Can You Power Wash Trex Decking?

Trex decking is renowned for its durability, low maintenance, and aesthetic appeal. As a composite decking material, Trex combines wood fibers and recycled plastics, offering the look of wood with enhanced longevity and resistance to the elements.

One common question among Trex deck owners is whether power washing is a safe and effective method for cleaning this type of decking. In this post, we’ll explore the dos and don’ts of power washing Trex decking and provide some alternative cleaning methods to keep your deck looking pristine.

Understanding Trex Decking

Before diving into the specifics of power washing, it’s important to understand what Trex decking is. Trex is a composite decking material made from 95% recycled materials, including plastic film and reclaimed wood. This composition gives Trex its robust properties, making it resistant to rot, splintering, and insect damage. However, like any outdoor surface, it can accumulate dirt, debris, and mildew over time.

Is Power Washing Safe for Trex Decking?

The short answer is yes, you can power wash Trex decking, but with caution. Power washing can be an effective method for removing dirt and grime, but improper use can damage the decking surface. Here are some key considerations:

1. Use the Right Pressure Setting

  • Pressure Level: Keep the pressure below 3100 psi. High pressure can cause damage to the deck surface, leading to scratches or gouges.
  • Nozzle Choice: Use a fan attachment or a wide-angle spray tip (25-40 degrees) to distribute the water evenly and reduce the risk of damage.

2. Maintain a Safe Distance

  • Distance from Decking: Keep the nozzle at least 8-12 inches away from the surface. Too close of an approach can concentrate the pressure on a small area and cause damage.

3. Angle and Technique

  • Spray Angle: Maintain a consistent angle, ideally 30 degrees, to ensure even cleaning.
  • Steady Movement: Move the power washer in a consistent, sweeping motion, avoiding lingering in one spot.

4. Avoid Using Heated Water

  • Water Temperature: Use cold water, as heated water can cause the composite material to expand and contract, potentially leading to warping.

Step-by-Step Guide to Power Washing Trex Decking

  1. Preparation
    • Remove all furniture, planters, and debris from the deck.
    • Sweep the deck to remove loose dirt and leaves.
  2. Spot Cleaning
    • Apply a mild soap or commercial deck cleaner approved for Trex decking to stains and tough spots.
    • Use a soft-bristle brush to scrub these areas gently.
  3. Power Washing
    • Set up the power washer with the appropriate nozzle and pressure settings.
    • Start from one end of the deck and work systematically across the boards.
    • Maintain a steady pace, and ensure water does not pool on the deck.
  4. Rinse Thoroughly
    • Once power washing is complete, rinse the deck thoroughly to remove any soap residue.
    • Allow the deck to dry completely before replacing furniture and other items.

Alternative Cleaning Methods

For those who prefer not to use a power washer, there are other effective ways to clean Trex decking:

1. Soft Bristle Brush and Soap

  • Use a soft bristle brush with a mild soap solution to scrub the deck gently.
  • This method is ideal for routine cleaning and removing surface dirt.

2. Commercial Deck Cleaners

  • Opt for deck cleaners specifically designed for composite decking.
  • Follow the manufacturer’s instructions for best results.

Tips for Maintaining Trex Decking

  • Regular Sweeping: Keep the deck free of leaves and debris to prevent mold growth.
  • Spot Cleaning: Address spills and stains promptly to prevent permanent marks.
  • Avoid Harsh Chemicals: Steer clear of bleach and other harsh chemicals that can damage the composite material.

Conclusion

Power washing Trex decking is a viable option if done with care and attention to detail. By following the guidelines outlined above, you can effectively clean your deck without risking damage. Remember, regular maintenance and gentle cleaning methods are key to preserving the beauty and longevity of your Trex deck. Whether you choose to power wash or use alternative cleaning methods, keeping your deck clean will ensure it remains a beautiful and functional part of your outdoor living space for years to come.

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