Q:

How do you remove moss from a tarmac driveway?

A:

Quick Answer

To remove moss from a tarmac driveway, dislodge it or spray it with a chemical moss killer. Dislodging can get rid of large growths, but chemicals may be required to remove stubborn moss growths or algae.

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Full Answer

Moss and algae do not harm driveways, but they can cause the tarmac to become slippery. There are several ways to dislodge moss from a tarmac driveway. These include:

  • Spray it with a spray hose or pressure cleaner
  • Scrape it away with a sharp blade
  • Brush the tarmac with a stiff broom

Chemical control methods can be more thorough, but may damage surrounding plants. Products containing bleach, benzalkonium chloride or hydrochloric acid can kill grass or bedding plants near the driveway area. Cleaners containing seaweed extracts are safer for nearby plants. Cleaners do not keep moss at bay forever, though, and require repeated use.

Moss and algae thrive in damp and shady spaces. People can use a number of prevention methods to keep moss and algae from building up on driveways. These include:

  • Make sure the driveway gets lots of sun, as this dries out the tarmac
  • Make sure that lawns and garden beds have proper drainage so that water does not run onto the driveway
  • Regularly wash and brush driveways
  • Increase airflow to the driveway by nearby plants and trees
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