For years, roof discoloration caused by algae has been observed throughout the United States and Canada. The discoloration generally has a brown to black appearance, and may be misinterpreted for fungus growth, soot, dirt, moss, or tree droppings.
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Gloeocapsa magma is probably the most prevalent of a number of algae types that contribute to discoloration. All varieties are carried with the air, and have a tendency to gather and expand upon roofing structures. Natural pigments created by these algae may trigger a white or light tinted roof to progressively turn dark brown or black. Discoloration might appear as regular discolorations or streaks. The algae stains should not be mistaken for moss or tree sap, which typically produce only local stains.
This type of roof discoloration has been most widespread in the Gulf States, particularly Naples Park and along the Northwest and Eastern Seaboards. It is not, however, confined exclusively to these areas.
Algae development occurs to varying levels in all regions of the nation, especially those subjected to warm, humid climates. It must be noted that almost all kinds of roofing systems are vulnerable to algae discoloration. It is, of course, most obviously visible on light colored asphalt shingle roofs, while it is not so noticeable on darker tones of roofing. Algae discolorations are challenging to eliminate from roofing surface areas, yet might be lightened by applying a solution of liquid regular household chlorine bleach (sodium hypochlorite) and water. Instructions for mixing solutions of these active ingredients may vary between shingle producers and depend upon the extent of discoloration.
A normal recipe should be one part chlorine bleach and one part water. Various other cleansing chemicals or approaches must not be made use of without approval of the tile maker. To start, delicately disperse this formula on the roof covering surface. Please use typical safety measures for handling bleach including eye goggles and rubber gloves. Please call us for how to clean mold from roof help.
Be sure to use it thoroughly to avoid damages to other parts of the structure and the surrounding landscape. Prevent scrubbing the surface, as this friction might loosen and get rid of roof granules. Preferably, always apply this solution from a ladder and/or scaffolding to prevent direct contact with the roof surface. Observe all recommended safety and security preventative measures when dealing with or near the roof. The solution should be left on the roof for at the very least 15 minutes but also for no more than 20 mins.
Lastly, wash the formula off the roof by gently splashing the surface with water. Be warned that this formula application and rinse procedure will make the roof surface area unsafe and potentially dangerous to walk on during treatment. The performance of a cleansing technique is only momentary, and discoloration will likely return.
Nevertheless, several sorts of algae resistant roof items have recently been created and are currently commercially available. These asphalt roof products are especially developed to inhibit algae development for prolonged periods of time.
Cautionary Message!
High pressure cleaning systems will very likely harm asphalt roofing and must not be used on asphalt roofing for getting rid of algae or for any type of other roofing application.
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