Roof Cleaning in Metro Atlanta: How to Get Rid of Black Streaks

Look at the roofs in almost any Metro Atlanta neighborhood and you will see it: dark black streaks running down the shingles. Many people think it is dirt, soot, or just old age. In most cases, it is something else, and it can be cleaned.

Peak Exterior Solutions is a veteran-owned, insured company based in Mableton. We clean roofs across Metro Atlanta using a safe soft wash method, and we back it with a 3-year roof guarantee.

What Causes Black Streaks on Roofs?

It Is Usually Algae

Those black streaks are most often a type of algae known as Gloeocapsa magma. It spreads through the air and settles on roofs. As it grows, it forms a dark coating that protects itself from the sun, which is why it looks black.

Why It Is So Common in Georgia

Algae loves warmth and moisture. Atlanta's humid summers and mild winters give it plenty of time to grow. Roofs that get shade from trees, or that face north, often have the worst streaks.

Moss and Lichen

Along with algae, you may see green moss or crusty lichen, especially in shady spots. These hold moisture against your shingles.

Why You Should Not Ignore Roof Streaks

Curb Appeal

A streaked roof makes a home look older and less cared for. Since the roof is a big part of what people see, cleaning it can make a big difference.

Holding Moisture

Algae, moss, and lichen can trap moisture on the roof. Over time, that is not good for shingles.

Selling Your Home

If you plan to sell, a clean roof helps your home make a better first impression in photos and showings.

Why Pressure Washing a Roof Is a Bad Idea

High pressure can knock granules off asphalt shingles, lift edges, and force water under them. That can shorten the life of your roof. Many shingle makers warn against pressure washing roofs.

The right way to clean a roof is soft washing.

How Our Soft Wash Roof Cleaning Works

Step 1: Inspect

We look over the roof and note problem areas before we begin.

Step 2: Protect

We wet down plants and landscaping around the home and take care around gutters and downspouts.

Step 3: Apply Cleaning Solution

We apply a roof-safe cleaning solution at low pressure. It kills algae, moss, and lichen at the root.

Step 4: Rinse

We rinse gently where needed. Some lingering growth continues to break down and wash away with the next rains.

Step 5: Final Check

We check the results and rinse plants again before we leave.

Our 3-Year Roof Guarantee

We stand behind our work. Our roof cleaning comes with a 3-year roof guarantee. Ask us for the details when you get your quote so you know exactly what is covered.

Pair Roof Cleaning With a House Wash

If your roof has streaks, your siding probably has some growth too. Many homeowners clean both at once. House soft washing starts from $249, and if you book a house wash through November 11, 2026, we will clean your driveway free.

What Our Customers Say

"Did a great job, very professional and my biggest thing was on time. Definitely highly recommend them for services." — Brandon Jackson, 5 stars

Frequently Asked Questions

Will roof cleaning damage my shingles?

Not with soft washing. We use low pressure and a roof-safe solution, so your shingles are not blasted.

How long does a roof cleaning last?

Results depend on shade and weather. That is why we offer a 3-year roof guarantee to back up our work.

Do the black streaks come back?

Algae can return over time, especially on shady roofs. Soft washing kills it at the root, which helps results last.

Do I need to be home for roof cleaning?

No. We just need access to the property and an outdoor water spigot.

Get a Free Roof Cleaning Quote

Ready to get rid of those black streaks? Request your free roof cleaning quote at peakexteriorsolution.com or call (404) 202-5439.