Can You Pressure Wash Trex Composite Decks
GET A FREE QUOTE
Trex composite decking is known for its durability and low maintenance, but many homeowners who think they need to spend hundreds if not thousands of dollars on a professional deck resurfacing company typically wonder if simply pressure washing is a safe way to clean it without breaking the bank. While pressure washing can be effective, using too much force can cause damage such as scarring, chipping, or voiding the deck’s warranty. High-pressure water can strip away protective coatings and leave the deck vulnerable to the elements.
The key to safely pressure washing Trex composite decking is using the right settings and techniques. If done incorrectly, the powerful jet can gouge the material and create permanent marks. However, when done with proper precautions, pressure washing can be an efficient way to restore your deck’s original appearance.
What is the Best Way to Clean Trex Composite Decking?
The best way to keep your Trex composite deck clean is through regular maintenance. Dirt, pollen, and everyday grime can accumulate over time, making your deck look dull. To maintain its fresh look, sweep the deck at least once a week and rinse it with water. For a more thorough cleaning, follow these steps:
Sweeping and Debris Removal – Use a broom or leaf blower to clear leaves, dirt, and other debris. This prevents organic material from accumulating in the grooves and fostering mold growth.
Mild Cleaning Solution – Mix warm water with a gentle dish soap to create an effective, non-abrasive cleaning solution.
Scrubbing with a Soft Brush – Using a soft-bristle brush, scrub the deck along the grain to lift any stubborn dirt.
Rinsing Thoroughly – Use a garden hose to rinse off the soap and any remaining debris.
Drying – Let the deck air dry completely before placing furniture or accessories back on it.
Regular cleaning not only enhances your deck’s appearance but also extends its lifespan by preventing buildup that can cause long-term damage.
What Should You Not Use on Trex Composite Decking?
To protect your Trex composite deck, avoid using harsh cleaning products and tools that can damage the surface. Here are some things you should never use:
Bleach or Acid-Based Cleaners – These can lighten or discolor the deck’s surface, reducing its aesthetic appeal.
Harsh Chemicals or Solvents (e.g., Acetone) – These can cause permanent damage to the composite material, weakening its structural integrity.
Sanding – Sanding will alter the surface texture and remove the protective outer layer, making the deck more susceptible to staining and weathering.
High-Pressure Power Washing – If not done correctly, excessive force can scar the boards. Stick to manufacturer guidelines for safe pressure washing.
How Do I Make My Trex Composite Deck Look New Again?
If your Trex composite deck is looking faded or dull, there are a few steps you can take to restore its vibrant appearance:
Regular Cleaning – The first step is to remove dirt and grime using a mild soap and water solution.
Stain Removal – Address stains immediately using a deck-safe cleaner to prevent long-term discoloration.
Deck Brighteners – A deck brightener can help restore color and remove tannin stains that result from leaves and organic material.
Avoid Excessive Sun Exposure – If your deck is in direct sunlight, consider using an outdoor rug or furniture to reduce UV exposure, which can fade composite decking over time.
How to Pressure Wash a Composite Deck Without Damaging It?
If you choose to pressure wash your Trex composite deck, follow these guidelines to avoid damage:
Use the Right Pressure Setting – Up to 3100 PSI is acceptable, but it’s best to start lower and increase only if needed.
Use a Fan Tip Nozzle – A 40-60 degree spread helps distribute the water evenly and prevents focused pressure from causing damage.
Maintain Proper Distance – Keep the nozzle 8-12 inches away from the surface to avoid etching or gouging.
Spray at a 45-Degree Angle – This reduces direct impact while ensuring even cleaning.
Work in Sections – Divide the deck into smaller areas and clean each section thoroughly before moving on.
How to Clean Dirt & Debris
Keeping your deck free from dirt and debris is crucial to maintaining its longevity. Accumulated debris can trap moisture, leading to mold and mildew growth. Regularly removing debris prevents buildup and helps your deck retain its original beauty.
Sweeping – Use a broom or a leaf blower to remove leaves, twigs, and dust.
Hosing Down – A quick rinse with a garden hose can wash away light dirt and pollen.
Spot Cleaning – For sticky residues or bird droppings, use a soft-bristle brush with warm, soapy water.
What About Grime Buildup?
Over time, dirt and grime can settle into the grooves of the composite boards. To tackle this:
Mix a mild dish soap in a bucket of water and scrub the grime using a soft brush.
Clean in small sections to ensure thorough rinsing.
Avoid letting soapy water dry on the surface, as it can leave behind a film.
Spills, Stains, and Mold
Oil, Grease & Food
Greasy food spills can stain the deck if not cleaned promptly. To remove them:
Wipe up spills immediately.
Scrub with warm soapy water and a brush.
Rinse thoroughly to prevent residue from settling.
Mold & Mildew
Mold thrives in damp, shaded areas.
Scrub affected areas with warm, soapy water.
Avoid using harsh chemicals that could damage the composite material.
Hard Water Stains
Hard water leaves mineral deposits that cause stains.
Clean with white vinegar and rinse thoroughly.
Avoid rinsing with hard water to prevent recurrence.
Snow & Ice
Use a plastic shovel to remove snow (never metal).
Avoid using rock salt or calcium chloride, as they can corrode deck fasteners.
Cleaning Without A Power Washer
If you prefer a gentler approach:
Remove furniture and sweep off debris.
Scrub with a mixture of warm water and dish soap using a soft-bristle brush.
Rinse with a garden hose and let dry completely before replacing furniture.
Conclusion
Caring for your Trex composite deck is easy when you follow the right steps. With regular cleaning, proper stain removal techniques, and careful power washing, your deck can remain in great condition for years. Avoid harsh chemicals and excessive pressure washing to protect your investment. If you think your deck needs more than a simple cleaning then get in contact with ProDeck Construction and you can contact us today for expert help!