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Black Algae Growing On Roof

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Brad Caldwell emailed photos of one of his customer's roof that had algae growing on it. Below is what Brad had to say.

"A customer had a steep roof with black algae growing on the North faces of the roof. Pressure washing didn't get it, but using the Stain Solver "melted" away the algae. The algae started dripping off before we pressure-washed it off! Great product.

The before shot showing black algae on the roof.

The after shot with no algae.