Black Streaks

Now that the snow has melted, many people have looked up at their roof and noticed a discoloration — or “black streaks”. Just what causes the Black Streaks on your shingles?

The stains are caused by a blue-green algae. The bacteria, called Gloeocapsa magma, was first noticed in the southern part of the United States in the 1990s. It is this bacteria that causes those ugly black streaks. The algae accumulates over time as it feeds on moisture and calcium carbonate.

Most shingles are made with limestone as a filler in the asphalt. Over a period of time, this algae breaks down the roofing by feeding off of the limestone granules embedded in the shingles. The bacteria is airborne, so there really isn’t much that can be done to prevent the algae buildup.

There are a few things that can slow down the build-up…mostly making sure the roofing material doesn’t stay wet for a long period of time. Portions of your roof that are shaded by trees or leaves tend to be more moist and promote the growth of this bacteria. If possible, remove any trees limbs that hang over your roof.

The black streaking does not mean your roof has to be replaced. Many times the algae can be killed and washed off the shingles. Cleaning your roof is much more economical than replacing the entire roof because of the ugly discoloration.

Clean the Black Streaks off your Roof!

High Performance Services can clean your roof! Do not ever use a pressure washer on your roof. It will damage and reduce the life expectancy of the shingles! High Performance Services uses a Soft Wash system that does not harm your roof. Using special detergents, we kill the harmful algae and contaminants that grow on your shingles and stain your roof.

High Performance Services Roof Cleaning can clean every single part of your roof, house or business building. You name it – High Performance Services can do it.

Schedule Your Service Today! Call (231) 299-9296

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