For years, roof discoloration triggered by algae has actually been observed throughout the USA and Canada. The discoloration typically has a brown to black appearance, and might be mistaken for fungus growth, soot, dust, moss, or tree droppings.
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Gloeocapsa magma is probably the most prevalent of a number of algae varieties that add to discoloration. All species are carried via the air, and often tend to accumulate and grow upon roofing frameworks. Natural pigments produced by these algae might trigger a white or light colored roof to progressively turn dark brown or black. Discoloration might appear as uniform discolorations or streaks. The algae stains should not be mistaken for moss or tree sap, which usually create only localized discolorations.
This kind of roof discoloration has been most extensive in the Gulf States, particularly Punta Gorda and along the Northwest and Eastern Seaboards. It is not, nonetheless, restricted exclusively to these regions.
Algae development strikes varying levels in all regions of the country, particularly those based on warm, damp climates. It must be noted that nearly all types of roofing systems are susceptible to algae discoloration. It is, of course, readily visible on light colored roofs, while it is not so visible on darker shades of roofing. Algae stains are hard to eliminate from roof surfaces, however might be lightened by using a solution of liquid regular household chlorine bleach (sodium hypochlorite) and water. Directions for blending solutions of these ingredients may differ between roof shingles producers and depend on the extent of discoloration.
A typical solution should be one part chlorine bleach and one part water. Various other cleaning chemicals or approaches should not be utilized without authorization of the shingle producer. First, carefully disperse this formula on the roofing surface. Please use regular safety measures for dealing with bleach including eye protection and rubber gloves. Please call us for roof cleaning contractors help.
Make sure to apply it very carefully to stay clear of damage to various other components of the building and the surrounding landscape. Avoid scrubbing the surface area, as this friction may loosen and eliminate roof granules. If possible, always apply this solution from a ladder and/or scaffolding to prevent straight contact with the roof surface. Observe all possible safety and security precautions when dealing with or near the roof. The solution must be left on the roof for a minimum of 15 minutes but for no more than 20 mins.
Finally, wash the formula off the roof by carefully spraying the surface with water. Be alerted that this solution application and rinse process will also make the roof surface slippery and potentially hazardous to walk on during treatment. The efficiency of a cleansing technique is just short-term, and discoloration will likely reoccur.
Nonetheless, several types of algae resistant roof covering products have been created and are currently commercially offered. These asphalt roof covering items are especially designed to inhibit algae growth for extended periods of time.
Caution!
High pressure washing systems will very likely damage asphalt roof shingles and should not be directed to asphalt roof for removing algae or for any other roof purpose.
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