Stain a Deck

How to Stain a Deck

Test the wood

  • To determine if your wood deck needs sealing, sprinkle water on the deck.  If it beads up, then you may not need to reseal it.  If the water soaks into the wood, the deck can be sealed.

Lightly sand

  • If you are sure that the deck needs sealed, lightly sand any rough spots with 80-grit paper. 

Apply deck cleaner

  • Mildew and sun damage are cause for cleaning the deck with a deck cleaner.  Make sure that you read the instructions on the label including any safety precautions like wearing goggles, closed toe shoes, pants, and long-sleeved shirts   
  • Follow the directions for applying the cleaner, scrubbing any tough spots, and rinsing the deck.

Sealing or staining the deck

  • Assuming you used a deck cleaner, allow at least 2 days for the deck to dry before applying a sealer.  Check boards for popped up nails. 
  • Always read the manufacturer’s instructions for applying a sealer or stain and heed safety precautions such as wearing goggles, closed toe shoes, pants, and long-sleeved shirts   
  • Check the weather and try to stain or seal when there will be dry weather between 50 and 90 degrees F.  In the Boise area, the best months may be June or July.  Don’t apply the deck product in the direct sun.  It will dry too quickly.
  • Stir stain or sealer thoroughly, but gently.  Don’t shake it as it will form bubbles that will dry on the wood as bubbles.
  • Apply a thin, even coat on 2 or 3 boards at a time using a paint roller, or a sprayer.  Apply two thin coats rather than one thick one, although a second coat is optional..  Don’t allow it to puddle.  Use a paintbrush for corners, steps, and other hard to reach areas.
  • Allow deck to dry completely.