When it rains water will pick up the particulates in the zinc and deposit them along the roof preventing more moss from growing.
Moss out roof strip.
Install a zinc strip near the ridge of the roof.
Is more granular and less powdery than moss b ware and this makes it easier to shake out onto the roof.
From lilly miller is 99 percent zinc sulfate monohydrate.
Stop a moss problem from returning by installing strips of zinc or copper coated sheet metal just below the top ridge on both sides of the roof.
The best long term solution.
The active ingredients in moss out.
Preventing roof moss with zinc strips in this video this old house general contractor tom silva shares tips for keeping a roof free of moss and mold by this old house.
Zincarmor 3 wide zinc strip 99 5 1 roll of 50 feet prevent algae moss lichen fungus mildew zincarmor is specifically designed to inhibit the growth and formation of moss algae mildew and fungus on roofs concrete asphalt and other surfaces where build up and growth can occur.
Attach strips of zinc 37 the home depot or zinc coated metal flashing strips just below a roof s peak or ridge caps.
Like moss b ware moss out.
Are the same as moss b ware but the texture and delivery system are different.
When it rains water flows over the metal strips leaching out moss retardant zinc particles which attach to roof shingles and or tiles to stop new moss from forming.