Spray the shrubs, plants and grass underneath the roof eaves with water from a garden hose. Cover the vegetation with plastic drop cloths to protect them from bleach runoff.
Put on protective clothing, slip-resistant shoes, safety glasses and rubber gloves for protection.
Mix 1 gallon of water with 1 gallon of chlorine bleach in a plastic bucket. Pour the bleach solution into a clean pump sprayer.
Brush the excess moss down the roof using a telescoping pole brush. Remove as much moss as possible.
Spray the bleach solution liberally over the mossy shingles. Keep the solution on the roof for 30 minutes to thoroughly kill the moss.
Scrub the shingles with the telescoping pole brush to remove the remaining dead moss. Brush down the shingles to prevent damaging them.
Rinse the shingles with water from the garden hose to wash away the bleach solution. Spray down the shingles to prevent water from becoming trapped underneath them.
Allow the shingles to air dry.
Things You Will Need
- Garden hose
- Plastic drop cloths
- Protective clothing
- Slip-resistant shoes
- Safety glasses
- Rubber gloves
- 1 gallon chlorine bleach
- Plastic bucket
- Clean pump sprayer
- Telescoping pole brush
- Install copper or zinc strips along the roof's ridge to prevent moss growth on the asphalt shingles.