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Is Your Marietta Roof Sporting a Green Coat?

green moss growing on the roof tile

As the damp spring starts and the trees leaf out, you may have noticed a green or blackish growth spreading across the shingles of your roof. What you are seeing is likely algae, moss or fungi, and their presence is more than just an aesthetic concern. These organisms can weaken the structure of your Marietta roof, causing damage and potentially costly repairs. An eyesore of a roof also negatively impacts your home’s curb appeal, potentially lowering its value in the eyes of neighbors or buyers.

Is it Algae Growing on My Roof?

Algae, moss and fungi thrive in damp, shaded environments. If your Marietta home is surrounded by trees, these organic invaders may find the moisture and shade they need to grow on your roof. They feed on the organic material found in some roofing materials or by debris that falls from overgrowth. As the organism spreads, it can cause shingles to lift, crack or rot, compromising the integrity of your roof and leaving your home vulnerable to water damage.

Identifying Marietta’s Unwanted Guests

Before taking any action, it is important to understand that different organisms can invade your roof. Algae is typically green or black and appears as streaks or spots on the roof. Moss, on the other hand, is green and forms a thick, velvety mat. Fungi can manifest in various colors and shapes, but often look like black, green or brown patches. This common feature of green coloring is one of the reasons you cannot assume it is moss or algae. Identifying the culprit allows it to be treated properly, using the right materials and methods.

Addressing the Issue Without Damaging Your Roof

As a homeowner in Marietta, it is essential to recognize the signs of these organisms and address them as soon as possible. You might be tempted to grab a ladder and scrub away the growth yourself, but this can cause more harm than good. The wrong chemicals will not take care of the problem, and abrasive brushes or improper pressure washing can damage your shingles and even void your roof’s warranty. Instead, consider hiring a professional pressure washing service experienced in roof cleaning. They have the expertise and equipment to safely remove the growth without causing harm to your roof.

Preventing Future Growth on Your Roof

Once your roof is clean, you will want to prevent the algae, moss or fungi from returning. A professional pressure washing service in Marietta can recommend preventative measures to minimize or prevent recurrence.

Regular roof inspections, cleaning and maintenance can extend the life of your roof and protect your home from costly water damage. Hiring a professional pressure washing service like Alpha Pressure Washing not only ensures the safe and effective removal of the growth but can also keep your roof looking its best. Contact Alpha Pressure Washing today to schedule a consultation and give your Marietta roof the care it deserves.

Posted on behalf of Marietta Pressure Washing

840 Shallowford Rd
Suite 105
Kennesaw, Georgia 30144

Phone: 678-208-1123

Our Customer Reviews

Marietta Pressure Washing


Based on 8 reviews

We recently had our driveway and house pressured washed. We were amazed at the difference when the job was done. The price was more than fair and the job was done very professional. I would recommend this company over any other. They gained a customer for life!!

Rebecca B.

It is great to find a company that understands and offers superior customer service and quality. I used Marietta Pressure Washing for my house siding and driveway. Their prices are reasonable and their work speaks for itself.


I recently engaged Marietta Pressure Washing to pressure wash my home. I found Chris’ work to be extremely professional and top notch. Not only was the work performed in a timely manner, but Chris was very professional in his demeanor. I would recommend him to anyone.

Alan B.

The pressure washing technicians and office staff are fantastic. You can’t beat their prices and the quality was high. I recommend Marietta Pressure Washing to my friends, family, and colleagues.


I just installed new landscaping so I was cautions about hiring someone to pressure wash the windows…they did not damage or step on any of the plants around the house and covered them to protect them from the cleaning. Thank you Marietta Pressure Washing, you do great work.


I am a very satisfied customer of Marietta Pressure Washing. They really know how to deliver on customer service. The crew showed up on time, didn’t step on my plants, and cleaned up after themselves.


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Alpha Pressure Washing
840 Shallowford Rd
Suite 105
Kennesaw, Georgia 30144

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Our Marietta GA pressure washing company serves clients pressure washing needs in Acworth, Canton, Cherokee County, Cobb County, Dallas, East Cobb County, Kennesaw, Mableton, Marietta, Paulding County, Powder Springs, Smyrna, Vinings, Woodstock and the surrounding areas.

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