The best way to clean a roof is to use a roof cleaning chemical and let it sit for awhile.
How do you clean a roof.
Start at the lower portion of the roof moving up as you clean each lower section.
You can do roof cleaning on your own.
As you continue rub gently don t scrape scour or pound on the roof and work in one small section at a time to avoid ripping cracking or breaking the shingles.
I mix up my cleaner in bug sprayer container and spray it all over the roof.
Cleaning roofs is slippery work.
It will rinse off the next time it rains.
Here s how i do it.
If your roof slope isn t too steep and you re comfortable working on it you can clean it yourself and save the dough.
These roof algae are considered to be a living thing that can actually eat up your roof shingles.
Working up on the roof can be a dangerous task to say the least.
If you do get up on your roof wear well fitting shoes with slip resistant rubber soles and be sure to don eye and skin protection.
You ll need a full body harness a garden sprayer a.
With most good cleaners that s all you need to do.
Professional roof cleaners charge hundreds of dollars.
Don t use a.
To clean a metal roof wait for a dry overcast day and make sure you have a partner to help you for safety reasons.
Clean your roof only after determining that you can safely walk its surface.
So you may want to have this job done by someone who has experience working up high.
That way you always stand on dry surface and reduce the chance of slipping.
If the slope is too steep to easily traverse or if your house is more than one story you should hire a pro.
Use the sprayer to saturate a strip 3 feet high x 10 feet wide.
Just spray it on and leave it.
And they have to repeat the cleaning every few years.
When you re ready to get started spray your roof using a garden hose with a spray nozzle attachment starting at the top of the roof and blasting downward so the dirty water runs off the sides.
Before you clean stains you ll have to climb up onto the roof and take off twigs leaves and anything else that would get in the way.
Spray the cleaner on a section of roof and let it sit for about 15 minutes.
The bigger the roof the more hundreds you ll spend.
Pick them up with your hand use an air blower or gently sweep them off with a broom.