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Old 07-08-2009, 01:29 PM   #1
sweaty
 
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Pressure Washing My Roof?


My roof is covered with black algae. It's way too big to wash by hand. Can/should I pressure wash it?

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Old 07-08-2009, 04:52 PM   #2
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Pressure Washing My Roof?


You would be better off with a garden hose hooked up to an algae killing agent liquid dispersed at low pressure.

Their are products made for just roof cleanings, but with mixed results.

If you use a high psi pressure washer, you may damage the shingles by scouring the granules off with the algae embedded to the organic surface material.

Ed

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