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How to remove mold & algae from brick pavers

Updated February 21, 2017

You can use brick pavers for driveways, walkways and patios. Brick pavers are a beautiful addition around any home, but they're not as attractive when mould and algae cover the surface. Mold and algae thrive in damp and shaded areas, and mould can grow on virtually any surface, including brick. Attack mould and algae in their earliest stages by disinfecting the pavers with chlorine bleach.

Clean off the brick pavers with a garden hose on its strongest setting. Wash as much mould and algae from the pavers as you can. Be careful not to remove the filler material between the pavers.

Scrape off any remaining mould with a plastic spatula.

Prepare a solution containing 1 cup of chlorine bleach for each gallon of water.

Test the solution on a small portion of a paver. Look to see if the solution changes the colour of the brick. If the brick changes colour, prepare a solution of 1 cup of dish detergent for each gallon of water.

Rinse the pavers with a hose to get them thoroughly wet again.

Spray the solution onto the pavers. A spray bottle works for small areas. Use your hose with a spray attachment to spray the pavers if you have widespread mould and algae.

Scrub the solution into the pavers with a soft-bristled brush. Don't use a wire brush. Scrub with force to make sure you remove the mould's roots. Make sure to scrub in between the cracks, as well, but no so hard that you remove the filler material.

Rinse off the pavers, and allow the area to dry thoroughly. Expose the area to as much sunlight as possible. Cut back (or prune) any tree limbs or shrubs that are shading the area.

Use a power washer or fungicide if the mould and algae remain. Be careful when using a power washer, because it can dislodge the pavers even more than a hose.

Warning

Cover any plants near the pavers. Wear rubber gloves and eye protection when scrubbing. Don't use a metal spatula, because it can scratch the brick.

Things You'll Need

  • Garden hose
  • Plastic spatula
  • Chlorine bleach
  • Water
  • Dish detergent
  • Spray bottle
  • Spray attachment
  • Soft-bristled brush
  • Pruning shears
  • Power washer
  • Fungicide
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About the Author

John Smith is a writer with over 30 years experience. He has worked at a newspaper, various magazines and websites, and he has interests in a wide range of subjects including sports, politics and entertainment. Smith earned a bachelor's degree in history from the College of New Jersey.