Fill a large bucket with 1 gallon of water and add 1.6 cups of household bleach to it, thus creating a 10-percent bleach cleaner.
Pour a light layer of the bleach mixture onto the asphalt in the areas of high moss growth. Allow the bleach to sit for two to three minutes to begin killing the moss.
Place a long-handled, stiff-bristled push broom on the asphalt and scrub it firmly using back and forth motions to dislodge the moss from it. Moss does not have roots and will detach fairly easily.
Rinse the entire asphalt area with a spray from a garden hose to detach any remaining moss and to wash away all of loosened moss. Direct the spray to an area of the yard where there are no plants or grass, since the bleach may damage them.
Things You Will Need
- Long-handled, stiff-bristled push broom
- Garden hose
- Pressure washer (optional)
- The moss you remove will not regrow, because the bleach solution kills it. However, if the asphalt area remains moist or in the shade, it is likely that new moss will regrow later.
- If the moss covers a large area, you can also remove it using a pressure washer to speed the process along.
- It's a good idea to wear old clothes and shoes when removing the moss, since the bleach solution may damage them.