Trex decking is a popular choice for homeowners who want a durable and low-maintenance option for their outdoor living space. However, over time, your Trex deck may start to look dirty or stained. One question that many homeowners have is whether or not Trex decking can be washed with a pressure washer.

The answer is yes, Trex decking can be washed with a pressure washer, but it is important to use the right technique and equipment to avoid damaging the surface. Pressure washing your Trex deck can help remove dirt, debris, and stains, and restore its original appearance.

When pressure washing Trex decking, it is recommended to use a fan-tip nozzle instead of a narrow jet nozzle. This will help distribute the water evenly and prevent it from penetrating the surface. It is also important to use a pressure washer with a maximum pressure of 1500 psi to avoid damaging the deck.

Before pressure washing your Trex deck, it is a good idea to sweep off any loose dirt and debris. You can also use a mild soap and water solution to help remove stains and dirt. Once the deck is clean, you can begin pressure washing by working in small sections and keeping the nozzle about 8-12 inches away from the surface.

Benefits of Washing Trex Decking with a Pressure Washer

Keeping your Trex decking clean and well-maintained is essential for maintaining its appearance and longevity. While there are several methods available for cleaning Trex decking, using a pressure washer offers a range of benefits that make it a popular choice among homeowners.

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1. Efficient Cleaning

A pressure washer provides a powerful and concentrated stream of water that can quickly and effectively remove dirt, grime, and other debris from your Trex decking. This makes it much faster and more efficient than traditional cleaning methods such as scrubbing with a brush.

2. Deep Cleaning

The high-pressure water stream of a pressure washer can penetrate into the surface of the Trex decking, reaching even the toughest stains and grime that may have accumulated over time. This deep cleaning action helps to restore the deck’s original color and appearance.

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3. Time-Saving

Cleaning your Trex decking with a pressure washer can save you significant time and energy. The powerful water stream can cover large areas quickly, reducing the time it takes to clean the entire deck.

4. Prevents Future Damage

Regularly washing your Trex decking with a pressure washer helps to remove algae, mold, and mildew, which can cause long-term damage to the deck’s surface. By preventing the buildup of these contaminants, you can extend the lifespan of your decking.

However, it’s important to use your pressure washer correctly to avoid damaging the decking. Make sure to follow the manufacturer’s guidelines and adjust the pressure settings accordingly to ensure a safe and effective cleaning process.

A pressure washer can be a valuable tool for cleaning and maintaining your Trex decking. Its efficiency, deep-cleaning capabilities, time-saving benefits, and ability to prevent future damage make it an excellent choice for keeping your deck looking its best.

Effective Cleaning Solution

When it comes to cleaning your Trex decking, using a pressure washer can be an effective solution. However, it is important to use the right methods and settings to avoid damaging the surface of your deck.

First, you will want to choose a pressure washer with a fan tip nozzle rather than a pinpoint one. This will help distribute the water evenly and prevent any concentrated force that could harm the deck.

Next, make sure to adjust the pressure setting on your pressure washer to a lower level. Trex decking is a durable material, but it can still be damaged by excessive force. Aim for a pressure between 1000 and 1500 psi to effectively clean the surface without causing any harm.

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In addition to using a pressure washer, it is also recommended to use a cleaning solution to remove any dirt, stains, or mildew on the deck. There are many commercially available deck cleaners that are safe to use on Trex decking. Follow the manufacturer’s instructions for mixing the cleaner with water and applying it to the surface.

Once you have prepared the cleaning solution, apply it to the deck and let it sit for a few minutes to allow the cleaner to penetrate and break down any dirt or stains. Then, using a soft bristle brush or a mop, scrub the surface of the deck in a circular motion to remove any remaining dirt or debris.

After scrubbing the surface, rinse the deck thoroughly using the pressure washer. Be sure to keep the nozzle at a safe distance from the decking boards to avoid causing damage. Move in a sweeping motion, working from one end of the deck to the other to ensure even cleaning.

Finally, allow the deck to air dry completely before using it again. This will help prevent any potential damage from moisture or dampness.

By following these steps and using the right tools and cleaning solution, you can effectively clean your Trex decking with a pressure washer and keep it looking its best for years to come.

