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	Warranty

ALGAE GROWTH

CAUSES
Algae growth causes a dark discoloration on roofs. The algae is usually brown to black in color which results in a streaked, dirty looking rooftop. It can be mistaken for soot, dirt or tree droppings, which typically produce only localized discoloration. It's caused by the growth of airborne algae which deposits on your roof. The good news is that algae growth does not affect the service life of your roofing material. It occurs most often in warm, humid climates such as the Southeast (where algae-resistant shingles are available).

RECOMMENDATIONS
Discoloration of roofs caused by fungus or algae is difficult to remove, but may be lightened by spraying a diluted solution of chlorine bleach, trisodium phosphate, and water onto the roof. Solutions range from one cup TSP, one gallon bleach and four gallons of water, to one cup TSP and 2.5 gallons each of bleach and water. This solution can then be rinsed from the roof in 10 to 15 minutes. Do not scrub. Scrubbing will loosen and remove granules. After spraying be sure to thoroughly flush the roof and the greenery around the home (grass, bushes and shrubs) with water. The effectiveness of this type of cleaning may only be temporary, and the discoloration may recur. High pressure washing is not recommended due to the possibility of removing granules, thereby shortening the life of the Roofing System.

For the average homeowner this process can be difficult and dangerous to do on their own. Again, household and store bought chemicals are only a temporary solution. However, there are alternatives. Working with better cleaning solutions by a certified roof restoration company will undoubtedly return better results. Patton General Contracting* is a certified installer of RoofLock - a product designed to clean and protect your roof from this type of issue. Visit here for more information.

For a more permanent solution, re-roof with Owens Corning Algae-Resistant Shingles. They are specifically designed to inhibit most algae growth for extended periods of time and are backed by our strongest product and algae resistance warranties* available to homeowners.

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Other Issues You May Have

As with any type of work you personally do on your home or in this case inspecting your roof, please use caution and safety equipment. If you do not feel comfortable inspecting your roof or you have trouble knowing what exactly to look for, please feel free to contact us for a free consultation.