Clean shingles on a cool humid overcast day to ensure that the cleaner doesn t dry too fast on the roof.
Roof cleaning mixture.
3000 psi is overkill and an unacceptable cleaning method for your roofing system whether it is an asphalt roof tile roof cedar roof or even a metal roof.
One is the guy on the roof spraying cleaning the roof and the other ones job is to spray everything and anything that could get over sprayed with the roof cleaner.
And proper rinsing is without a doubt of utmost importance.
If it s something like scratch tile then it will take like 100 gallons for me.
After spraying the roof with the mixture allow it to sit on the surface for 15 to 20 minutes before rinsing thoroughly with clean water.
No matter what method used.
Folks do not realize that one gallon of chlorine not bleach will kill bacteria in 10 000 gallons of water.
We clean roofs all day long.
The secret to roof cleaning is the proper mixture of chemicals.
Pour the mixture into the garden sprayer.
On a standard shingle roof here i can do a 2000 sq ft house with 50 gallons of mix easy.
So you would wet down all plants and then rinse them again once you re done cleaning the roof.
Barrel tiles tend to take more mix also because everything rolls off the tops of the tiles and channels itself in the valleys of the tiles.
The average garden hose puts about 40 80 psi which is all that you need to properly and effectively clean your roof.
Ignore your landscape and surrounding areas which can be harmed by the bleach solution.
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I won t reveal my mix ratio but it certainly does not have to be flooded.