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Old 01-19-2014, 12:31 PM
lkendall lkendall is offline
LawnSite Member
Join Date: Jul 2011
Location: Ocean City, Maryland
Posts: 157
The price depends mostly on sq footage.. Usually between 20-25 cents a sq ft. Can be more or less, especially if you have any of the green moss growing on the roof. If its just the black stains on a small cape style home then somewhere in the $300 range. You want to make sure that you get a company that is using low pressure, you want the chemical to do the work rather than the pressure of the water.. It can be a pain to do it yourself, especially if the roof is steep and you can't walk on it. When someone comes to treat the roof, the system they will be using can treat the entire roof from the gutter line without getting on the roof.. Hope that helps!
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