The active ingredients in moss out.
Moss out roof strip.
When it rains water will pick up the particulates in the zinc and deposit them along the roof preventing more moss from growing.
Lilly miller moss out.
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.
From lilly miller is 99 percent zinc sulfate monohydrate.
Install a zinc strip near the ridge of the roof.
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.
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.
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.
Roll out the zinc strip underneath a course of shingles allowing roughly half of it to be exposed and the other half underneath the shingles.
The best long term solution.
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.