How to Roof Clean and Power Wash
A roof overrun by green algae is unsightly. You can clean a roof by scrubbing it with a brush and hose, but this method is tedious and dangerous. Hoses make the roof slippery to walk on, and you can easily become tangled in a hose and fall. Using a pressure washer on a roof allows you to conduct the cleaning process in a much safer and more time-efficient way. When using a pressure washer on shingles, it is important not to set the power washer to a setting that is too high, which will damage the shingles. Always test the pressure setting on one tile first. If the discoloration washes away easily with no damage to the shingle, use that same setting on the entire roof. Does this Spark an idea?
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Instructions
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Connect the water hose to the pressure washer. Connect the water gun to the front of the pressure washer. Switch the pressure washer to "On" and pull the choke string. The pressure washer should come to life, as if you had started a chainsaw.
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Climb up the ladder with the pressure washer gun. Aim it at one of the shingles, holding the nozzle several feet away from the shingle.
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Press the trigger to begin shooting water at the shingle. Gradually move the nozzle closer to the surface and sway the stream back and forth. The algae and greenish discoloration should disappear, along with other dirt and debris.
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Use the pressure on the other dirty parts of the roof, repeating the same aiming and washing procedure. The pressure washer gun will allow you to target shingles that would have been tough to reach by hand.
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Tips & Warnings
You can use a pressure washers to completely clean a roof, replacing the long scrubbing process entirely. You can also purchase cleaning solutions and use them with pressure washers. Consult a home improvement store representative to find out which cleaning solutions are compatible with pressure washers.
