How to Wash your Deck

Whether your entire deck has turned gray due to sun and weather exposure or you just have a tough stain to tackle, we can help you restore it to like-new condition.

Washing Your Deck

Manually washing your deck is a lot of work, but the results are well worth the effort.

You Will Need:

  • 80-grit sandpaper
  • Push broom
  • Deck cleaner, such as Woodwash
  • Safety glasses
  • Water hose

The Cleaning Process:

  1. Begin by removing all furniture and other items from the deck surface.
  2. Use 80-grit sandpaper to smooth out rough edges.
  3. Sweep deck surface.
  4. Wet down plants nearby. Check the label of your deck cleaner to see if you need to cover plants with plastic sheeting to protect them.
  5. Apply deck cleaner according to the manufacturer’s instructions. Wear safety goggles to project your eyes.
  6. Use the broom to scrub the deck with cleaner. Do not allow the cleaner to dry on the deck.
  7. Use the hose to rinse the deck thoroughly.
  8. Allow to dry.

Pressure-Washing

For a fast, deep clean, consider using a pressure washer for the job.

You Will Need:

  • 80-grit sandpaper
  • Push broom
  • Pressure washer (no more than 1500 psi)
  • Deck cleaner, such as Woodwash
  • Safety glasses
  • Water hose

The Cleaning Process:

  1. Begin by following steps 1-6 for washing your deck. The pressure washer comes in when you are ready to rinse the deck.
  2. Rinse the deck cleaner with a pressure washer, following equipment directions. Generally speaking, you should start in one corner of the deck and work your way toward the stairs, washing in the direction of the grain to avoid gouging the wood. Use caution in corners and near railings, as the water spray may deflect back into your face.
  3. Allow the deck to dry.

Removing Stains, Paint, and Rust


Rust, paint, and other stains can be very hard to remove from wood, especially if it was not properly sealed. Some stains may not come up at all, but if you follow these steps, you may have some success at removing or reducing the stain.

You Will Need:

  • Stain remover, such as STRIPEX (for stains, sealers, or damaged wood fiber) or Organic Strip (for paint)
  • Water
  • Safety goggles
  • Push broom or synthetic bristle brush
  • Putty knife

The Cleaning Process:

  1. Always wear safety goggles when working with chemicals.
  2. Following manufacturer’s directions, apply product directly to stain. SPOT TEST FIRST.
  3. Allow it to sit as recommended.
  4. For STRIPEX, leave for 15-30 minutes before rinsing. Tough stains may need to be scrubbed with a brush.
  5. When removing paint with Organic_Strip, allow it to sit for 15-75 minutes before scraping paint stain with a putty knife. Scrub as needed.
  6. Allow to dry.

Keeping Your Deck Clean

To protect your deck from the elements and make it easier to clean in the future, you may want to apply a wood stain or sealer. Spot test the stain or sealer in a hidden spot, as even clear stains will change the color of your deck.

You Will Need:

  • A clean, dry deck
  • Paint brush or roller brush
  • Roller brush pan
  • Deck sealer or stain such as Super Natural Wood Stain
  • Gloves
  • Safety glasses
  • Rags
  1. Begin by reviewing the manufacture’s directions and specifications.
  2. Spot test the product.
  3. Using gloves and safety glasses, apply the stain or sealer in even amounts across the surface of the deck with a brush or roller.
  4. Use the rag to rub out excess stain.
  5. Allow to dry according to manufacturer’s directions.

Additional Tips and Advice:

  • Spot test chemicals, stains, or sealers before applying them to the deck surface.
  • Wear safety glasses and rubber gloves when using chemicals.
  • Using bleach on a deck may result in uneven spotting. Bleach also weakens wood fibers.
  • Certain wood or composite decks may need special care. Make sure that the products you choose are compatible with your deck surface.



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{ 4 comments… read them below or add one }

mitchy July 26, 2008 at 1:13 pm

Help – we just purchase a home where the previous owner splashed some concrete onto the exterior hardboard

Is there any way of removing this without sanding down the area and having to repaint (he does’nt know the paint chip number)?

James Higbie August 23, 2008 at 7:48 am

Nothing is mentioned about that green algae that grows in spots on my deck. Is there an alternative to bleach?

mr_opinion August 25, 2008 at 3:37 pm

I’ve had some issues in the psst with stained decks from BBQ grease and algae spots. Use the deck wash as normal but before you rinse, get down on your hands and knees with a green scotch-brite pad and scrub. Rinse and repeat as needed. If you’ve got a big deck or big stain, you’ll be tired when you’re done but it will be well worth it.

neil December 1, 2008 at 9:51 am

The absolute best way to clean weather beaten wood is with pool clorine. spray it on with a garden sprayer, let it soak in for 5 minutes and rinse it off. You will be amazed. Do not let the clorine sit too long or it will start to lift the grain.
This procedure only works with uncoated wood.

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