Apply the zinc sulfate at a rate of 3 pounds for every 600 square feet of space as recommended by.
Zinc sulfate roof moss killer.
Gently remove the rest with a wire or nylon brush.
Among the products to use with caution are zinc potassium salts of fatty acids and oxidizing bleaching agents that do not contain chlorine.
If you collect water from your roof in rain barrels avoid using the water for your vegetable garden.
Moss is more than just ugly it can dam and divert water runoff causing water to leak into your home.
One brand name is moss b ware.
According to the manufacturers zinc sulfate will not stain roofs or corrode aluminum and galvanized gutters.
It will also corrode all of your fasteners allowing water to get underneath your shingles causing costly roof leak repairs.
Zinc is potentially toxic to fish and other aquatic life.
The technique most roofing contractors use when putting a zinc sulfate or zinc chloride compound is conducive to killing moss in patches creating a dalmatian like pattern.
Zinc sulfate general information.
Sprinkle a product that contains the main ingredient zinc sulfate over the moss you wish to kill.
Moss b ware is 99 percent zinc sulfate monohydrate a proven moss killer and moss deterrent.
Zinc is known to be toxic to fish and ncap does not recommend this as a first option.
In fact one way to prevent moss from growing in the first place is to attach zinc strips to the ridge of your roof.
Over time as rain falls zinc residue coats the roof to prevent moss growth.
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To use zinc sulfate one can apply powder directly to moss areas.
With either treatment method some moss will slough off naturally as it dies.
Zinc sulfate is toxic to fish and other invertebrates.
If you install zinc strips or zinc impregnated composition roofing ensure that roof runoff doesn t flow directly into storm drains streams or other bodies of water.
As rain runs over the strips zinc drips down your roof.