Is your roof streaked with black marks or suffering from organic growth? The most common cause of this ugly discoloration is a species of bacteria called Gloeocapsa magma. Once these bacteria have become noticeable, the stains will continue to worsen year to year. As the bacterial colony grows, gravity pulls it downward, resulting in the smear-like stain down roofs. Our professional technicians will safely and effectively treat your roof to return it to its original color and remove all organic growth. Never use a pressure washer on your roof as it certainly will cause damage to your roofing material. Radiant Exterior Pressure Washing has the right equipment to get this job done safely without causing damage to your roofing material. We use garden hose pressure and biodegradable cleaning detergent to return your roof to its original luster. Our cleaning technique is safe and manufacturer approved to kill that bacteria and prolong the lifespan of your roof. We specialize in asphalt shingles, tile, and most metal materials.