The average garden hose sprays water at 40 to 80 psi.
Roof pressure cleaner.
It is also effective on asphalt shingle or cedar shake roofs and badly stained or oil spotted concrete in the fastest and easiest way possible.
Always stand on a dry area of the roof as wet shingles can be very slippery.
To use this roof shingle cleaner correctly you should mix one part of bleach with one part of water.
Chlorine bleach will effectively kill any mold that is starting to grow and loosen up many of the stains.
The water pressure will remove the granules that are important for protecting your roof.
When you apply the bleach do not immediately wipe it off.
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Start with a medium pressure spray pattern and adjust from there accordingly.
Instead soft washing with a garden hose is least likely to chip dent or crack the tiles or panels.
Once you squeeze the trigger the powerful recoil on the spray wand can throw you off balance and off of a ladder.
Traditional pressure washing will destroy and take away the life span from your roof.
If algae or mildew returns we will come back and clean it for free.
Instead spray down the roof with a cleaner that kills mold and moss or apply a 50 50 mixture of bleach and water in a pump sprayer and let the moss die on its own.
Product overview the m 1 deck and roof multi purpose cleaner is designed to clean the dirtiest pine cedar redwood cypress and birch decks or siding.
Use low pressure to spray it clean.
Get fair costs for your specific project requirements.
The cost to pressure wash roof starts at 0 33 0 40 per square foot but can vary significantly with site conditions and options.
Make sure to build up pressure.
The power of a pressure washer can damage the shingles on your roof so it s important that you select the proper spray tip.
Bleach is the best way to clean roof shingles.
See typical tasks and time to pressure wash roof along with per unit costs and material requirements.
Pressure washers use 1 300 to 2 800 pounds per square inch to strip dirt moss and even paint from a surface.
By comparison a fire hose sprays at 150 to 300 psi.
Not to mention using a pressure washer from a high place is dangerous.