Chalky powder removal: "I have an 11 year old blue metal roof. In ..." - Sandor Feher (4/6/2009) | General Discussion | Archive

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I have an 11 year old blue metal roof. In the past 4-5 years I run small sprinkler lines on the roof to cool the roof/attic/house in the hot summer months. Yes it will cool sufficiently, roof temperature is around 155F, attic about 135F but while the fine mist sprinkler is on attic temperature drops to around 95F. I am using clean irrigation water that coming from a very clean lake. The problem is that this water left an unwanted chalk residue on the roof that I would like to remove. Is any good solution would clean off this chalky powder mess?		Sandor Feher 4/6/2009	Share Or copy this URL: https://www.metalroofing.com/spirit/comment/13066/find/
Is the chalk from the water or is it actually a breakdown of the paint itself?		Todd Miller Isaiah Industries, Inc. 4/7/2009	Share Or copy this URL: https://www.metalroofing.com/spirit/comment/13067/find/