Composite decks are known for being low-maintenance, but that doesn’t mean no maintenance. While they require far less upkeep than traditional wood decks, composite materials still benefit from regular care to preserve their look, performance, and longevity.
At Arca Construction, we love building composite decks that combine durability with style. Whether you’ve just installed a new deck or have one that’s been through a few seasons, these composite deck maintenance tips will help keep it looking and performing its best.
Why Choose Composite Decking?
Composite decking is made from a mix of recycled wood fibers and plastics, creating a material that resists rot, splintering, and insect damage. Popular brands like Trex, TimberTech, and Fiberon offer a variety of colors and finishes that mimic the natural beauty of wood, without the sanding, staining, or sealing.
Even though composite decks are built to last, they still need occasional cleaning and attention. Let’s dive into the best ways to care for them.
Tip 1: Sweep Regularly to Prevent Buildup
Leaves, dirt, and pollen can accumulate on the surface of your composite deck and lead to staining or mildew over time. Make it a habit to:
- Sweep your deck weekly with a soft broom
- Clear debris from between deck boards using a putty knife or narrow tool
- Trim nearby trees or shrubs to reduce the amount of debris landing on your deck
This simple routine keeps your deck cleaner and helps prevent organic buildup that could lead to mold.
Tip 2: Wash Seasonally with Gentle Cleaners
You don’t need harsh chemicals to clean your composite deck. Most stains and dirt can be removed with:
- Warm water
- Mild dish soap
- A soft-bristle brush or deck broom
Mix your solution in a bucket, scrub gently, and rinse thoroughly with a hose. Avoid power washing at high pressure unless the manufacturer specifically recommends it—most advise staying below 1,500 PSI and keeping the nozzle at least 12 inches from the surface.
Tip 3: Treat Stains Promptly
While composite decking resists most stains, spills from food, grease, wine, or suntan lotion can still cause issues if not cleaned quickly. For best results:
- Blot spills immediately with a paper towel or cloth
- Clean the area with soapy water and a soft brush
- Rinse thoroughly to remove all residue
For tougher stains like grease or oil, use a composite-safe cleaner designed for your specific brand of decking. Avoid products with bleach or harsh solvents, which can damage the deck’s surface.
Tip 4: Prevent Mold and Mildew
Composite decks are moisture-resistant but not immune to mildew, especially in shaded or damp areas. To minimize mold growth:
- Keep the deck surface and gaps clean and dry
- Ensure good drainage underneath the deck
- Clean the deck thoroughly in spring and fall
- Use a vinegar-water solution or composite-friendly mold remover if needed
If your deck is surrounded by dense plants or located in a humid area, consider increasing ventilation or adding a skirt with airflow gaps.
Tip 5: Avoid Scratches and Heat Damage
Composite decks are durable, but not indestructible. To protect the surface:
- Use outdoor rugs with a backing that won’t trap moisture or scratch the boards
- Avoid dragging furniture—use protective pads on chair and table legs
- Don’t place hot grills or fire pits directly on the deck without a heat shield
Some darker-colored boards can also get very warm in direct sun, so keep that in mind when choosing your materials or planning shaded areas.
Tip 6: Inspect and Maintain Fasteners
Composite decks often use hidden fasteners or specialized screws. Check your deck annually for:
- Loose or raised fasteners
- Warped or shifted boards (rare, but possible with temperature changes)
- Any hardware corrosion, especially near water or in coastal areas
Tighten or replace fasteners as needed to keep your deck safe and secure.
Tip 7: Don’t Paint or Stain Your Composite Deck
Unlike wood, composite decking doesn’t need painting or staining—and doing so can void the warranty. If your deck fades slightly over time (a normal process for most composite brands), it will do so uniformly. Stick with routine cleaning to maintain its color and finish.
Bonus: Know Your Brand’s Guidelines
Each composite decking brand has specific recommendations for cleaning and care. Visit the manufacturer’s website or refer to product literature for:
- Approved cleaning solutions
- Power washing instructions (if allowed)
- Warranty details related to maintenance
When in doubt, Arca Construction is happy to help you identify your deck type and advise on best practices.
Build It Right. Keep It Beautiful.
Composite decks offer long-term value and a polished, modern look with minimal upkeep. With just a little regular care, your deck will stay as stunning and sturdy as the day it was installed.
Need help with composite deck maintenance or thinking about building one? Arca Construction is your go-to team for premium outdoor living solutions.
Contact us today or call (540) 413-4860 to schedule a consultation.
For more expert tips, visit our blog or check out our full range of services on the Arca Construction homepage.
Let’s build and maintain the perfect deck—designed to last and made to enjoy.