Roof Cleaning Marietta GA

Roof Cleaning Services in Marietta, Georgia

Drive through any established Marietta neighborhood and you will see it on every third or fourth house — dark black streaks running down the roof from ridge to gutter. Those streaks are Gloeocapsa magma, a cyanobacterium that feeds on the limestone filler in asphalt shingles. It is not dirt. It is not tree sap. It is a living organism that is actively eating your roof, and it will not go away on its own. Left untreated, algae colonization shortens shingle lifespan by years while making your home look like it has been neglected.

Rare Earth Ltd provides professional soft wash roof cleaning throughout Marietta and Cobb County. Our low-pressure process kills algae, moss, and lichen at the root without damaging shingles, voiding warranties, or creating the granule loss that high-pressure washing causes. The cleaning is immediate and visible — most homeowners cannot believe the difference when they see one side of their roof cleaned next to the untreated side.

Roof Types We Clean in Marietta

• Architectural asphalt shingles — By far the most common roofing in Marietta. Black streak removal without granule damage. Our treatment is approved by ARMA (Asphalt Roofing Manufacturers Association)
• 3-tab asphalt shingles — Older Marietta homes with traditional 3-tab shingles. Same soft wash process, adjusted for the thinner shingle profile
• Metal roofing — Standing seam and metal panel roofs increasingly common in Marietta. Algae, pollen, and oxidation removed without scratching
• Tile roofing — Concrete and clay tile cleaned to remove moss and algae without cracking tiles
• Cedar shake — Found on custom and luxury homes. Moss and wood-decay fungi removed with gentle methods

Marietta's Roof Algae Problem

Cobb County's combination of 50+ inches of annual rainfall, summer temperatures consistently above 85 degrees, and mature tree canopy creates one of the most active roof algae environments in the Southeast. Neighborhoods near Kennesaw Mountain, along the Chattahoochee, and in the heavily wooded areas of East and West Cobb develop visible algae faster than open-lot properties. Homes with north-facing roof planes that receive little direct sunlight can show significant streaking within 3-4 years of a new roof installation.

Marietta Neighborhoods We Serve

• East Cobb — Indian Hills, Walton, Lassiter, Pope areas
• West Cobb — Kennesaw Mountain, Lost Mountain, Due West
• Marietta Square and historic downtown
• Whitlock Avenue and Dallas Highway corridors
• Johnson Ferry and Lower Roswell Road
• Neighboring Kennesaw, Smyrna, Roswell, and Sandy Springs

Roof Cleaning Extends Roof Life

A typical asphalt shingle roof in Georgia should last 20-25 years. Algae colonization can reduce that to 15-18 years by accelerating granule loss and moisture retention. Professional cleaning every 3-5 years prevents this damage and keeps your roof performing for its full expected lifespan. The cost of periodic cleaning — typically $300-600 for a standard residential roof — is trivial compared to the $8,000-15,000 cost of premature replacement.

Bundled Exterior Cleaning

Combine roof cleaning with house washing, driveway cleaning, and gutter cleaning for complete exterior transformation at bundled pricing. View all Marietta services.