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Greetings all

My name is Brent and I recently started a roof cleaning business here on the north east coast of South Africa. We have a fantastic sub-tropical climate and therefore lots of black and green algae covered roofs to clean.It has been a huge learning curve so far and after reading some of the topics posted on this site I know I still have a lot to learn, but where to start. I have been using a pressure washer specifically built in SA for high pressure cleaning, but apart from being cumbersome to use on roofs, as you are all awareit is also potentially damaging to the tile surfaces if used incorrectly. I was particularly interested to read about the various chemicals one can use for cleaning roofs, however I do have a few questions and any advice will be greatly appreciated. I generally do not use chemicals due to the potential harm to the environment.

Firstly, I get many requests to do work in various ecologically friendly estates where the use of any harmful chemicals is rightfully frowned upon. Are there chemicals or a mixture of chemicals that are completely bio-degradable and have no impact on the environment, but areeffective in cleaning roofs and reducing algae growth?

Secondly, what are the simplestmost costeffectivemethods and systems for applying these chemicals?

This site and the RCIA has opened up a whole new approach to my business for 2009. There is no such institution that I know of in SA.

Thanking you all in Advance

Brent Botha
Breathe Industries.

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RCIA Founder

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Brent wrote:

Greetings all

My name is Brent and I recently started a roof cleaning business here on the north east coast of South Africa. We have a fantastic sub-tropical climate and therefore lots of black and green algae covered roofs to clean.It has been a huge learning curve so far and after reading some of the topics posted on this site I know I still have a lot to learn, but where to start. I have been using a pressure washer specifically built in SA for high pressure cleaning, but apart from being cumbersome to use on roofs, as you are all awareit is also potentially damaging to the tile surfaces if used incorrectly. I was particularly interested to read about the various chemicals one can use for cleaning roofs, however I do have a few questions and any advice will be greatly appreciated. I generally do not use chemicals due to the potential harm to the environment.

Firstly, I get many requests to do work in various ecologically friendly estates where the use of any harmful chemicals is rightfully frowned upon. Are there chemicals or a mixture of chemicals that are completely bio-degradable and have no impact on the environment, but areeffective in cleaning roofs and reducing algae growth?

Secondly, what are the simplestmost costeffectivemethods and systems for applying these chemicals?

This site and the RCIA has opened up a whole new approach to my business for 2009. There is no such institution that I know of in SA.

Thanking you all in Advance

Brent Botha
Breathe Industries.



South Africa ?
I have heard the Dog called a Rhodesian Ridgeback has urine that will clean a roof, LOL
Seriously, you need a chemical pump, not a pressure washer to clean a roof.
Look at the instructions to make Apple Cider roof cleaning chemical, and get the stuff you need to make it,
The KEY ingredient is 12.5 percent Sodium Hypochlorite.
You must find it.
When you spray it on the roof, you must either cover the plants with a tarp, or wet all plants down, and KEEP them wet as checical drips on them.
Properly diluted, the chemical is pretty much harmless.
Undiluted, it will burn and kill plants.



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Thanks so much for the info, much appreciated.You are right about the ridgeback:)
I have managed to source some chemicals in SA and am looking forward to my first guinea pig to clean, LOL. Until then however its back to antiquated high pressure for me.
If I may though, a few more questions. Can I premix in a normal hand operated chemical knapsack system? We use them here for poisoning plants on electric boundary fences around game reserves,farms etc and the only pressure is an air build up when you manually operate a lever and then dispense the contents through a hand operated nozzle.The coverage is pretty good and your spray area is about three feet wide. They carry about 6 gallons. How many square foot will 1 gallon of solution cover?

Thanks again ,Chris I would imagine from Apple


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