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Old 12-13-2012, 08:18 PM
lkendall lkendall is offline
LawnSite Member
Join Date: Jul 2011
Location: Ocean City, Maryland
Posts: 157
We use a low pressure chemical solution.. This solution is really the only way to clean a roof.. Using a pressure washer is a big no-no in this service. The whole goal it to remove the black stains (which is a type of mold) without removing the limestone granules. The solution contains algae-cides and fungicides which remove the mold by the roots so your clean roof or exterior stays cleaner longer than powerwashing
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