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just tap water, been doing it that way for years!!!
Quotejust tap water, been doing it that way for years!!!Even with alot algae on the roof?
i use virosol mixed with water in a 5L pressure sprayer.spray roof,leave 5 mins then wfp off with hose on customers outside tap if available.i use a carbon gooseneck with a gardiners medium bristle sill brush for conny roofs.regardsdazmond