How to Remove Algae From Your Roof

The presence of algae on your roofing is not just unsightly however can become a pricey headache. Taking action to remove it is important to decrease its effect and prevent damage to your home. If you have seen algae on your roofing, what should you do now?

The best way to securely and efficiently get rid of algae from your roofing is to employ a professional to carry out a roofing treatment. While it might be appealing to do yourself, roof treatments require unique soft washing equipment and cleansers. Plus, who wants to climb a second-story ladder? In the end, calling a professional is a more reasonable and cost-efficient choice. More on that later on in the post.

This post will cover whatever you require to learn about algae on your roofing system. We will explain what it is, where it originates from, and the preventative measures you must take prior to removing it. We will then get to all the advantages of working with a professional to eliminate the algae.

Gloeocapsa magma is the clinical term for the algae on your roof. While it is technically cyanobacteria and not algae, we refer to it as algae in this post because that is what most people know it as due to its green colour.

As the algae eats the limestone in your shingles, it leaves behind a black residue that streaks down the roofing. If left unattended for enough time, the algae can separate the granules in the shingles and require them to be replaced.

Gloeocapsa lava increased in the southeastern United States in the 1990s. It is believed that this is a result of rising humidity. Around the exact same time, roofing system producers were switching shingle filler from paper and ceramic to a less expensive, but algae-attracting, limestone filler.

Algae is most common in locations that have a cool and moist climate. Because of the environment in the Midwest, these roofing systems hold moisture longer and create a breeding place for algae. Algae colonise where there is an absence of direct sunshine, which is generally the north side of the roof. While it is most typically discovered on shingles, algae can likewise be seen on siding and other areas of a house’s exterior.

Algae spores blow from roofing system to roofing system, through the air, and arrive at your roofing. As more algae lands on the roofing, the dark locations prevent the roofing from reflecting sunlight. This can lead to excess heat on the surface, reducing the roofing’s life time. Ultimately, your roofing system can become so unclean that you might think the shingles need to be changed. Gloeocapsa magma can be neutralised with the proper treatment.


Bleach will neutralise and kill algae off your roofing and get rid of the black streaking. Nevertheless, this includes threats. Bleach is destructive and hazardous to plants and animals. It should be diluted prior to used and plants must be washed down. Also, your home needs a correct place to drain pipes chemicals. Not to mention, treating a roofing requires the use of a ladder.

Due to the variety of risks at play, we do not recommend attempting to deal with a roof yourself.

There are lots of essential advantages to employing an expert to treat your roof. Initially, hiring an insured professional will secure you versus any damage caused to your roof or the worker.

Second, it is likely there are more living organisms on your roofing than simply algae. Gloeocapsa magma has a symbiotic relationship with certain fungi that causes the growth of lichens. A specialist will check and treat the roofing for mould, lichens, and the beginning stages of moss.

Lastly, a specialist will be licensed. They will have access to chemicals that you can not simply get off the shelf at your regional hardware store. Because of that, your roofing system treatment must come with a service warranty.

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