Therefore you have decided that walking around on your rainy roof to completely clean off those ugly black stains is not for you. That is probably a good decision. Cleaning your own roof can be very dangerous. roof cleaning Geelong
You could have considered using what I call a “spray and wait” product sprayed on your homes roof from the earth. But you probably discovered that after buying or renting all the equipment you would need and waiting a few several weeks for rain to rinse the dead organisms away, that you will likely have to do the process again and the expensive a few times to get results. So you are determined to hire a roof cleaning service. I feel that is a good decision as well.
But now the hard part: Who do you hire? It is not as easy as picking a number out from the cellphone book or googling for roof cleaners. That’s only a first step. You must know that there are incredibly important dissimilarities between roof cleaning contractors. Besides the evident such things as time in business, having good reviews and proper insurance, the methods and chemicals the service provider will use on your homes roof could indicate the difference between a clean roof and a disaster.
Unfortunately, it is not always easy to know or to learn about these things, because many contractors will deliberately hidden their methods from you. Why? There are two major camps in this industry: those who use sodium hypochlorite (bleach) and those who do not. Those who use lighten do so for their own economical reasons: This is cheap, simple fast. Bleach is the very momentary solution to roof structure staining because it only masks the stain and does not eliminate the creatures that cause it.
The black stains on your roof are caused by cyanobacteria, Gloeocapsa Magma, which most roof cleaners send to as algae. This kind of is a single cellular organism and the discoloration consists of billions of cellular material, both dead and living. Together they earn up what I call “algal glue”. This glue surrounds the granules that top your asphalt shingles. It’s the lifeless cells that cause the staining, nevertheless they get around rather than that: They will provide a microclimate for the living cells. The dead cells protect the living cells from getting too much sun and they also act like a sponge, holding dampness for the living cellular material. Dead and living cellular material are intertwined in a single layer of crud.
Unless this entire part is removed from the roof, the stains will be back very quickly. Chlorine bleach is a strong oxidizer and when applied to the algal glue it oxidizes the top surface of the stain and the stain seems to go away. But under this oxidized layer the algal glue remains. The moment the upper oxidized coating wears off the discolorations appear to come back again, though they were never really gone. This is exactly why the American Roofing Manufacturers Connection (ARMA) tells homeowners that bleach is merely a non permanent solution.
You should avoid chlorine bleach not only because it is ineffective at spot removal, but also because the EPA has came to the conclusion that it can destroy most termite treatments in the ground around your home. You won’t know this happened until you have termite damage. If you do hire a “bleacher”, make certain approach your infestations control provider about reapplying your termite treatments. Better, avoid contractors using antibiotics. Then you won’t have to worry about your plants either.
How do you know if a contractor uses bleach? This individual may let you know so, and his prices will probably be lower than others who avoid the use of bleach. A few contractors however are incredibly proficient at obscuring the simple fact that they use bleach. Look for the Material Safety Info Sheet on the product he uses. If it says “sodium hypochlorite”, that means bleach. Look for code words on his website such as “Only Manufacturer Approved Chemicals” and “ARMA Recommended”. This always means bleach.