If you’re a homeowner with a Trex decking, you already know the beauty and low-maintenance appeal it brings to your outdoor space. But even though Trex decking is designed to be durable and easy to care for, it still needs a little attention to keep it looking its best.
Especially if you live in an area where pollen, leaves, humidity, or even salt air are part of your daily life, your Trex deck might be showing signs of buildup, like grime, mildew, or even surface stains. Don’t worry, though. Cleaning it properly doesn’t require a ton of effort or specialty tools. You just need the right steps and a bit of time.
In this guide, we’re going to walk you through everything you need to know about cleaning your Trex deck the right way. Whether you’re dealing with a full season of dirt or just want to freshen it up before company comes over, you’ll be covered.
Why Trex Decks Still Need Cleaning
Trex decking is a composite material made from a mix of wood fibers and recycled plastic. It’s resistant to rot, warping, and termites, which is a huge plus compared to traditional wood. But here’s the deal: even though it’s “low maintenance,” that doesn’t mean “no maintenance.”
Trex decks can accumulate dirt, pollen, mold, mildew, and even grease from grills or outdoor cooking. This can make your deck look dingy, feel slippery, and even damage the surface over time.
Especially in areas with high humidity or where it rains often, mold and mildew can settle in quickly. And if you’re near the coast or live in a wooded area, debris and salt can take a toll too. That’s why regular cleaning is so important.
Supplies You’ll Need
Before you get started, gather these supplies:
- A bucket
- Garden hose with spray nozzle
- Soft-bristle brush (avoid anything too stiff)
- Mild soap (like dish detergent)
- White vinegar (for mold/mildew)
- Baking soda (for stains)
- Trex -approved composite deck cleaner (optional, but effective)
Avoid: Pressure washers over 3100 psi, metal brushes, or harsh chemicals like bleach. They can damage the surface or void your warranty.
Step-by-Step Guide to Cleaning a Trex Deck
1. Clear the Deck
First things first, remove everything from the deck. Furniture, rugs, planters, grills, and anything else needs to be out of the way. This lets you clean every inch without obstruction and prevents damage to your belongings.
2. Sweep Off Debris
Using a broom or leaf blower, sweep off all leaves, dirt, and loose debris. This prevents you from grinding dirt into the surface while scrubbing.
3. Rinse with Water
Use a garden hose with a spray nozzle to rinse the entire surface of your deck. This loosens stuck-on dirt and gets rid of surface dust.
4. Prepare a Cleaning Solution
Mix warm water with a mild dish soap in a bucket. If you’re tackling mildew or mold, add a splash of white vinegar to the mix. Avoid using harsh detergents.
5. Scrub Gently
Dip your soft-bristle brush into the soapy solution and scrub the deck boards in the direction of the grain. Work in sections, about 3–4 feet at a time.
For stubborn spots, sprinkle a bit of baking soda on the stain before scrubbing.
6. Rinse Thoroughly
Once you’ve scrubbed a section, rinse it immediately. Don’t let soap or dirty water dry on the surface. It can leave residue or streaks.
7. Let It Dry
Allow the deck to air dry completely before placing furniture back. Depending on the weather, this can take a few hours.
How Often Should You Clean Your Trex Decking?
You don’t need to scrub it every weekend, but a good general rule is:
- Light cleaning: Once every 1-2 months
- Deep cleaning: At least twice a year, ideally in spring and fall
- Spot cleaning: As needed for spills, stains, or buildup
This schedule helps prevent long-term staining and keeps your deck safe and looking great year-round.
Tips for Different Types of Stains
- Grease/Oil: Use a composite deck cleaner specifically labeled for grease. Act fast, fresh stains are easier to remove.
- Mold/Mildew: Vinegar and water solution works well. For heavy mildew, use a specialized cleaner.
- Rust: A paste of baking soda and water, left on the stain for 15-20 minutes before scrubbing, can help.
- Food/Drink: Mild soap and water usually do the trick.
Preventive Maintenance Tips
- Use mats under grills and planters to prevent grease or water buildup.
- Trim nearby trees to reduce leaf litter and pollen.
- Avoid rubber or vinyl-backed mats. They can trap moisture and leave marks.
- Hose off your deck regularly during pollen season or after storms.
Choose MCM Outdoor Living to Build Your Trex Decking
We Know How to Care for It, Because We Build It
At MCM Outdoor Living, we’ve worked with Trex decking long enough to know what keeps it performing, and what shortens its life. We understand the materials inside and out, which is why so many homeowners turn to us for guidance on how to properly care for their deck and avoid costly mistakes.
If you’re planning to build a Trex deck, or upgrade from an older wood one, we’re here to help you do it right from the start. Reach out to MCM Outdoor Living and let’s talk about a deck that’s built to last and easy to maintain. Give us a call at (469) 583-6213.
Frequently Asked Questions
Can I pressure wash my Trex deck?
Yes, but be careful. Use a fan tip and keep the pressure under 3100 psi. Keep the nozzle at least 8 inches away from the surface to avoid damage.
How do I prevent mold and mildew from coming back?
Rinse your deck regularly, especially after rain. Keep it clear of leaves and debris, and ensure good air flow around the deck.
Can I use bleach on my Trex deck?
No. Bleach can fade or damage the surface. Use vinegar or a composite deck cleaner instead.
What’s the best cleaner for Trex decks?
Mild dish soap and warm water work well for most cases. For deep cleaning, use a Trex-approved composite deck cleaner.
Is it okay to use a hard-bristle brush?
Avoid hard or wire brushes. They can scratch the surface. Stick with soft-bristle brushes only.
What if my deck has mold stains that won’t come off?
Try a specialized mold cleaner designed for composite decking. If that doesn’t work, call us for professional help.
Can I use a leaf blower to clean off my Trex deck?
Absolutely. Leaf blowers are great for removing surface debris like leaves and dust.
How long does it take for a cleaned deck to dry?
Usually 2–6 hours depending on temperature, sun exposure, and humidity.
Final Thoughts: A Clean Deck = A Happy Home
Keeping your Trex deck clean doesn’t have to be a chore. With the right steps, a little care, and a commitment to doing things the right way, your deck can stay beautiful and safe for years to come.
And if you ever want to save time or get the job done professionally, MCM Outdoor Living is here to help. We know decks, and we know what works.
Contact us at (469) 583-6213 and let’s take care of your outdoor living space the way it deserves.