Time and Effort Saving

One of the biggest advantages of using a pressure washer to clean Trex decking is the time and effort it saves. Traditional methods of cleaning, such as scrubbing with a brush or using a hose, can be time-consuming and labor-intensive. With a pressure washer, you can quickly and easily clean larger areas of decking in a fraction of the time.

Additionally, a pressure washer can reach areas that are difficult to access with other cleaning methods. It can effectively remove dirt, grime, and other debris from the spaces between the deck boards, as well as from hard-to-reach corners and edges. This means that you can achieve a thorough clean without having to spend excessive time and effort.

Using a pressure washer also eliminates the need for harsh chemicals or cleaning agents. The powerful stream of water is often enough to remove stubborn stains and dirt, reducing the need for additional cleaning products. This not only saves you money, but it also makes the cleaning process more environmentally friendly.

  • Time-saving: Pressure washing Trex decking saves time compared to traditional cleaning methods.
  • Effort-saving: The power of the pressure washer makes it easier to remove dirt and grime.
  • Improved access: The pressure washer can reach difficult-to-access areas, resulting in a more thorough clean.
  • No need for harsh chemicals: The high-pressure water stream can remove stains without the use of additional cleaning products.
  • Cost and eco-friendly: Pressure washing eliminates the need for expensive and harmful cleaning agents.

Restoring the Deck’s Appearance

To restore your Trex decking’s appearance, you can follow these steps:

  1. Clean the deck: Start by removing any loose debris or dirt from the surface of the deck using a broom or leaf blower. This will help ensure an even cleaning process.
  2. Mix a cleaning solution: Prepare a solution of warm water and mild detergent. Be sure to use a detergent that is safe for use on composite decking. Avoid using bleach or harsh chemicals, as they can damage the deck’s surface.
  3. Apply the cleaning solution: Using a soft-bristle brush or mop, apply the cleaning solution to the deck in sections. Work in small areas to ensure thorough coverage and avoid drying of the cleaning solution.
  4. Scrub the deck: Gently scrub the deck with the brush or mop, paying extra attention to any stubborn stains or areas of heavy dirt accumulation. Avoid using abrasive scrub brushes, as they can scratch the deck’s surface.
  5. Rinse the deck: Once you have scrubbed the entire deck, rinse off the cleaning solution using a garden hose or pressure washer. Set the pressure washer to a low setting to avoid damaging the deck’s surface.
  6. Dry the deck: Allow the deck to air dry completely before using it. This will help prevent any moisture-related issues and ensure a clean, dry surface for the next step.
  7. Apply a protective sealant: After the deck has dried, you can apply a protective sealant to enhance its appearance and provide long-lasting protection against UV rays and moisture. Follow the manufacturer’s instructions for the best results.
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By following these steps, you can restore the appearance of your Trex decking and keep it looking beautiful for years to come.

Removing Tough Stains

If your Trex decking has tough stains that cannot be removed with regular cleaning methods, you may need to use a pressure washer to help loosen and remove the stains. However, it is important to note that using a pressure washer on Trex decking can potentially cause damage if not done correctly.

Before using a pressure washer, make sure to consult the manufacturer’s instructions for your specific Trex decking product. Some products may not recommend using a pressure washer at all, while others may provide specific guidelines for safe use.

When using a pressure washer, it is crucial to use the right level of pressure and the correct nozzle. Start with the lowest pressure setting and test it on a small inconspicuous area of your decking to ensure that it doesn’t cause any damage. If the pressure is too high, it can strip away the protective outer layer of the decking and leave it vulnerable to further damage.

When tackling tough stains, it may be helpful to use a mild detergent or a specialized deck cleaner in combination with the pressure washer. Apply the cleaner evenly on the stained area and then use the pressure washer to rinse it away. Remember to follow the manufacturer’s instructions for the cleaner and pay attention to any safety precautions.

For particularly stubborn stains, you may need to repeat the process or consider using a stain remover that is specifically formulated for composite decking. Again, always follow the manufacturer’s instructions and test the product on a small area first to ensure that it doesn’t cause any discoloration or damage to the decking.

After using a pressure washer, it is essential to thoroughly rinse off your Trex decking with clean water to remove any detergent or cleaner residue. Allow the decking to dry completely before using it again.

