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I had my shingles washed with a brush and a weak bleach solution that made it look like new, but with little erosions of the surface of the shingles. It required a guy on the roof gently scraping, but I'll guess it extended the life of the shingles about 10 years over a pressure washer. The only thing I've seen pressure washers successful with was a concrete surface
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less I say, smarter I am
Last edited by meembo; 01-04-2004 at 04:18 PM..
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