Below is the manufacturer method and chemicals we use.
We cover Charlotte and S. Sarasota County Florida.
Of course, these are all general guidelines for homeowners. The exact mixture we use, is dependant upon the conditions we find on each roof. Some require a stronger % chlorine mixture and others weaker. This is mentioned on one of the websites.
From GAF Roofing Manufacturers about black algae removal:
Below is a partial "cut and paste" excerpt from GAF 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 TSP"
"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, trisodium phosphate, and water. Solutions for these ingredients depend on the amount of discoloration. Solutions range to one cup TSP 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 says the same thing:
"USE CHLORINE and TSP" "DO NOT USE A PRESSURE WASHER"
Good Post. I will say I have tried some other so called green stuff to see how it works on shingles and tiles from roof tear offs that I aquired from my friend Brian Sikes at Brian Sikes roofing (who by the way gives me a lot of roof cleaning referrals) but anyways none worked at all. Point proven that green does not work. The pictures of the burned hedges in the ad looked like a Mallard special and a roof that wasn't rinsed and cleaned with 100% chemi.
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ORLANDO / CENTRAL FLORIDA "SAFE NO PRESSURE ROOF CLEANING" AND PRESSURE WASHING Since 1998.
Picture I had made digital, from one of the 1st jobs I ever did with non-pressure in 1991 with my 1985 chevy van and rvrything inside! Used to pump through 3/8" ID hose with little [If I rember correctly about the pumps?] 1 to 1.4gpm pumps and a pressure washing gun.
That van with a 50 gal SH tank and a 35 gal mix tank, was a death trap!
It didn't take me long to get a trailer!
-- Edited by Bergman Roof Cleaning Port Charlotte FL 941-698-1959 on Friday 16th of September 2011 09:07:49 AM
Nice job Chuck. I like the before, during and after roof cleaning pictures.
THANKS!
Ya, if my son and I are both on the job, I take the "during" cleaning pictures.
If I just send the camera with my son, 90% of the time he doesn't bother with it at all.
Or says "I forgot"
Or, just tales before and after.
He has brought back the camera with "Before" and no after too!
In the end though, he is the best of the best at this!
Usually he works alone and I never have to go back and redo his work, nor do I get plant complaints. Every week or so, I drive back by jobs he did, and look at the plants from the road. Never found a problem so far! This picture is him working on a pressure washing job in Boca Grande, Fl.
What has to be done, he makes sure he does right.
The picture thing is stupid to him and a waste of time, when he's all hot and sweaty working. I understand that.