How to Clean Cypress Wood

How to Clean Cypress Wood. Found primarily in the southern United States, the cypress tree produces a soft wood that holds up well to moisture and harsh conditions. While cypress may be found indoors as furniture, flooring and decorative objects, it is frequently used where its weather resistance is a benefit. Cypress siding, decks and outdoor furniture need little maintenance, but an annual cleaning will keep it looking like new for years.

Cypress trees thrive in swamps, making their wood unusually moisture-proof.

Things Needed

  • Nylon brush
  • Garden hose
  • Pressure washer
  • Bleach
  • Linseed oil
  • Rag

Step 1

Brush outdoor cypress wood with a nylon brush to remove loose dirt.

Step 2

Spray the cypress wood with a garden hose.

Step 3

Add bleach to the pressure washer tank as directed by the manufacturer. Set the washer to 500 psi, with a 40-degree tip size. Press the trigger and spray the cypress with a back-and-forth motion starting from one corner and working your way over the entire surface.

Step 4

Allow the cypress to dry completely. If the wood is unfinished, apply a coating of linseed oil to the entire surface of the wood using a rag. For furniture pieces, allow the wood to dry for 48 hours before use.


  • For indoor furniture, clean with oil soap and a soft cloth.


  • Pressure washing at 1,000 psi or higher may cause damage to cypress wood.
  • Wear coveralls or old clothes when pressure washing with a bleach solution.
  • Do not pressure wash indoors.


  • Southern Cypress Manufacturers Association: Cypress Basics
  • Southern Cypress Manufacturers Association: Siding and Paneling
  • Classic Adirondack: Cypress Furniture Care
  • Using A Pressure Washer To Clean A Deck
  • Jamar Remodeling Inc: Sealing For Long Lasting Decks And Fences