Roof stains are not only ugly and impact your properties curb appeal but they also cause severe damage to your shingles! The stains are caused by an airborne bacteria called “Gloeocapsa Magma”. This bacteria feeds on the limestone filler that is used to add weight to asphalt shingles. The reason the stains are more prominent on the north side and shaded areas of your roof is because these areas get the least amount of sunlight which causes that area of the roof to stay damp longer. The lack of sunlight means moisture from morning dew and rain remain on these areas longer creating the perfect environment for maximum growth.
Once the bacteria, that causes the discoloration, gets established it will quickly spread and allow dozens of different growths to thrive such as lichen, mold, mildew and moss.
Should you be concerned about it?
Besides being an eyesore, this bacteria, over time, will shorten the life of your shingles by dislodging the granules that protect and give your shingles color. The buildup of Gloeocaspa magma on residential properties has led to earlier roof replacements, lowered property resale values, insurance companies canceling policies and increased utility costs as the black stained roofing draws in more heat.
All roofing material whether it is metal, or asphalt shingles, has certain reflective properties. Dark stains covering your roof will cause the surface to absorb more heat than a clean roof, thereby impacting your homes energy efficiency.
Our No pressure roof cleaning method
The granules on your shingles are its protection. The worst thing you can do is to use pressure to clean them because it will blow the granules off of the shingle, severely shortening the life of the shingle.
Our no pressure roof cleaning method is recommended by the Asphalt Roofing Manufacturing Association. After lightly applying our roof cleaning solution evenly over all of your shingles you will notice an immediate difference! You will start to see your roof’s natural color come through. We will let the solution sit and continue to clean. Then subsequent rainfall will naturally rinse away any remaining stains.