Why It’s Important to Clean Algae Off Your Roof

August 4, 2023 Published by Leave your thoughts

Green,Moss,And,Algae,On,Slate,Roof,TilesWhy It’s Important to Clean Algae Off Your Roof

A clean and well-maintained roof is essential for the overall health and longevity of a house. It offers protection against the elements while enhancing the curb appeal of the property. However, one common issue that many homeowners face is the growth of algae on their roofs. While it may not seem like a significant concern at first, allowing algae to thrive can lead to various problems that may require costly repairs. In this blog post, we will discuss why it’s important to clean algae off your roof and the potential consequences of neglecting this task.

1. Extends Roof Lifespan

The presence of algae on a roof can considerably reduce its lifespan. Algae, specifically a type called Gloeocapsa magma, feed on the limestone filler present in most asphalt shingles, causing them to deteriorate faster. As the algae grow and spread, they create a dark, moist environment that accelerates the decomposition of the roof’s materials. Routine algae removal ensures that your roof stays in good condition, allowing it to reach its expected lifespan without the need for premature replacement.

2. Preserves Energy Efficiency

Algae not only deteriorates the structural integrity of a roof but can also impact its energy efficiency. When algae cover the surface of the roof, they form a layer that absorbs and retains heat from the sun, leading to increased heat transfer into the attic and subsequently into the home. This results in higher cooling costs during the summer months as your HVAC system works harder to maintain a comfortable indoor temperature. Cleaning algae off your roof helps restore its reflective properties and preserves energy efficiency, saving you money on utility bills.

3. Maintains Aesthetics

Beyond the functional implications, the appearance of algae on your roof can significantly impact the overall aesthetics of your home. Algae growth appears as dark streaks or patches, creating a grimy and unkempt appearance. This not only detracts from your home’s curb appeal but can also lower its value when it comes time to sell. Regularly cleaning algae off your roof ensures that your house maintains its visual appeal, contributing to a positive impression and potential higher resale value.

4. Prevents Damage to Gutters and Downspouts

Algae growth on a roof often extends to the gutters and downspouts. Over time, this can lead to clogged water drainage systems, causing water to overflow. When water overflows, it can seep into the foundation of your home, leading to expensive water damage repairs. Regular roof cleaning not only removes algae from the roof but also prevents its spread to the gutters and downspouts, ensuring proper water flow and preventing potential damage.

5. Reduces Health Hazards

Apart from the structural and financial consequences, the presence of algae on your roof can also pose health hazards for you and your family. Algae produce allergens which can cause respiratory issues, particularly for individuals with asthma or other respiratory conditions. Additionally, the damp environment created by algae growth can invite the growth of mold and mildew, which can lead to respiratory problems and allergic reactions. Regular cleaning of algae off your roof significantly decreases the risks of these health hazards, promoting a safe and healthy living environment.


Maintaining a clean and algae-free roof is crucial for both the longevity of your roof and the well-being of your household. From preserving the structural integrity of the roof to enhancing energy efficiency and maintaining curb appeal, regular algae removal should be an integral part of your home maintenance routine. Don’t neglect this task, as the consequences of allowing algae to thrive can be far-reaching and costly. Invest in professional roof cleaning services or take proactive measures to clean your roof yourself and enjoy the benefits of a clean and algae-free roof.

Got Questions? Let Us Help!

Diamond Roofing, Remodeling & Roof Shampoo has 25 years of experience and is both a family- and locally-owned business. What sets us apart from the competition is that we do roof shampooing and cleaning with eco-friendly products that no one else uses. We also do remodeling and siding! Need your roof shampooed and your windows taken care of? We are your guys. Diamond Roofing, Remodeling & Roof Shampoo is a Minnesota-licensed contractor. We are also a certified roof shampoo contractor and have an A+ rating with the BBB, so don’t hesitate to contact us for a free estimate.

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