Cover the plants right underneath the roof with a large tarp or plastic sheet to prevent copper sulfate drips from getting on them.
Mix 1/4 to 1/2 oz. powdered copper sulfate with 10 gallons of water.
Spray the copper sulfate solution on the roof shingles.
Thoroughly wash the metal eave troughs, downspouts and metal spray equipment with water to prevent corrosion.
Things You Will Need
- Copper sulfate
- Spray bottle
- Clean the roof regularly using a high-pressure water jet or a stiff broom or brush to prevent moss from overtaking the roof. Prune back tree limbs over the roof to improve air movement and minimize leaf drop on the roof.