Washington State’s winters are generally mild, but the wet, rainy conditions and occasional snowfall can still take a toll on your deck. If you have a composite deck, proper winter maintenance is crucial to prevent moisture buildup, mold growth, and surface wear. Follow these essential tips to keep your deck in shape throughout the colder months.
- Clear Off Leaves and Debris
Fallen leaves, pine needles, and debris can trap moisture and promote mold and mildew growth.
Best Practice: Sweep your deck regularly, especially before heavy rain or snow.
Bonus Tip: Use a leaf blower or soft-bristle broom to avoid scratching the surface.
- Clean Your Composite Deck Before Winter Sets In
Dirt and grime can become more challenging to remove once the temperature drops.
Use a Composite Deck Cleaner: Mild soap and water are usually enough, but a specialized cleaner can help remove stains and mildew.
Avoid Harsh Chemicals: Bleach and ammonia-based cleaners can damage the composite material.
Use a Soft Brush: Avoid using metal bristles that can scratch the surface.
- Check for Water Drainage Issues
Standing water can lead to slippery surfaces and potential damage over time.
Ensure gutters and downspouts direct water away from your deck.
Remove any obstructions between deck boards to allow proper drainage.
While composite decking is resistant to moisture, preventing prolonged exposure is still best for longevity.
- Keep Your Deck Free of Ice and Snow
Although heavy snow isn’t common in most parts of Washington, managing ice buildup is still essential.
Safe Ice Removal: Use a plastic shovel (not metal) to prevent scratching.
Avoid Rock Salt: It can leave a residue and affect the composite surface.
Use Calcium Chloride or Sand: These provide traction without harming the deck material.
- Protect Your Deck Furniture
Rain and moisture can cause damage to outdoor furniture and accessories.
Store Cushions Indoors: Prevent mold and mildew growth.
Use Waterproof Covers: Protect furniture from excess moisture.
Raise Furniture Off the Deck: This improves airflow and prevents trapped moisture.
- Inspect Your Deck for Structural Issues
Even though composite decking is highly durable, winter weather can worsen issues.
Check for loose fasteners or railings.
Look for signs of mold growth in damp, shaded areas.
Schedule any necessary repairs before winter storms make the problem worse.
- Avoid Excess Moisture Exposure
Washington’s climate makes decks especially prone to moisture retention.
Trim Overhanging Branches: This prevents excess shade and allows your deck to dry faster.
Use a Dehumidifier in Covered Areas: If your deck has a roof or enclosed section, reduce moisture buildup with a small dehumidifier.
Keep Rugs and Mats Dry: Wet rugs can trap moisture and lead to mold underneath.
- Plan for Spring Maintenance
Taking care of your deck in winter makes spring maintenance easier.
Start planning any refinishing or upgrades you want to make.
Keep an eye on your deck’s condition so you can address any emerging issues quickly.
- Enjoy the Benefits of Composite Decking
Unlike traditional wood decks, composite decking is designed to withstand Washington’s wet climate with minimal maintenance. Benefits include:
No Need for Sealing or Staining – Composite materials don’t require yearly waterproofing.
Mold and Mildew Resistance – Less risk of decay compared to natural wood.
Easy Cleaning – Just a quick wash keeps it looking great year-round.
- Consider Professional Maintenance
If you’re unsure about drainage solutions or need a thorough winter prep, a professional deck service can help.
Benefits: Expert inspection, proper cleaning, and long-term maintenance planning.
When to Call: If you notice significant wear, water damage, or structural instability.
Washington State’s wet winters require proactive deck maintenance, even for composite decks. You can enjoy a beautiful and durable deck all year long by cleaning, inspecting, and managing moisture properly.