Put on non-slip shoes, gloves, eye protection, and a safety harness if needed
Use a sturdy ladder and have someone spot you
Remove loose debris with a soft broom or leaf blower
Gently brush off moss with a soft-bristle brush
Work from the top down to avoid lifting shingles
Apply a roof-safe moss remover or diluted cleaning solution labeled for roofs
Let the solution sit for the recommended time
Rinse lightly with a garden hose if the product allows it
Avoid pressure washing
Check and clean gutters and downspouts
Trim overhanging branches to reduce shade and moisture
Install zinc or copper strips near the roof ridge to help prevent regrowth
Inspect the roof for damaged shingles and replace them if needed
Repeat treatment as needed to keep moss from returning