The sight of moss growing on a roof lends a house a romantic old fashioned air but the moss can lead to leaks and structural damage.
Copper sulphate roof moss.
To kill moss add half an ounce of copper sulfate to 10 gallons of water.
However zinc and copper sulfate may react with red bricks.
Apply copper sulphate to a roof to kill moss and limit regrowth.
Zinc and copper sulfate will not stain patios decks walls walkways buildings or roofs.
Zinc and copper sulfate comes dry but can be applied as a powder or mixed with water.
Mix thoroughly and then wet the problem moss with the solution.
While moss on your roof or driveway is a common problem in our region some moss removal methods can pollute our streams lakes and wetlands and harm fish and plants in our waterways.
The easiest and cheapest way to kill and prevent moss algae is by using a copper sulfate solution.
This product reacts electrolyticallly with water to stimulate a slow release reaction.
The rinsing action should carry most of the moss off the roof although you could need to sweep some patches off with a broom.
See the before and after shots 1 day after fohman applied the 4 copper sulfate to the roof.
Spray copper sulfate over the moss affected roof using a garden or hose end sprayer blending and applying the material at a rate of 1 4 to 1 2 ounce of material per 10 gallons of water.
Copper is roughly 10 25 times more toxic to aquatic life than zinc.
Copper strips and copper impregnated shingles should be avoided due to copper s toxicity.
The copper sulfate solution will only kill the moss if it s allowed to remain on the moss for 24 hours prior to any watering including rain.
A brownish color indicates the moss is dead.
See the before and after shots 1 day after fohman applied the 4 copper sulfate to the roof.