How to Clean Trex Decking?

If you’ve decided to install Trex composite decking, you already know that its superior durability is one of its greatest qualities.  Compared to regular wood decks, composite wood decking requires much less maintenance. However, like any outdoor structure, some basic cleaning and maintenance are still required.  To ensure your Trex deck remains in good condition (and maintains its warranty), there are some basic do’s and don’ts to consider when learning how to clean Trex decking.

Cleaning your Composite Wood Trex Decking

When it comes to cleaning your Trex deck, you can generally trust a simple dish soap and warm water remedy for most tasks.  A bucket of warm, soapy water and a soft bristle brush can be used to scrub away any dirt or debris that can’t be swept away with a broom.  Be sure to rinse or hose down the deck with clean water afterward to avoid the build-up of soap residue.  If you’re seeing water stains after rinsing, be sure to check the hardness of your water; rinsing with hard water may leave unsightly mineral deposits.  Hard water stains can be removed with white vinegar and rinsed with soft water.  You can also avoid water stains by patting the deck dry with a towel. For general maintenance, Trex recommends a semi-annual soap and water scrub to prevent seasonal pollens and molds from taking hold.  If you’ve spilled something such as food, oil, or grease on your Trex deck, be sure to clean the stain within seven days; a failure to do so could void your deck’s warranty.  If you’ve been working with concrete, cement, mortar, or stucco, be sure to use a concrete dissolver to remove any dust left on the deck surface; do NOT use water to remove concrete dust.

How to Clean Grime Buildup with Deck Brightener

For more stubborn stains and cleaning needs, Trex recommends using a deck brightener that contains oxalic or phosphoric acid.  This should be effective in combating grime buildup, tannins, water spots, rust, and other stubborn stains; you may need to let the deck brightener sit for 10-15 minutes for best results.  Use of acid or bleach-based products such as deck brighteners can lighten the overall color of your Trex deck, so be sure to test the product in an inconspicuous area first to be sure you’re satisfied with the color.

Protecting your Trex Deck Warranty 

There are a few things you should be sure to avoid when cleaning your Trex deck, as they may void your warranty.  Any damage caused through pressure washing may not be covered by the warranty, so it is best to avoid using a power washer to clean your Trex deck.  If you insist on pressure washing, be sure to use pressure less than 3100 psi, use a fan nozzle, and spray from at least 8 inches away from the deck surface to avoid damage.  Do not use acetone or other solvents on Trex decking.  Do not attempt to sand your Trex deck, as this will also void the warranty.

Contact The Professionals

While Trex decks are famous for their low-maintenance requirements, it is important to still practice basic cleaning procedures to ensure long-term quality.  If you have a cleaning question that we didn’t cover here, be sure to check the official Trex cleaning guide.  Here at Northwest Decks, we pride ourselves in delivering the highest quality deck services; whether you’re looking for deck inspections, repairs, or a fresh build, we have you covered.  Schedule an appointment today using our online form, or give us a call at 253.342.4688 or 360.731.8445