Did you know that pressure cleaning can damage your roof and property?

We don’t use any high-pressure.

Our devices and our products are safe for lawns and pets!  The streaks on your roof are a living organism, a Cynobacteria called Gloeocapsa Magma, which is a type of algae.

This is commonly referred to as “fungus or mildew growth” here in Houston, Tx.  The discoloration usually has a brown to black appearance, and may be mistaken for dirt or soot. This algae has tiny root systems that work their way into the pores of your tiles, and wrap around the granules of your shingle roof, weakening fibers and wearing off granules, thus shortening it’s life. They also feed on the organic material found in your shingles. The longer these microbial growths stay on your roof, the more damage they will do.

Why Should I Clean My Roof?

It's a healthier environment for your family, it extends the life of your roof, reduces energy costs, and increases the curb appeal of your home.

Your roof is exposed to the elements all day, every day. Dirt and debris will collect on it. Natural rainfall is typically enough to wash off the appearance of most dirt. However, the dark stains and green areas that appear on your roof are caused by other natural elements:


Algae is a bacterium that feeds off of both asphalt and limestone roofing in moist, cool and shaded areas of the roof. When there is minimal light, GM forms a blue-green color. The more shaded areas of the roof are more likely to have these algae, which can harbor various types of molds. This explains why some roofs are stained only on one side.


Lichens are basically the combination of algae and fungus. ARMA describes lichens as fungus that grow symbiotically with algae. These plant-like organisms form a branching growth of “root-like tentacles that penetrate deep into the shingle’s organic, oil base for nourishment.” Lichens are tough to remove from the roof and can reappear from humidity and rain.


Unlike the algae and lichens, moss is an actual plant. Moss has a shallow root system and requires a lot of moisture to survive. Areas with less sunlight remain damp longer. Overhanging tree branches not only provide more shade, but they also drop debris that serves as a food source for moss. Like algae, moss spores are often transferred by wind or animals and can easily spread throughout neighborhoods.

How Can Stains Damage a Roof?

The stains and growth patches caused by algae, fungus and moss can damage your roof through shingle deterioration and wood rot. Both lead to expensive repairs and can shorten the life of your roof.

As mentioned above, GM algae is a bacterium that feeds off of both asphalt and limestone. That means that these organisms are literally eating away at your shingles. Furthermore, according to ARMA, roofs with algae stains absorb heat. This results in an extremely high heat in the attic, which can reduce the lifespan of the shingles by essentially baking them from the inside out.