Composite Deck Cleaner: 6 DIY Tips & Safe Products

Finding the right composite deck cleaner can make all the difference in keeping your outdoor living space looking its best. Composite decking is known for its low maintenance and durability, but like any surface exposed to the elements, it needs occasional cleaning to preserve its color and texture. The good news is, with the right approach, maintaining your deck in places like Gresham and surrounding areas is simple and effective.

• Eco-friendly care: Composite-safe cleaners protect your deck and the environment.
• DIY options: You can make effective cleaners with common household ingredients.
• Professional-grade results: Proper products and methods ensure lasting beauty.

Let’s explore the best ways to clean composite decking safely and effectively using both DIY methods and trusted store-bought solutions.

Why Composite Deck Cleaning Is Important

Composite decks are designed to resist mold, mildew, and fading, but regular cleaning is still essential. Dirt, pollen, and organic buildup can lead to discoloration and slippery surfaces if ignored.

Preserving Durability and Color

Composite decking includes a protective shell that guards against weather and UV rays. However, grime and organic matter can dull its finish over time. Cleaning helps maintain that original luster and color for decades.

Preventing Mold and Algae Growth

Oregon’s wet climate makes decks particularly prone to organic growth. Routine cleaning keeps your deck safe to walk on and prevents mildew stains from taking hold.

Extending the Deck’s Lifespan

Regular maintenance not only improves appearance but also extends the life of your deck. A clean deck surface prevents trapped moisture and ensures long-term performance.

• Longevity: Prevents early wear caused by trapped dirt and debris.
• Safety: Reduces the risk of slipping due to algae or mildew.
• Curb appeal: Keeps your outdoor space fresh and inviting.

Essential Tools and Supplies

Before you start cleaning, make sure you have the proper tools and materials ready. Using the right equipment ensures you won’t accidentally damage your decking.

• Soft-bristle brush: Gentle on composite surfaces but tough on grime.
• Bucket or spray bottle: For mixing and applying cleaning solutions.
• Garden hose with spray nozzle: Ideal for rinsing away residue.
• Microfiber mop or towel: Helps with drying or wiping smaller areas.
• Protective gloves: Keeps your hands safe from cleaning agents.

6 DIY Composite Deck Cleaner Tips

Creating your own composite deck cleaner can be both effective and budget-friendly. These simple recipes use household items to deliver professional-level results without harsh chemicals.

1. Soap and Water Solution

The simplest and safest cleaning solution for composite decking is mild dish soap and warm water.

• Recipe: Mix one gallon of warm water with one cup of mild dish soap.
• How to use: Scrub with a soft-bristle brush, then rinse thoroughly.
• Best for: Routine maintenance and light dirt buildup.

2. White Vinegar and Baking Soda

This natural combo is excellent for removing mildew or light stains.

• Recipe: Mix two cups of vinegar in one gallon of water. Sprinkle baking soda directly on stains before scrubbing.
• How to use: Let the mixture sit for 15 minutes, then rinse clean.
• Best for: Organic stains, mold, and mildew prevention.

3. Oxygen-Based Cleaner

Oxygen bleach is a safe and powerful option that won’t damage composite materials.

• Recipe: Mix oxygen bleach powder with warm water according to the label.
• How to use: Apply to deck surface, let sit for 10 minutes, then scrub and rinse.
• Best for: Deep cleaning after winter or heavy buildup.

4. Lemon Juice for Spot Cleaning

Lemon juice naturally removes light stains and discoloration caused by food or beverages.

• Recipe: Use pure lemon juice on the stain and scrub with a sponge.
• How to use: Let it sit for 5 minutes before rinsing thoroughly.
• Best for: Small spills or rust marks.

5. Vinegar and Dish Soap Combo

Combining vinegar and dish soap creates a gentle, grease-cutting cleaner.

• Recipe: Mix 1 gallon of water, 1 cup of vinegar, and ½ cup of dish soap.
• How to use: Scrub evenly across the deck, then rinse.
• Best for: Removing grime from outdoor cooking or traffic-heavy areas.

6. Club Soda for Fresh Spills

Club soda’s carbonation helps lift fresh stains before they set in.

• Recipe: Pour club soda directly onto the spill.
• How to use: Let bubble for a minute, then blot with a soft cloth.
• Best for: Immediate cleanup of wine, juice, or sauce spills.

Safe Store-Bought Composite Deck Cleaners

If you prefer ready-to-use products, several high-quality cleaners are designed specifically for composite decking. Always check that the label states it’s safe for Trex or composite materials.

Trex DeckCleaner

Formulated by Trex for its composite decking, this cleaner removes dirt, mold, and grease without harming the deck surface. It’s ideal for both spot and deep cleaning.

Simple Green Oxy Solve Deck and Fence Cleaner

This eco-friendly product uses peroxide-based cleaning power. It works well for removing algae, mildew, and grime while being gentle on the environment.

Olympic Premium Deck Cleaner

A versatile choice that can tackle mildew, dirt, and stains on composite and wood decks alike. It’s also fast-acting and easy to rinse off.

• Composite safe: Designed for all capped composites.
• Low toxicity: Won’t harm plants or pets when used as directed.
• Easy application: Can be used with a sprayer or scrub brush.

Best Practices for Cleaning Composite Decking

Consistency is key to keeping your deck looking its best. Follow these best practices for safe and effective cleaning.

Clean Regularly

A quick rinse every few weeks and a deep clean twice a year will prevent buildup and discoloration.

Avoid Harsh Chemicals

Skip bleach, ammonia, or chlorine-based cleaners—they can damage your deck’s surface and protective coating.

Use Gentle Pressure

If you choose to pressure wash, keep the pressure under 3100 PSI and maintain a distance of at least 8 inches from the surface.

• Check the weather: Clean your deck on a mild, overcast day to avoid streaking.
• Test first: Always test cleaners in a small, hidden area.
• Dry thoroughly: Let the deck air dry before replacing furniture.

When to Call a Professional

Sometimes, your deck may need more than a DIY cleaning—especially if stains have set in or drainage issues are causing repeated buildup.

Benefits of Professional Cleaning

• Specialized products: Experts use commercial-grade composite-safe cleaners.
• Time efficiency: Professional cleaning covers large decks quickly.
• Inspection included: Identifies any structural or material issues early.

Why Gresham Homeowners Choose Boss Exteriors

Boss Exteriors is trusted throughout Gresham and surrounding areas for composite decking care, repair, and installation. Our trained professionals know how to select the right composite deck cleaner and use safe, proven methods that extend the life and look of your deck.

• Local expertise: Knowledge of Oregon’s weather challenges and composite materials.
• Eco-conscious cleaning: Use of environmentally responsible products.
• Exceptional service: Attention to detail on every project, big or small.

Keep Your Deck Looking New with the Right Cleaner

Choosing the right composite deck cleaner, and using it properly, can keep your outdoor space looking flawless year-round. Whether you prefer DIY solutions or professional products, the key is regular care and safe techniques that protect your investment.

If your deck needs a deeper clean or professional touch, Boss Exteriors is here to help. We proudly serve homeowners in Gresham and surrounding areas with expert deck maintenance and installation services.

Contact Boss Exteriors today to schedule your deck evaluation and keep your outdoor space beautiful for years to come.