big question is how do you get rid of it and further more how do you
prevent it from returning.A clean house involves a clean roof and a
clean roof means remove the black stains on the roof.These black streaks
on your roof can be prevented.
Titanium dioxide is the answer. Titanium dioxide will eliminate black stains on roof through photo-catalytic oxidation.
If there is no black mold on your roof and you live in Florida, it is just a matter of time.
Titanium dioxide can prevent it from ever happening.
They all recommend bleach to remove black streaks on your roof, but in reality bleach is abusive to your roof and causes early breakdown of the roof. Bleach also never really kills the bacteria at the root source.It just kills enough of it to make a feeding source for new bacteria to grow.
Does Algae, Fungus, or Lichen damage a roof? Algae, fungus, and lichen on a roof is unsightly, and up until now, were believed to have no long term effects on an asphalt roofs. Recent studies have shown fungus, algae, and lichen may affect the overall performance of an asphalt shingle. The fungus and lichen require an organic based food source to survive. The asphalt in the shingle provides the nourishment for the fungus and lichen to flourish. The fungus and lichen can grow at a rapid rate, completely covering a roof slope in some cases. The fungus secretes enzymes into the asphalt which begin to digest the material at the base of the granule surface. The lichen has small roots that embed down underneath the granule surface to provide nourishment for the infestation. As the lichen blooms die, they pull away the granule surface which exposes small areas of asphalt. The open areas of asphalt are RESTRICTED to the area of lichen growth only. The algae requires an inorganic material to feed upon. Shingle manufacturers sometimes incorporate limestone (dolomite) into the manufacturing process, a specific food source for the algae. Algae are the least harmful of these three infestations.
HOWEVER YOU LOOK AT IT, BLACK MOLD ON YOUR ROOF WILL DAMAGE YOUR SHINGLES.
A simple spray down with titanium dioxide will prevent this from happening and save you thousands of dollars.
Below you see a barrel tile roof sprayed with titanium dioxide.
Ninety days and it cleaned itself with only sunlight.
If you use bleach on your roof you could void the warranty on your roof.
Roofing manufacturers are voiding roof warranties because of bleach use.
The roofing manufacturer will also void a roof warranty if you pressure wash the roof.
That is why preventive maintenance is your best bet and titanium dioxide is the best solution.
Titanium dioxide being photo-catalytic always makes hydrogen peroxide therefore it never allows mold to grow.
What happens is when the nano particle comes in contact with the sun it pops off constant h2o2.
So the big question is what are you waiting for?If you treat your roof before growth happens you will never have growth on your roof.
There are millions of square feet treated world wide with this technology and those treated areas remain clean from simply UV light.
Not only will titanium dioxide keep black stains off your roof but it will also clean the air. This science has been well documented since the 1970's.
Titanium dioxide cleans smog from the air. Read about it here