What are those black stains on my roof?

Gloeocapsa magma, often referred to as black algae, is a photosynthetic cyanobacteria. It begins as an airborne spore which lands on your roof and then feeds on the moisture and calcium carbonate in your shingles.  This hardy bacteria has  the ability to form a dark pigmented outer sheath to protect it from the sun’s ultraviolet rays.   It also produces a secretion that allows it to stick to the roof surface. This “black algae” has gained notoriety in the Southeastern United States and is spreading at an epidemic rate throughout the Northern Midwest. As the algae colonies accumulate on your roof, it becomes more noticeable as ugly black stains and streaks.

  Why is it there and can it damage my roof?

Rising humidity and temperatures combined with increased bacteria spores promote this widespread condition.

Fiberglass shingles are manufactured with limestone as filler in the asphalt. This material is the perfect food source for algae. These shingles also hold moisture and organic nutrients "bacteria food" longer, especially on the north-side of the roof (where it usually begins to show first).  As a Gloeocapsa magma colony grows; older algae decompose and retain more moisture.  This enables the entire colony to grow even more rapidly causing stains to become heavier and more prominent.

This bacteria causes substantial destruction revolving around shingle decay and loss of reflective power. Over time, Gloeocapsa magma begins to break down the contents of the shingles and this decreases the roof’s ability to reflect ultraviolet rays of light.  The quality of the shingles slowly diminish causing the corners to curl up and form raised humps on the surface. This ultimately can result is broken or disintegrated shingles. In the long run, this has been known to increase air conditioning bills and lead to more frequent roof repair and reconstruction.

As Gloeocapsa magma continues  to grow and spread on your roof, other types of fungi begin to grow  and form called lichens.  Eventually moss may begin to form feeding off the bacteria and it’s moisture.  Roof manufacturer experts conclude that the algae is harmful and if left untreated; will cause premature aging, rotting, and granule loss.

   So how do you get rid of this Black Algae?

At ProWash Roof and Exterior Cleaning LLC, we understand the urgency of cleaning roofs suffering from roof bacteria. Our Safe, Non-pressure roof cleaning methods will effectively remove the roof stains from any asphalt shingle roof.  Our exclusive soft wash roof cleaning service will kill the roof algae but will not harm your roof.

Never allow anyone to pressure wash your roof as it can remove the shingle granules and cause permanent damage.  Our Non-pressure roof washing and shingle treatment method is the only process approved by the Asphalt Roofing Manufacturers Association (ARMA), that will not void your warranty. This includes leading manufacturers Owens Corning and GAF.  ProWash Roof and Exterior Cleaning LLC has the knowledge and skill to give you the best professional roof cleaning solution possible.  Don't replace your ugly shingle roof...  Have it cleaned by ProWash Roof and Exterior Cleaning LLC.

   Any other benefits of cleaning my roof?

Destroying the bacteria growing on your roof can add years back to the life of your shingles and can  save you thousands of dollars!   Removing those ugly black stains adds value and curb appeal to your home or business. Whether you're thinking of selling or just doing some home improvement, ProWash Roof and Exterior Cleaning LLC is a low cost investment that will add thousands of dollars to your home's value.  Your roof will look great again...    We 100% guarantee it!  In most cases, because of our process, the black algae stains will not begin to return for over 5 to 10 years depending on location and climate.

   How much will this cost me?

While each home varies depending on size and roof pitch: One example of the cost of cleaning the entire roof of a 3 bedroom ranch-style single story 1900 sq ft home was $380.00. The cost to replace this roof would of been almost $6,000.00!

   So what do I do next?

Give us a call at 269-588-1512 or send us an email at sales@nodirtyroof.com using our Request Quote Form. We offer a Free No-obligation estimate.  

Please contact us Today.... you'll be glad you did!


Roof Stains Explained

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