how to clean mold off trex decking

Daniel Parker

3 min read

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24-01-2025

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Mold on your Trex deck? Don't worry, it's a common problem easily tackled with the right approach. This guide will walk you through how to effectively clean mold and mildew from your Trex composite decking, restoring its beauty and extending its lifespan. We'll cover everything from preventative measures to the best cleaning solutions and techniques. Getting rid of mold on your Trex deck doesn't have to be a daunting task!

Understanding Mold and Mildew on Trex

Trex decking, while durable, is still susceptible to mold and mildew growth, especially in humid climates. These fungi thrive in damp environments, feeding on organic matter that may accumulate on the decking surface. Regular cleaning is key to preventing significant mold buildup. Early detection and treatment is also crucial to avoid extensive damage.

Preventative Measures: Keeping Mold Away

The best way to deal with mold is to prevent it from appearing in the first place! Here’s how:

• Regular Cleaning: A quick sweep or rinse after each rain or heavy dew will remove debris and prevent mold spores from settling.
• Proper Ventilation: Ensure good air circulation around your deck. This helps prevent moisture buildup, a key factor in mold growth. Consider adding fans or strategically placing plants to promote air flow.
• Avoid Overwatering: Be mindful of watering plants near your deck. Excessive moisture can lead to mold.
• Annual Deep Clean: Plan an annual deep clean to address any lingering mold or mildew before it becomes a major problem.

Cleaning Supplies You’ll Need

Before you begin, gather these essential supplies:

• Soft-bristled brush: A stiff brush can scratch your Trex decking, so choose a gentle one.
• Bucket: For mixing your cleaning solution.
• Garden hose with spray nozzle: For rinsing the deck.
• Cleaning solution: We'll explore safe and effective options below.
• Safety glasses and gloves: Always protect yourself when cleaning.

Choosing the Right Cleaning Solution for Trex

Trex recommends using a solution of mild dish soap and water for routine cleaning. For heavier mold and mildew, consider these options:

• Oxygen Bleach: This is a popular and environmentally friendly choice, effective against mold and mildew without harsh chemicals. Always follow the product instructions.
• Trex’s Own Cleaner: Trex offers its own specialized cleaning products designed for their decking material. Check their website or local retailers for availability.
• Commercial Deck Cleaners: Many commercial deck cleaners are suitable for Trex. However, always check the product label to ensure it's compatible with composite decking. Never use chlorine bleach, as it can damage the Trex material.

How to Clean Mold Off Trex Decking: A Step-by-Step Guide

1. Prepare the Area: Clear away any furniture, plants, or debris from the deck.
2. Pre-Rinse: Use a garden hose to thoroughly rinse the deck, removing loose dirt and debris.
3. Mix Cleaning Solution: Follow the instructions on your chosen cleaning product. Generally, a solution of mild dish soap and water, or oxygen bleach diluted according to package directions, works well.
4. Apply and Scrub: Apply the cleaning solution to the affected areas using a soft-bristled brush. Scrub gently but thoroughly, paying attention to moldy spots.
5. Rinse Thoroughly: Rinse the deck completely with the garden hose, ensuring all cleaning solution is removed.
6. Allow to Dry: Let the deck air dry completely before replacing furniture or using the space.

Addressing Stubborn Mold

If mold is persistent, you may need a stronger approach:

• Repeat the Process: Repeat steps 3-5, allowing the cleaning solution to dwell on the mold for a longer period (following product instructions).
• Pressure Washer (Low Pressure): A pressure washer can be effective, but use it cautiously with a low-pressure setting to avoid damaging the Trex. Always test in an inconspicuous area first.

Maintaining Your Clean Trex Deck

After cleaning, regular maintenance will help keep mold at bay. Continue with regular sweeping, rinsing, and annual deep cleaning as outlined in the preventative measures section.

Conclusion

Cleaning mold off your Trex deck is achievable with the right tools and techniques. By following these steps and practicing preventative measures, you can maintain the beauty and longevity of your Trex decking for years to come. Remember to always prioritize safety and choose cleaning solutions compatible with your decking material. Preventing mold is always easier than removing it!