Choosing a Trex deck means investing in a beautiful, durable outdoor space that enhances your home. To keep it looking its best, regular cleaning is essential. Whether your deck sees daily use or just the occasional gathering, routine maintenance keeps it looking fresh, free of dirt, debris, and any unwanted growth that can thrive in shady or damp areas. With just a few simple steps, you can ensure your Trex decking remains stunning all year round.
Why Regular Deck Cleaning Matters
Your Trex deck is built for durability, but like any outdoor space, it faces constant exposure to the elements—and grime has a way of creeping up on you. Over time, dirt and debris settle in, dulling that rich color you loved when you first installed the deck. Those weekend cookouts? They bring great memories… and grease spatters, beverage spills, and dropped plates that can leave behind stubborn stains.
If your deck offers a shady retreat from the summer sun—may be beneath the canopy of a favorite tree—that cool, inviting spot also creates the perfect conditions for moisture to linger. Unfortunately, that means mold and mildew can take hold, eating away at your deck’s protective coating over time. In the shorter term, this growth can make your deck surface slippery and dangerous. Plus, those same trees that provide welcome shade also shed leaves, twigs, and pollen, which settle into your decking. As this organic debris breaks down, it creates an acidic residue that can gradually degrade the boards.
And if grime builds up long enough, it can even attract ants, termites, and other unwanted pests—turning your peaceful retreat into a haven for more than just relaxation.
Fortunately, a little routine care is all it takes to keep your deck looking its best. Follow these simple cleaning steps to help keep your Trex deck as attractive as the day it was installed— without grime, stains, or mildew taking away from its beauty or enjoying your favorite outdoor retreat.
What You’ll Need
Cleaning your Trex deck requires just a few basic tools and supplies, and chances are you already have them on hand:
- Household broom – To sweep away loose dirt and debris (or use a leaf blower for quicker cleanup with less effort)
- Soft-bristled scrub brush – For removing grime without damaging the deck surface (or opt for a long-handled deck brush to make scrubbing easier on your back and knees)
- Garden hose – For rinsing off the deck
- Bucket – To mix the cleaning solution
- Mild soap and water – A simple, effective cleaning solution (or use a composite deck cleaner)
- Putty knife or screwdriver – For clearing debris between deck boards
- Plastic tarp – To protect plants and landscaping while cleaning
Step-by-Step Guide to Cleaning Your Trex Deck
Cleaning your Trex deck is a straightforward process that requires just a few simple steps. Whether you’re dealing with everyday dirt or tougher stains, following this method will help keep your deck looking its best.
Watch: How to Clean Trex Decking
Let’s get started!
- Clear the Deck
Start by removing furniture, planters, rugs, and any other items from the deck surface. This allows for a thorough cleaning without missing any spots.
- Clean Between the Boards
Over time, small debris like leaves and twigs can get lodged between deck boards. Use a putty knife or a screwdriver to carefully clear out the gaps. This helps improve drainage and prevents organic material from trapping moisture.
- Sweep Away Loose Debris
Use a broom to sweep dirt, leaves, and other debris off the deck surface or use a leaf blower. Pay special attention to corners and areas near railings where dirt tends to collect.
- Wet the Deck
Using a garden hose, rinse off the deck to remove any remaining dust or loose particles. This step will also help spread your cleaning solution evenly, improving its effectiveness.
- Apply the Deck Cleaner
Trex recommends using warm, soapy water and a soft-bristle brush for cleaning. You can also opt for a composite deck cleaner, especially if you’re tackling tougher stains or stubborn grime—just follow the manufacturer’s instructions.
For the following stains, try these extra steps:
- For grease or oil stains: Blot any excess grease or oil with a paper towel or clean cloth immediately. Clean as soon as possible with warm, soapy water.
- For pine sap removal: For fresh sap, scrub with warm, soapy water or a composite deck cleaner using a soft brush or sponge, then rinse thoroughly. For older sap, let your solution sit longer. Add ice for 15-20 minutes for slightly hardened sap to make it brittle, then gently scrape with a plastic razor blade or putty knife. For more removal methods, read How to Remove Pine Sap from Composite Decking.
- For hard water stains: Break down mineral buildup with a diluted vinegar solution (1 cup vinegar to 1 gallon of water). Always test in an inconspicuous area first to ensure it doesn’t affect the deck’s color or finish.
- Scrub Gently
Using a soft-bristle brush, scrub the deck surface in the direction of the grain. Start from the house and work outward, moving from railings and posts down to the decking. This prevents dirty runoff from soiling areas you’ve already cleaned.
Avoid using wire brushes or abrasive pads, as they can scratch the deck surface.
- Rinse Thoroughly
Once you’ve scrubbed the entire deck, use a garden hose to rinse off all soap and cleaner residue, again working from high to low. Be thorough—any remaining soap can leave a film or attract dirt.
- Inspect and Touch Up
Take a look around the deck to make sure all stains and dirt are gone. If you spot any stubborn areas, try a stronger solution or let the cleaner sit longer before scrubbing and rinsing again.
- Let It Dry
Allow the deck to dry completely before replacing your deck items to prevent moisture from getting trapped under rugs, furniture bases, planters, or grills.
For more deck cleaning tips, check out How to Clean Your Deck the Right Way.
Additional Tips for Trex Deck Maintenance
Regular cleaning goes a long way in keeping your Trex deck looking great, but a few extra maintenance habits can help extend its lifespan and keep it in top shape year-round. Here are some simple ways to protect your deck from everyday wear and tear:
- Prevent future stains: Clean up food, beverage, and grease spills as soon as they happen for easier cleanup and stain prevention.
- Use grill mats: Place a mat under your grill to catch grease and food drips.
- Choose the right rugs: Opt for outdoor rugs that allow airflow beneath them to prevent trapped moisture.
- Trim back vegetation: Prune any trees or bushes that extend too far over your deck to minimize fallen leaves, pollen, and sap buildup.
- Prevent insect infestations: Keep your deck free of food crumbs and standing water to deter ants and other pests.
- Protect from moisture: Sweep away standing water after rain to reduce the risk of mold and mildew. Remove snow accumulation with a plastic shovel, working in the direction of the deck boards.
To protect your deck’s substructure from moisture damage, apply Trex Protect flashing tape to your joists when building your Trex deck. For added protection and a dry bonus space, choose Trex RainEscape under-deck drainage to divert water away and create a clean, usable area below your deck.
Enjoy Your Freshly Cleaned Trex Deck
Regular cleaning preserves your deck’s beauty and ensures you get the most out of your outdoor space for years to come. With just a bit of upkeep, you can keep your Trex deck clean, welcoming, and ready for whatever comes next—whether it’s quiet morning coffee or lively gatherings with friends. Enjoy!
