How to Identify and Remove Algae from Your Roof

Roof algae is a common problem for all types of roofs. Dark streaks or patches on your roof not only affect its appearance but also cause other issues. Algae on the roof can trap moisture, accelerate wear, and compromise your roof’s integrity. Identifying and treating roof algae as soon as you notice it is crucial to avoid these problems.

At Kickapoo Roofing, we provide useful insights into your roofing system so you can make informed decisions to maintain your roof’s integrity. In this blog post, we will discuss identifying, treating, and preventing roof algae.

How To Identify Roof Algae

Identifying roof algae is the very first step. The appearance of roof algae can vary depending on the specific problem affecting your roof. It’s important to note that not all black or green streaks on your roof are necessarily algae. Discoloration can also be caused by mold, lichen, or moss. Some of these common types of growths on roofs are:

1. Black Roof Algae

Black roof algae, or gloeocapsa magma, is the most common type of roof algae. It looks like dark streaks on your roof shingles, and people often mistake it for mold or dirt. Black roof algae grow well in damp places, making your roof look old and dirty.

2. Lichen

Lichen is a mix of algae and fungi. It shows up as light green, round spots on your roof. Lichen can be harmful because it sticks tightly to your roof and can damage the shingles.

3. Moss

Moss grows like a thick, green carpet on roofs, especially in shady, wet areas. It holds water against your roof, which can lead to mold growth and damage your shingles.

Regardless of the specific type of growth, any of these issues can negatively affect your roofing system and must be addressed as soon as you notice.

How To Clean Roof Algae

There are a few easy steps you can follow to remove algae from your roofing system: 

1. To remove algae from your roof, start with a simple homemade solution. 

2. Mix equal parts water and household bleach to create an effective roof algae remover. 

3. Next, you will need to apply this mixture to the affected areas of your roof using a hose-end sprayer, being careful not to use high pressure that could damage your shingles.

4. Let the solution sit for about 30 minutes to an hour, giving it time to kill the roof algae. Then, rinse it off gently with water.

Extra Tip: If the homemade bleach solution doesn’t do the trick, you can try a commercial roof algae-removing product. These products are specifically made to remove tough algae growth and are often safer for your roof than homemade solutions.

Some Best-Rated Algae and Moss Roof Cleaners

Here are some of the best-rated algae, moss, and mildew-removing products that you can use to clean algae and other growths from your roof. 

👉 Wash Safe™  Roof Wash

Redihan’s Wash Safe Roof Wash is a cleaning product designed to remove roof algae and other roof stains. This roof algae remover uses oxygen bleach and non-toxic ingredients, which makes it safe for the environment. It’s made to work on different types of roofs and can help get rid of moss, mildew, lichen, and black algae.

👉  Spray & Forget® Revolutionary Roof Cleaner Concentrate

Spray & Forget Revolutionary Roof Cleaner Concentrate is designed to tackle common roof problems like algae, mold, and mildew stains. This roof algae cleaner stands out because it works quickly, showing results in just a few minutes.

The product is a concentrate, which means you’ll need to mix it before use. This roof algae remover doesn’t require scrubbing, you just spray it on, let it do its job, and rinse it with water.

👉  Wet & Forget Concentrate: Moss, Mold, Mildew & Algae Stain Remover

Wet & Forget Concentrate is a cleaner that tackles stains on outdoor surfaces, including roofs. This roof algae remover is designed to be simple to use – you just spray it on and leave it. There’s no need for scrubbing, rinsing, or pressure washing as the product uses rain and wind to clean the roof over time.

Why Algae Loves Your Roof & How To Avoid Algae Growth On Your Roof

Algae often grows back on your roof because of certain conditions that help it thrive. To stop this from happening, you need to make your roof less welcoming for algae. We will briefly have a look at why algae keep coming back on your roof and what you can do about it:

👉 Moisture 

Your roof needs to stay as dry as possible to keep algae away. Think about how you can improve drainage and reduce water pooling on your roof. If you live in an area with frequent rain or humid air, you can consider installing copper or zinc strips on your roof to help prevent algae growth. 

👉 Shade 

Algae love dark, cool spots. If parts of your roof are always in the shade, that’s where you’ll likely see algae pop up. Make sure your roof receives enough sunlight to prevent these unwanted growths. 

👉 Debris 

Collected leaves and debris are another culprit for this growth on your roofing system. They not only take away from your roof’s appearance but also hold moisture and create a perfect place for algae. Make it a habit to clean your roof regularly to avoid algae, mold, and lichen growth.

👉 Poor Ventilation

Improper ventilation in your attic can trap moisture under your roof. This dampness seeps into your shingles, creating a perfect spot for algae. Improving your roof’s airflow can make a big difference.

👉 Trim The Overhanging Branches

If there are trees near your house, they might be providing too much shade and dropping debris on your roof. Consider trimming back overhanging branches to let in more light and reduce debris.

👉 Focus More On North-Facing Slopes

If you have north-facing slopes on your roof, keep an eye on them. These areas get less sunlight naturally, so they’re prime spots for algae. You might need to clean these spots more often.               

👉Replace Damaged Shingles

Finally, check the condition of your shingles. Old or damaged ones can trap water, giving algae exactly what it needs to thrive. If your roofing materials are past their prime, it might be time for a replacement.

Call Kickapoo Roofing For Roofing Services In La Crosse, Wisconsin

If you are looking for reliable roofing services in La Crosse, WI, and the nearby areas, we are here to assist you. At Kickapoo Roofing, we aim to provide top-quality roofing services to homeowners. We are one of the best-rated roofing contractors in Wisconsin, and our commitment to quality is what sets us apart. 

We have a team of dedicated professionals who will completely remove algae and other unwanted growths from your roof. Our experts use safe methods to clean your roof without harming the existing shingles or underlying structure. We understand that a clean roof not only improves your home’s appearance but also extends its lifespan.

In addition to algae removal, we offer a complete range of roofing services, including repairs, replacements, and maintenance. Whether you’re dealing with a minor leak or need a complete roof overhaul, our team has the skills and experience to get the job done right. 

To get a custom quote or for more information, feel free to call us at (608) 352-8688 today. 

Frequently Asked Questions