Enjoy the 10% OFF during your first Non Pressure Roof Cleaning Services
What are those unsightly black stains on my roof?
The black stains on your roof (most commonly found growing on the north side) are a black mold fungus called Gloeocapsa Magma. These mold and algae stains are due to a limestone filler in asphalt shingles. When the roof becomes moist and does not completely dry out after rain or dew, it adds fuel to the fire for mold and algae growth.
What are the effects of these stains on my roof?
Besides the unsightly appearance of these stains, they are deteriorating and shortening the life span of the shingles. The mold and algae root themselves to the shingles breaking the sand granules loose, cutting the life of your roof in half. This will cost you THOUSANDS in early replacements. Long term effects on your health are possible too, because of the airborne mold spores released by these stains.
How can these stains be safely removed without damaging the roof?
These stains are removed by applying a special cleaning solution using ONLY NON PRESSURE methods. Absolutely do not let any contractor claiming to use “LOW PRESSURE” or pressure wash your roof, as this will only cause further damage and void your roof’s warranty. Even low pressure is too much. We use non-pressure to apply the cleaning solution recommended by ARMA (Asphalt Roofing Manufacturers Association) and GAF (the largest producer of asphalt shingles). The majority of the time this solution is applied from the gutter line. This allows workers to stay off the roof, saving it from more granule loss. Once the solution is applied, it dwells on the roof allowing it to safely kill and remove any growing mold, mildew, and algae. This process rids those unsightly black mold stains the same day, giving your roof the look of the day it was installed. The solution loses its effectiveness after 6-8 hours due to heat and UV light.
Does this process affect my plants and animals?
No. First, all downspouts are bagged to collect what little, if any, runoff of solution from the roof. This keeps any solution from running into the ground, retention ponds, or storm drains. The used solution is then taken off-site and disposed of properly at the correct wastewater treatment facility. Second, all plants and landscape are watered and then covered. Watering of plants and landscape is continued throughout and after the cleaning process. This usually leaves customers with more lush plants and flowers after the roof cleaning.
How much does a roof cleaning typically cost?
The average cleaning of a roof cost between 5% and 15% of what it would cost to replace it. The majority of the time this saves the customer an amazing 90% on having to replace the roof when it just needs a good cleaning in the first place.
Prestige Pressure Washing & Roof Cleaning offers Customer Satisfaction and 3 YEAR Roof Stain Guarantee! We also offer a Limited Lifetime Stain Warranty on the shingles with our Preventive Maintenance Plans. Don’t let those stains ruin your roof any longer; call the “Exterior Restoration Specialists” for your FREE Estimate and Demonstration!
Algae Staining On Shingled Roof Surfaces
|What Are Those Black Stains
On The Roof?
|Those black stains are Algae. Algae appear as dark stains on shingles that usually cover more area on the lower
section of the roof and taper as they reach the ridge.
|How Does A Roof Get
|Algae spread from one infected roof to another via airborne spores. These spores land randomly on a roof
and take root. A protective sheath creates the dark color the algae forms to protect itself from UV rays.
|How Does It Grow?||Algae require moisture and proper temperatures to grow. Dew is the primary moisture source. Algae are
found predominantly in the Southeast, but it can and will grow nationwide. The algae generally grow on the
northern exposures of the roof since this exposure generally receives less sunlight. Algae are well adapted to
|What Solutions Do I Have?||1. Install Algae Resistant Shingles, such as GAF shingles which have a specially formulated granule that
inhibits algae growth, keeping your roof looking new for years to come.
2. If a new roof is not an option, GAF recommends cleaning the roof with a special mixture. That mixture is:
4 gallons of water, 1 gallon of bleach and 1 cup of TSP (Tri-Sodium Phosphate-or acceptable phosphate-free
substitute) found at many home centers. Apply this mixture with a garden sprayer, let sit on the roof surface
for up to 20 minutes, and rinse with low-pressure water. Be sure to protect any shrubs below. Remember, the
roof surface will become slippery when wet… be careful!!!
|What NOT To Do!||Do not power wash the shingles to clean the shingles. Some roof cleaning companies offer this service.
However, it is not recommended as it may dislodge granules, which can lead to premature shingle failure.
|What GAF Shingles Can I
|GAF Designer Lifetime Shingles have StainGuard® Protection nationwide Additionally, Timberline®
Natural Shadow™, Timberline® HD™ and Timberline® Ultra HD™ have StainGuard® protection in
most areas. Finally, Royal Sovereign® is also available with StainGuard® protection in select areas. All
colors have Stain Guard® Protection.
|Where Can I Get More
|GAF Technical Services can assist you… with these and other questions you may have regarding your new
roof installation. GAF Technical Services can be contacted at 800-ROOF-411 (800-766-3411). Also, the
GAF website is a great resource for just about any question you may have or for additional information you
may require. That site is at: www.gaf.com