From the Asphault Roofing Manufacturers Association read here.
Roof cleaning is one of our favorite services because it offers some of the most dramatic results and the biggest smiles. Not to mention the huge saving when compared to replacing shingles unnecessarily. Feel free to check out the link to the Asphalt Roofing Manufacturers Association and read their recommendations. Then call Oakland Power Washing to make that roof look young again.
Roof Stains… not only are they ugly and impact your property’s curb appeal, but they also can cause severe damage to your shingles! If you’ve ever wondered where the stains come from, the simple answer is from a living “plant” called Gloeocapsa magma. This algae is feeding on the limestone filler used to add weight to asphalt shingles. The reason it is 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 wetter longer. Lack of sunlight means moisture from morning dew and rain remain on these areas longer, creating the perfect environment for maximum growth.
As previously mentioned, the “simple” answer is a living plant causes the discoloration. To get a bit more technical, that “plant” is actually a cyanobacteria. Once the colony gets established is creates a petri-dish effect on your roof, allowing dozens of different hazards to thrive, such as lichen, mold, mildew, moss, and even ferns!
Did You Know?
Some insurance companies are canceling Homeowner Insurance policies due to dirty roofs? Don’t let this happen to you! Call Oakland Power Washing, we can safely and effectively remove algae, mildew, lichen and contaminants from your roof! Watch this video:
PROTECT YOUR ROOF & WALLET
Should you be concerned about it? Yes, besides being an eye sore, this algae has a root system and over time it will shorten the life of your shingles by dislodging the granules that protect and give your shingles color. Additionally the life that is growing on your roof is holding moisture 24/7 keeping the shingles are constantly damp. Continual exposure to moisture can cause your singles to prematurely fail.
Additionally all roofing material, whether masonry (tile) shingles, or metal has certain reflective properties. A matt of algae will impact your roof’s natural reflectivity and cause the surface to become hotter than a clean roof, thereby impacting your home’s energy efficiency.
NO PRESSURE ROOF CLEANING
We clean roof shingles using a “no pressure” approach. The shingle’s granules are its protection. The worst thing to 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 “soft washing” method uses a combination of cleaners, algae-cides and soaps to kill the algae at its roots. Our custom solutions are based on the Asphalt Roofing Manufactures Association’s who’s technical bulletin can be found here. Read The Technical Bulletin Here
A clean roof completes your property’s curb appeal - but it also increases the lifetime of your shingles. Our soft wash solution gets the job done. Our roof cleaning service comes with these benefits:
- Safe For Asphalt Shingles
- Won't Void Your Warranty
- Removes Harmful Algae
- Restores Roof Curb Appeal
- And more!
High-pressure washing systems are likely to damage asphalt roofing and should not be used on asphalt roofing for removing algae or for any other purpose.