These are on average around 3 inches wide and you can nail them a little below the peak of the roof.
Keep moss from growing on roof.
Keep your gutters clean and remove fallen branches and debris.
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.
The best way to prevent moss from growing on your roof is to minimize its ideal growing environment.
Moss prefers to grow in the shade so exposing more of your roof to sunlight will help deter it.
Eliminating either of these items will help reduce moss growth.
Copper is more toxic to moss and algae but zinc is.
A better choice is zinc strips.
If you want to avoid damage to your roof here are some ways to prevent moss from growing on your roof from the start.
Overhanging tree branches help create the perfect environment for moss to grow.
Remove sources of shade.
Consider trimming tree branches to expose your roof to more direct sunlight.
To prevent moss from growing on your rooftop remember that moss is attracted to damp and shaded areas.
It will keep the moss off your roof but it will eventually run into the ground water.
The branches and leaves offer shade from the intense sun.
Limit shade and clear any debris that could lead to moisture on your roof.
That water is sometimes leaked in between shingles and through the roof.
Potassium salts of fatty acids applied using a hose end spray attachment.
Trim tree branches away from your roof to eliminate shading as any overhang from branches will inevitably shed sticks leaves and seeds onto your roof.
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.
Nail the zinc strips to the cement areas between the bricks at approximately 1 foot increments using a powder actuated nail tool and 2 inch cut masonry nails.
Spray the moss covered roof with a moss control product or sprinkle the material on depending on the product formulation.
You should consider trimming trees that shade out the roof or moving garden features like pergolas or trellises so that they do not cast shade on the roof.