washing may improve black algae staining on the day of service. Results and timing depend on roof condition, shade, moisture exposure, and the extent of staining.
- Targets broad black algae streaks
- Existing fading may remain visible
- Old repairs may show color variation
- Granule loss cannot be reversed
Gradual Release
Treated Growth May Remain Visible for a While
Moss and lichen can stay attached after treatment and release gradually as they break down through normal weather exposure. Aggressive scraping is not used just to force an immediate photo.
- Attached material can release slowly
- No aggressive scraping for appearance
- Result timing varies by growth
- Expectations are reviewed before service
Gradual Treatment Path
Gradual Improvement May Continue After Treatment
Citra-Shield may be considered for selected roofs and property conditions when gradual results are acceptable. Suitability, application requirements, and expected timing should be reviewed for the specific roof before service.
- May offer gradual improvement
- Different from same-day soft washing
- Requires clear timing expectations
- Selected for the roof and property
No One-Size-Fits-All Package
The Right Method Depends on the Property
Method selection should account for roof condition, landscaping, organic growth, property layout, and how quickly the homeowner needs to see a result.
May Be Appropriate When:
- Black algae staining is the primary concern
- Faster visible improvement is a priority
- The roof is being cleaned before a listing, review, or HOA follow-up
- The property can be prepared for application and runoff management
May Be Considered When:
- A gradual cleaning process is acceptable
- Property conditions make another approach preferable
- The growth requires a different treatment plan
- The homeowner understands that result timing varies by roof and treatment
The roof and property should drive the recommendation—not a preselected package.
Clear, Roof-Specific Pricing
What Affects the Cost of Shingle Roof Cleaning?
Home square footage does not tell the full story. Two houses with similar footprints can require very different cleaning plans.
Roof Size
Larger surfaces require more preparation, solution, application time, and review.
Roof Pitch
Steeper sections can change access, application methods, and service time.
Number of Levels
A one-story ranch and a high multi-level home require different access plans.
Roof Complexity
Valleys, dormers, additions, and intersecting rooflines add treatment sections.
Type of Growth
Light algae and widespread moss or lichen do not require the same plan.
Access Obstacles
Fences, steep grades, pools, and narrow side yards can affect service access.
Landscaping
Sensitive plantings, water features, and drainage paths may need added protection.
Cleaning Method
Standard soft washing and gradual specialty treatments follow different processes.
Property Location
Travel, site access, and location within the service area may affect the quote.
Get a Quote Based on Your Actual Roof
Enter the property information so pricing can account for the roof instead of relying on a generic per-square-foot guess.
Straight Answers
Asphalt Shingle Roof Cleaning FAQs
No scare tactics and no vague guarantees—just clear answers about treatment, timing, limitations, and what professional cleaning can address.
What causes black streaks on asphalt shingles?
Black roof streaks are commonly associated with an algae called Gloeocapsa magma. It tends to develop in warm, humid conditions and may be more visible on shaded, north-facing, or tree-covered roof sections. A visual review still matters because not every dark area has the same cause.
Are the black streaks mold?
Not necessarily. Black roof staining is frequently algae-related and should not automatically be labeled as mold. Moss, lichen, dirt, roof aging, and other conditions can also change the roof’s appearance.
Do you pressure wash asphalt shingle roofs?
Peak Roof Cleaning uses low-pressure methods for asphalt shingles rather than treating the roof like a concrete surface. The cleaning action comes primarily from the selected treatment—not aggressive water pressure.
Will roof cleaning void my shingle warranty?
Warranty terms vary by manufacturer and product. Roof condition, installation, and cleaning method may affect coverage. Review your warranty and manufacturer-specific cleaning requirements before service when coverage is a concern.
Will all lichen disappear on the day of service?
Not always. Lichen can remain attached after treatment and release gradually as it breaks down. Material that remains visible immediately after service is not necessarily untreated.
How quickly will I see a difference?
A conventional soft wash may improve algae staining on the day of service. Moss and lichen can release more slowly. Gradual treatments, including Citra-Shield when suitable, follow a different timeline. Expected results should be reviewed before service.
Can cleaning make an old roof look new?
Cleaning can remove staining and improve an otherwise serviceable roof’s appearance. It cannot reverse granule loss, fading, mismatched repairs, curling, missing shingles, leaks, storm damage, or normal material aging.
Can cleaning help with an HOA or insurance notice?
Cleaning can address visible staining or organic growth named in a notice, but the HOA or insurer makes the final decision about whether its requirement has been satisfied. Provide the notice when requesting a quote so the concern and deadline can be reviewed.
Should I clean the roof before selling the house?
It may help when dark staining makes the roof look older or less maintained than it is. Cleaning can improve presentation before photos, showings, an appraisal, or a buyer’s review, but it does not replace disclosure or necessary roof repairs.
Is cleaning better than replacing the roof?
They solve different problems. Cleaning addresses staining and organic growth. Replacement addresses a roof that is damaged, failing, or at the end of its serviceable condition. When appearance is the main concern, cleaning may prevent replacement based only on how the roof looks.
See What Your Shingle Roof Cleaning Could Cost
Start with the property address and available roof information. Peak can review the roof, growth, access, and appropriate treatment path before the service is confirmed.
No pressure. No generic per-square-foot guess.
