How to Prepare and Paint or Stain a Deck

A freshly painted or stained deck can make your backyard feel brand new. It also helps protect the wood from moisture, UV rays, and daily wear. Whether you’re going for a clean solid colour or a more natural, semi-transparent finish, it all starts with good prep.

What You’ll Need:

• Deck cleaner or wood brightener
• Scrub brush or pressure washer
• On-Floor deck sander (available for rental from Autohome)
• Sandpaper or sanding pole (60–100 grit)
• Exterior stain or deck paint
• Paint brush, stain pad, or roller
• Painter’s tape
• Drop cloths or plastic
• Safety gear (gloves, mask if sanding)

Step 1:

Clean the Deck

Use a deck cleaner or wood brightener to remove dirt, mildew, and old stains. Apply with a garden sprayer or scrub brush, and let it sit for the recommended time before rinsing.

Tip: A pressure washer can make this step easier—just be careful not to damage the wood. Use a wide-angle tip and keep the nozzle moving.  Avoid triggering the spray on the deck.  Trigger off of the deck board and then move the spray onto the deck to avoid damaging the boards.

Let the deck dry completely for at least 48 hours before staining or painting. Remember, if it rains, begin the count down again.

Step 2:

Sand Rough Areas

Once dry, inspect for rough spots, splinters, or peeling paint. Sand any problem areas using 60–100 grit sandpaper to smooth the surface and help the new coating stick.

You don’t need to sand the whole deck unless the wood is severely weathered or previously painted—just focus on the trouble spots.

Step 3:

Protect Surrounding Areas

Use painter’s tape to mask off siding, railings, or posts. Lay down drop cloths or plastic to protect nearby walls and plants from splatter.

Step 4:

Choose Paint vs. Stain

• Solid colour stain or deck paint gives full coverage and hides flaws—great for older decks.
• Semi-transparent stain allows the wood grain to show through while still offering protection.
• Clear sealers provide minimal colour but protect against water and UV damage.

Choose a product made specifically for decks and exterior wood.

Step 5:

Apply in the Right Conditions

Ideal painting/staining weather is mild (10°C–25°C), dry, and not too sunny. Early morning or late afternoon works best.

Start by brushing stain or paint along the edges and between deck boards. Then use a roller, stain pad, or wide brush to coat the larger surfaces, working with the grain of the wood.

Apply one thin, even coat and let it dry fully before adding a second, if required.

Step 6:

Let It Cure

Drying time varies by product—most need 24–48 hours before light foot traffic. Wait at least 72 hours before placing furniture or planters back on the deck.

Refresh Your Outdoor Space the Right Way

A well-prepped, well-finished deck looks great and lasts longer. Whether you’re refreshing for the season or protecting new wood, the right process makes all the difference.

Not Sure What to Use?

Autohome carries a range of stains, sealers, and deck paints tailored to Canadian weather—plus pads, brushes, and expert tips for every type of deck. Bring in photos or measurements and we’ll help you get what you need.