How to Remove Lichen From a Deck


Lichen is a type of fungus that grows in combination with algae, particularly in damp environments, humid climates or near water. It spreads along trees, rocks, sidewalks, buildings and decks, creating a slippery surface that can eventually damage that surface if not cleaned on a regular basis. Removing lichen from a deck is important in preserving the life of the deck, as well as maintaining a safe environment and helping to protect people and animals against slipping and falling.

Things You'll Need

  • Long brush
  • Garden hose or power sprayer
  • Fungicidal wash
  • Use a long-handled, stiff brush dipped in water to scrub away as much of the lichen as possible.

  • Spray a fungicidal solution onto the deck surface. Follow the directions on the solution to create the cleaning mixture.

  • Allow the fungicide to sit on the deck for up to 15 minutes or according to the time stated on the directions. If possible, allow the solution to sit on the deck for up to three days, if the weather is dry and sunny.

  • Add water and scrub the deck with the long brush to loosen and remove the lichen.

  • Rinse the area thoroughly with water from a power sprayer or garden hose.

  • Keep the deck clean and routinely brush and rinse the surface to keep lichen from spreading.

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