cleaning soot of roof

Hi. I have a fin al metal roof and after 25 years there seems to be a build up of soot from the wood stove chimney. I would like to know how to clean this as it is restricting the ability of snow to slide off the roof. Thanks for your consideration on this matter. DIA		Guest User 8/16/2016	Share Or copy this URL: https://www.metalroofing.com/spirit/comment/21441/find/
Soot and combustion products are typically acidic so a mildly alkali surfactant usually does the job.		Eric Novotny An informed customer is the Best Customer! 8/17/2016	Share Or copy this URL: https://www.metalroofing.com/spirit/comment/21442/find/
Any specific product you would recommend?		Guest User 8/17/2016	Share Or copy this URL: https://www.metalroofing.com/spirit/comment/21443/find/
TSP is a pretty common cleaner.		Eric Novotny An informed customer is the Best Customer! 8/18/2016	Share Or copy this URL: https://www.metalroofing.com/spirit/comment/21444/find/
Thank you for all of your help. I will try that.		Guest User 8/22/2016	Share Or copy this URL: https://www.metalroofing.com/spirit/comment/21445/find/

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