Trex decking is a popular choice for outdoor spaces due to its durability and low maintenance requirements. However, it still needs regular cleaning to maintain its appearance and longevity. Using a pressure washer can be an effective method for cleaning Trex decking, but it requires caution and adherence to specific guidelines to avoid damage.
Recommended Pressure Washer Settings
To safely clean a Trex deck with a pressure washer, follow these guidelines:
- Pressure Setting: Use a pressure washer with a maximum pressure of 3100 PSI. This is the recommended pressure by Trex to avoid damaging the composite material. Exceeding this pressure can cause the surface to become pitted, discolored, or even crack the boards.
- Nozzle Selection: Choose a fan tip with a 40-60 degree spread to ensure even cleaning and minimize the risk of damage. A narrower nozzle with a higher pressure concentration can easily damage the deck surface.
- Distance and Technique: Keep the nozzle at least 8-12 inches away from the deck surface and move it in a steady, back-and-forth motion to avoid concentrating the pressure on a single spot. Holding the nozzle too close or staying in one area for too long can cause gouging or etching of the deck.
Cleaning Process
- Pre-Cleaning: Remove loose debris using a broom or leaf blower. This will help prevent the pressure washer from simply pushing the dirt and debris around, making the cleaning less effective.
- Soap and Water: Mix a mild, non-abrasive dish soap with warm water and apply it to the deck using a soft-bristle brush or broom. This helps loosen dirt, grime, and any built-up mildew or algae. Allow the soapy solution to sit for 5-10 minutes before rinsing.
- Rinse: Use a hose to thoroughly rinse the deck, ensuring all soap is removed. Leftover soap can leave a residue and cause streaking.
- Power Washing (Optional): If the deck requires more intense cleaning, use a pressure washer with the recommended settings and technique. Start with a test area to ensure the pressure and distance are appropriate before cleaning the entire deck.
Important Considerations
- Avoid Bleach and Acid: Never use products containing bleach or acid, as they can lighten the surface of Trex decking and cause discoloration. Stick to mild, pH-neutral cleaners specifically formulated for composite decking.
- Warranty: Damage caused by using high-pressure washing may not be covered under the Trex warranty. Exceeding the recommended pressure settings can void the warranty, so it’s crucial to follow the guidelines.
- Older Generation Decks: For early-generation Trex decks (pre-2009), semi-annual cleaning with a composite deck cleaner is recommended to prevent mold and mildew growth. These older decks may be more susceptible to damage from pressure washing.
Additional Tips
- Regular Maintenance: Clean your Trex deck regularly, at least once or twice a year, to prevent dirt and grime buildup. This will make the cleaning process easier and help maintain the deck’s appearance.
- Use Gentle Products: Stick to mild dish soap or specialized composite deck cleaners. Avoid harsh chemicals, abrasive scrubbers, or power tools that could damage the surface.
- Professional Assistance: If you are unsure about cleaning your Trex deck or if it requires extensive cleaning, consider consulting a professional pressure washing service. They have the expertise and equipment to safely and effectively clean your deck without causing any damage.
Conclusion
Cleaning a Trex deck with a pressure washer can be an effective way to maintain its appearance and longevity, but it requires careful attention to the recommended settings and techniques. By following the guidelines outlined in this comprehensive guide, you can safely and effectively clean your Trex deck using a pressure washer, ensuring it continues to look its best for years to come.
References
- Trex. (n.d.). How To Clean Composite Decking | Trex. Retrieved from https://www.trex.com/customer-support/trex-owners/care-and-cleaning/
- DecksDirect. (2020, June 26). Can I Use A Power Washer On Composite Decking? – DecksDirect. Retrieved from https://www.decksdirect.com/knowledge-builders/power-washing-composite-decking
- Trex Protect. (n.d.). Can You Pressure Wash Decking? – Trex Protect. Retrieved from https://trexprotect.com/uk/blog/why-you-shouldnt-pressure-wash-your-deck/
- Custom Deck Creations. (n.d.). How to Care For and Clean a Trex Deck (And What NOT to Do) – Custom Deck Creations. Retrieved from https://customdeckcreations.com/how-to-clean-a-trex-deck/
- Reddit. (2022, July 7). Successful Tips for Trex Deck : r/pressurewashing. Retrieved from https://www.reddit.com/r/pressurewashing/comments/vtoy93/successful_tips_for_trex_deck/