Remember, prevention is always better than cure. Regularly cleaning your Trex decking and promptly addressing any spills or stains can help prevent the need for intense scrubbing or pressure washing in the first place.

If you are unsure about using a pressure washer or have concerns about potential damage, it is always best to consult a professional or contact Trex customer support for guidance.

Preventing Mold and Mildew Growth

Mold and mildew can be a common problem on outdoor surfaces, including Trex decking. However, there are several steps you can take to prevent the growth of mold and mildew and keep your deck looking its best.

Keep Your Deck Clean

Regular cleaning is key to preventing mold and mildew growth on your Trex decking. Sweep the deck regularly to remove dirt, debris, and organic matter that can provide a breeding ground for mold and mildew. Use a soft-bristle brush to scrub the deck with a mild detergent and water solution at least twice a year. This will help remove any grime or residue that may promote mold growth.

Control Moisture Levels

Mold and mildew thrive in damp environments, so it’s important to control moisture levels on your deck. Make sure the deck has proper drainage to prevent water from pooling and sitting on the surface. Trim back any nearby plants or trees that may be blocking sunlight and preventing the deck from fully drying after rain or dew. Additionally, avoid using excessive amounts of water when cleaning your deck, as this can contribute to moisture buildup.

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If you live in a humid climate or your deck is in a shaded area, consider using a deck sealer or waterproofing product to provide an extra layer of protection against moisture.

Note: Trex decking is designed to be resistant to mold and mildew growth, but regular maintenance and proper care are still necessary to ensure its longevity.

Increasing the Lifespan of the Decking

While cleaning your Trex decking with a pressure washer can help remove dirt and stains, there are some additional steps you can take to increase the lifespan of your decking:

1. Regularly Sweep and Rinse

Maintaining a regular cleaning routine is crucial for keeping your Trex decking in good condition. Sweep the decking regularly to remove debris, such as leaves, branches, and dirt. Use a garden hose to rinse the decking off to prevent any build-up.

2. Remove Stains Promptly

If you notice any stains on your Trex decking, remove them as soon as possible. Wipe away any spills or stains using a mild detergent and a soft cloth or sponge. Avoid using abrasive cleaners or scrub brushes, as they can damage the surface of the decking.

Remember, prevention is key when it comes to ensuring the longevity of your Trex decking. Avoid placing hot objects directly on the surface, as they can cause discoloration. Use caution when moving heavy furniture or equipment, as dragging them across the decking can leave scratches.

Additionally, be mindful of any plants or vegetation near your decking. Trim back overhanging branches to allow for proper airflow and prevent moisture buildup, which can lead to mold and mildew growth.

By following these guidelines and regularly maintaining your Trex decking, you can significantly increase its lifespan and enjoy its beauty for years to come.


Can I use a pressure washer to clean my Trex decking?

Yes, you can use a pressure washer to clean your Trex decking. However, you need to be careful not to use too much pressure, as it can damage the surface of the decking. It is recommended to use a pressure washer with a fan tip and set it to a low pressure setting before starting the cleaning process.

What type of pressure washer should I use to clean Trex decking?

It is recommended to use a pressure washer with a maximum of 3100 psi (pounds per square inch) and a fan tip nozzle. This will provide enough pressure to clean your Trex decking effectively without causing any damage. Avoid using a turbo or rotating nozzle, as these can be too powerful and may cause surface damage.

Can I use a pressure washer to remove stains from my Trex decking?

Yes, a pressure washer can be used to remove stains from Trex decking. However, it is important to use the right cleaning solution along with the pressure washer for best results. Trex recommends using a composite deck cleaner or a mix of mild soap and warm water. Apply the cleaner to the stained area, let it sit for a few minutes, and then gently scrub with a soft-bristle brush before rinsing with a pressure washer.

Are there any precautions I should take when using a pressure washer on Trex decking?

Yes, there are a few precautions you should take when using a pressure washer on Trex decking. First, make sure to start with a low pressure setting and test it on a small inconspicuous area of the decking to ensure it doesn’t cause any damage. Also, keep the pressure washer nozzle at least 8-10 inches away from the surface of the decking and move it in a sweeping motion to avoid any concentrated pressure in one spot. Finally, be sure to wear protective eye goggles and gloves while using a pressure washer.