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Below is the manufacturer "non-pressure" gentle dispersion and chemicals we use at 

Your roof is expensive and you probably don't want to have any new chemicals or methods 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! WE HAVE BEEN PRESSURE CLEANERS SINCE 1989

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.

The main manufacturer recommended chemical is chlorine bleach.

Is bleach green and eco-friendly?

Yes I would say it is. Chlorine bleach is Sodium Hypochlorite [look at the ingredients in Chlorox etc] and is made from common salt. It bio-degrades back into salt when it dries up.

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" "Environmentally Friendly" ETC ETC

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, so this does not happen.

HERE ARE THE FACTS FROM THE MANUFACTURERS ETC:
Below are the only manufacturer suggested chemicals I have been able to find on any roofing 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 actually approve of cleaning them!

__________________________________________________________________

From GAF Roofing Manufacturers about black algae removal:

Below is a partial "cut and paste" excerpt from the above link: GAF Roofing Manufacturers, on how to clean a roof:

From ARMA roofing manufacturers Association-how to clean roofing.

Below is a partial excerpt cut and pasted below from ARMA:

Owens Corning Roofing Manufacturers say
the same thing:

This one, from the ARMA, says not to allow anyone to apply any

*after coating*

such as Algae-cides, Fungicides, zinc, copper, or other treatments - not anything! One commonly sold product is called roof*a*side

SO, ROOFING MANUFACTURERS SPECIFY ONE PRODUCT TO CLEAN WITH - CHLORINE BLEACH.  CHLORINE BLEACH. 

THEY SAY SPECIFICALLY NOT TO APPLY ANY COATINGS AT ALL AFTER CLEANING.

NOW YOU HAVE VERIFIABLE FACTS WITH LINKS TO MAKE DECISIONS WITH. NOT JUST SALES TALKS!.

If you would like your roof cleaned by the above manufacturer specifications, please give us a call!

Englewood  941-474-8883

Cape Haze, Placida, Rotonda 941-698-1959

Venice, Nokomis, Osprey, S. Sarasota 941-483-3673

Port Charlotte, Punta Gorda, PGI 941-255-8600

SEE SOME OF OUR RECENT JOBS

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 will not clain "No Pressure" and then use a cement surface cleaning maching to blast the dirt and algae off.
We will only clean with the specified manufacturer method.

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.

RCIA LINK: http://roof-cleaning-institute.activeboard.com/f523639/roof-cleaning-englewood-fl/

SEE SOME OF OUR RECENT JOBS Below.
http://www.flickr.com/photos/27773239@N02/?saved=1