Your deck is more than just an outdoor surface—it’s a space for grilling, gathering, and making memories. But over time, exposure to sun, rain, dirt, and mildew can leave it looking weathered and worn. Whether your deck is wood, composite, or pressure-treated, regular cleaning is the key to maintaining its beauty and extending its lifespan.
At Arca Construction, we know that a well-maintained deck looks better, lasts longer, and provides a safer space for your family. Here’s everything you need to know about the best way to clean your deck—step by step.
Why Cleaning Your Deck Matters?
Cleaning your deck isn’t just about appearance. It also helps:
- Prevent mold and mildew growth that can make the surface slippery
- Remove dirt and grime that breaks down finishes and stains the wood
- Prepare the surface for staining, sealing, or painting
- Extend the life of your decking materials by reducing moisture-related damage
Whether you’re doing a quick spring cleaning or prepping for a big backyard party, cleaning your deck should be part of your annual maintenance routine.
Step 1: Clear the Deck
Start by removing everything from the deck surface:
- Outdoor furniture
- Rugs or mats
- Planters and decorations
- Debris like leaves and branches
This gives you full access to the surface and prevents trapped moisture from damaging the wood.
Step 2: Sweep and Remove Debris
Use a sturdy outdoor broom to sweep away dirt, leaves, and twigs. Pay close attention to corners, gaps between boards, and areas near railings. If your deck boards are spaced, use a putty knife or scraper to clean out debris lodged between them.
Keeping the surface clear helps your cleaner work better and allows for proper drainage.
Step 3: Choose the Right Cleaner
Different deck materials call for different cleaners:
- Wood decks: Use a wood-specific or oxygenated cleaner that’s safe for natural fibers. Avoid harsh chlorine bleach, which can damage wood and nearby plants.
- Composite decks: Use a composite-safe cleaner or a mild soap-and-water solution to remove mildew and stains without damaging the surface.
- Pressure treated wood: Mild detergents, vinegar solutions, or commercial deck cleaners are usually safe—but skip the bleach.
If you're unsure what type of cleaner is best for your deck, Arca Construction can recommend safe and effective products based on your materials.
Step 4: Scrub or Spray
Apply your cleaner following the product instructions. Then either:
- Scrub manually using a long-handled, soft-bristle brush, working in sections and scrubbing with the grain of the wood, or
- Use a pressure washer carefully, set to a low to medium pressure (500–1200 PSI). Always keep the nozzle moving and hold it at least 12 inches from the deck surface to avoid gouging the wood.
Don’t forget to clean railings, steps, and under the deck if needed.
Step 5: Rinse Thoroughly
Once you’ve scrubbed the entire surface, rinse with a garden hose or pressure washer to remove all cleaner residue. Lingering soap or chemicals can affect the finish of your deck and create a slippery surface.
Make sure the water runs off completely—standing water can lead to mildew and rot.
Step 6: Let It Dry
Allow your deck to dry completely—usually 24 to 48 hours, depending on the weather. This is especially important if you plan to apply a new coat of stain, sealant, or paint afterward.
During this time, inspect the deck for:
- Loose nails or screws
- Warped or cracked boards
- Signs of rot or insect damage
Bonus Tips for Long-Term Deck Maintenance
- Sweep weekly during heavy leaf fall or pollen season
- Rinse spills immediately, especially grease or red wine
- Apply sealant or stain every 1–3 years, depending on your deck type
- Trim nearby plants to reduce moisture and debris buildup
A clean deck is a happy deck—and it’s a lot more enjoyable for relaxing, entertaining, and soaking up the sunshine. Read on to learn how to create extra entertainment space below your existing deck.
Need Professional Help?
Whether your deck needs a deep clean, structural repair, or a total makeover, Arca Construction is your go-to expert for outdoor living spaces. We specialize in custom deck builds and maintenance plans that keep your deck looking and performing its best year-round.
Contact us today or call (540) 413-4860 to schedule a consultation. Browse more helpful tips on the Arca Construction Blog or explore the Arca Construction website to learn how we can bring your backyard vision to life.
Let’s make your deck a clean, safe, and stunning space for all your outdoor moments.