These black stains are called gloeocapsa magma a type of algae.
Safe way to clean roof in south florida.
Use a sprayer attached to garden hose that s filled with equal parts chlorine bleach and water.
Therefore low pressure roof cleaning is the safest and most effective way to clean a roof.
Since pressure washing water does not kill the mold mildew and algae your roof will get dirty within 6 months.
Instead of relying on high pressure to remove the algae and dirt we use soaps and tile roof cleaning chemicals specially designed to clean your roof the safest and most long lasting way possible.
Of laundry strength liquid chlorine bleach and water.
Most roof and pressure cleaning services use high pressure power washing devices to remove these stains.
It will rinse off the next time it rains.
This allows dirt mold and mildew to accumulate and grow faster.
Using high pressure to clean a tile roof is a crude and invasive form of cleaning.
By marcel rosen president fiddler roof cleaning did you ever wonder what the black stains on a dirty south florida roof are.
The best way to clean a roof is to use a roof cleaning chemical and let it sit for awhile.
This pressure will erode a surface layer causing it to be more porous.
With most good cleaners that s all you need to do.
This is the best way to clean a roof if you have asphalt shingles.
This method is stressful on your roof.
Use a pressure washer which can loosen shingles and seriously damage your roof.
Just spray it on and leave it.
Never allow any contractor to use a south florida high pressure washer on your roof.
Even some soft roof washing companies sometimes opt to use high pressure washers for small periods of time on certain areas of roofs.