How to Clean Composite Decking in 6 Easy Steps

Maintaining your composite decking is essential to keeping it looking great year-round. Not only does regular cleaning help preserve the beauty of your deck, but it also extends its lifespan by preventing the buildup of dirt, grime, and stains. One of the many advantages of composite decking is its ease of maintenance—no need to worry about sanding, staining, or sealing like you would with wood decking. 

In this guide, we’ll walk you through six simple steps to clean composite decking and ensure it stays in top condition.

Before you begin, it’s essential to gather all the necessary cleaning supplies. The right tools will make the process smoother and help protect your decking from damage. Here’s what you’ll need:

• Soft-bristle deck brush
• Mild detergent or composite deck cleaner
• Garden hose or pressure washer (set to a low pressure)
• Bucket
• Sponge or soft cloth

Using the appropriate cleaning products and tools is crucial to avoid scratches or other damage to your composite decking. For example, harsh chemicals or stiff brushes can harm the surface, leading to unnecessary wear and tear. Stick with a mild detergent or a specialized composite deck cleaner designed for this material to ensure a safe and effective cleaning process.

If you are new to this material, it’s worth understanding what composite decking is to better appreciate its benefits.

The first actual step in cleaning composite decking is to clear away any loose debris from the deck surface. This includes leaves, dirt, and any other objects that may have accumulated. A broom or a leaf blower works well for this task, allowing you to quickly and efficiently remove surface debris without causing any damage.

It’s essential to remove debris regularly, especially in the fall when leaves tend to pile up. Debris left on the deck can trap moisture, which may lead to mold or mildew growth over time. By staying on top of this simple task, you can keep your composite deck looking fresh and clean.

Once you’ve cleared the deck of debris, the next step is to give it a good rinse. Using a garden hose is usually sufficient, but if you have a pressure washer, set it to a low setting to avoid damaging the deck surface. Start at one end of the deck and work your way across, making sure to rinse thoroughly.

Rinsing helps remove any loose dirt or particles that may not have been swept away earlier. It’s also a great way to prep the surface for the next step, ensuring that the cleaning solution can do its job effectively. Remember, a thorough rinse can prevent dirt from becoming embedded in the composite material, making the overall cleaning process easier.

Now that your deck is free of debris and has been rinsed, it’s time to apply the cleaning solution. Mix your mild detergent or composite deck cleaner with water according to the manufacturer’s instructions. Once mixed, use a soft-bristle deck brush to apply the solution to the deck, scrubbing gently to lift any dirt or stains.

Be sure to work in small sections to prevent the cleaning solution from drying out before you’ve had a chance to scrub. Pay extra attention to areas with more foot traffic, as these spots tend to accumulate more dirt and grime.

If you’re unsure about the costs associated with maintaining composite decks, it’s useful to explore how much composite decking costs. For an affordable and durable decking option, check out our Helios Deck Tiles.

Spot Cleaning Stubborn Stains

For those stubborn stains that just won’t budge, like grease, wine, or mold, spot cleaning may be necessary. Use a composite deck cleaner specifically designed for tough stains and apply it directly to the affected area. Let it sit for a few minutes to penetrate the stain before scrubbing with a soft brush.

In some cases, a gentle power wash may help lift the stain, but be cautious with the pressure to avoid damaging the decking. Always follow the cleaner’s instructions and rinse thoroughly after spot cleaning to ensure no residue is left behind.

After applying the cleaning solution and addressing any stubborn stains, it’s time to rinse your composite decking once more. Using your garden hose or pressure washer on a low setting, rinse off all the cleaning solutions. Be sure to remove all soap residues, as any leftover cleaner can leave a film on the decking surface or attract dirt.

Once you’ve rinsed the entire deck, take a moment to inspect it. Look for any missed spots or lingering stains that may need a little extra attention. If you spot any, simply repeat the spot-cleaning process until your deck is spotless.

To keep your composite decking looking its best, regular maintenance is critical. Here are some tips to help you maintain your deck:

• Sweep Regularly: Sweep your deck regularly to keep it free of leaves, dirt, and other debris. This simple step can prevent stains and reduce the risk of mold and mildew growth.
• Rinse After Spills: If you spill something on your deck, especially food, drinks, or oils, rinse it off as soon as possible to prevent staining. Use the right cleaning product to avoid any issues.
• Use a Protective Mat: Consider using a protective mat under grills or outdoor furniture to catch spills and prevent scratches on the deck surface.
• Avoid Harsh Chemicals: Stick to mild detergents and avoid using bleach or other harsh chemicals that could damage the decking material.
• Install Drainage Tiles: Adding drainage tiles beneath your deck can improve water flow and prevent water from pooling on your decking surface, which can lead to long-term damage.
• Schedule Annual Deep Cleaning: Follow the steps outlined in this guide to give your deck a thorough cleaning at least once a year. You can also invest in power washing or pressure washing services annually.
• Upgrade to Composite Deck Tiles: For a quick refresh or added protection, consider using composite deck tiles. These are easy to install and provide an extra layer of durability and style.

If you’re considering a new deck, learning how to install composite decking might be beneficial for a seamless installation process.

Whether you’re working with a wood deck, Trex deck, or other composite deck boards, this cleaning guide will help you maintain your deck boards and deck railing. If you are looking for quality, easy-to-maintain composite decks, check out Flooring Inc.'s collections. Our wide range of composite decking products is designed to make outdoor living a breeze.

Sources

Accuracy is important to us. That’s why all of our content is vetted by flooring experts with more than 13 years of combined experience in the field. We also work to source information directly from flooring manufacturers.

Trex Protect. Homemade Composite Deck Cleaner: Revive Your Deck’s Beauty. https://trexprotect.com/blog/homemade-composite-deck-cleaner/