Moss often grows on roofs because leaves that fall on the roof from overhanging tree limbs retain moisture. Copper sulphate works well to remove moss on roof shingles, especially when the moss is growing and rain is unlikely. You can use copper sulphate alone or a mixture of zinc and copper sulphate. Both will not stain most roofs, but they could react with red bricks.
Things You Will Need:
- Tarpaulin or plastic sheet
- Copper sulphate
- Spray bottle
1. Cover the plants right underneath the roof with a large tarp or plastic sheet to prevent copper sulphate drips from getting on them.
2. Mix 5-8g per litre of water.
3. Spray the copper sulphate solution on the roof shingles, apply the solution at a rate of 1 litre per 5m2.
4. Thoroughly wash the metal eave troughs, downspouts and metal spray equipment with water to prevent corrosion.
Tips & Warnings
- Clean the roof regularly using a high-pressure water jet or a stiff 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.
- Avoid spraying copper sulphate solution during windy conditions to minimize the amount that gets on plants because it could hinder new growth.
Created by Mistral Pure Chemicals. View website