Want to test a new "green" product on your roof? Just Pressure Wash it? Or have a coating applied to it, so it may stay clean for 1-2 years? Or instead, be safe and stick with the Manufacturer instructions? Cleaning with their instructions generally lasts 3-5 years. No need for any after-coatings.
Below is the manufacturer "non-pressure" gentle dispersion and chemicals we use atÂ
Chuck Bergman Roof Cleaning.
We know your roof is expensive and you probably don't want to have any new chemicals tested out on your roof? By now, most consumers also know that pressure washing is the wrong way to clean a roof. Pressure washing is great for everything except your roof!
Non manufacturer cleaning methods may void your roofing warranty, according to the information in their links below, so we just clean them as the manufacturer says to. Then we get no lawsuits!
The main manufacturer recommended chemical is chlorine bleach.
Is bleach truly green and eco-friendly?
Yes I would say it is. Chlorine bleach is S H [look at the ingredients in Chlorox etc] and is made from common salt. It bio-degrades back into salt when it dries up.
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Chlorine is something we all drink from our tap water, soak in it in our showers and tubs and swim in it in our pools.
AT LEAST WE ALL KNOW WHAT WE ARE DEALING WITH, WHEN IT COMES TO CHLORINE. NOT SO WITH UNKNOWN CHEMICALS CALLED "GREEN"
The only real danger from chlorine, is if an unqualified roof cleaner does not care for your plants, directly below a roof edge, he can burn a line in your vegetation. We take professional precautions, before, during and after cleaning all roofs.
HERE ARE THE FACTS FROM THE MANUFACTURERS ETC: Below are the only manufacturer suggested chemicalsI have been able to find on any manufacturer website, bulletin, etc. Some *alternative chemical users* claim "Approved" but do not supply manufacturer links to prove it. The below info and links, prove how those who manufacture and warranty your roofing approve of cleaning them!
Below is a partial "cut and paste" excerpt from the above link: GAF Roofing Manufacturers, on how to clean a roof:
"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 baking soap" "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."
From ARMA roofing manufacturers Association-how to clean roofing.
Below is a partial excerpt cut and pasted below from ARMA:
Algae discolorations to remove from roofing surfaces, applying a solution of chlorine bleach, triS phosphate, {baking soap}and water. Solutions for these ingredients depend on the amount of discoloration. Solutions range to one cup baking soap and 2.5 gallons each of bleach and water. First, gently disperse this solution on the roofing surface. Avoid scrubbing the surface, as this friction may loosen and remove granules. Caution! High pressure washing systems for algae removal should not be used.
Owens Corning Roofing Manufacturers say the same thing:
"USE CHLORINE and baking soap" "DO NOT USE A PRESSURE WASHER"
YOU WILL NOT HEAR A PRESSURE WASHING MACHINE START UP WHEN WE CLEAN YOUR ROOF. YOU WILL NOT GET THE "BUT WE TURN THE PRESSURE WAY DOWN" STORY
We are certified roof cleaners, through the Roof Cleaning Institute of America. The RCIA is made up of professional roof cleaners, with a membership of aprox 2400.
We have also operated our pressure washing business here in Charlotte and South Sarasota County since 1989. We just don't pressure wash roofing, because it's the wrong way to do it!