How to Remove Mold & Mildew From Trex Decking

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Things You'll Need

  • Pressure washer

  • Vinegar

  • Baking soda

  • Coarse bristle brush

Remove Mold & Mildew From Trex Decking

Mold thrives where moisture and darkness combine. Mildew is the unfortunate bi-product of mold. This fungus adheres to surface and aside from looking esthetically displeasing. It can be harmful to your health as well. Trex Decks are optimal decks in that they don't splinter or rot, however nothing is sacred when it comes to mold. If you need to remove mold and mildew from your Trex Deck, it's a fairly simple process.


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Step 1

Use a pressure washer to remove as much of the mold as possible.

Step 2

Mix a solution of 2 parts of vinegar and 1 part of water in a bucket.

Step 3

Pour the solution on the mold and sprinkle baking soda all over the area.

Step 4

Allow the vinegar and baking soda to sit on the area for at least 20 minutes.

Step 5

Scrub the area with a medium to course bristle brush to remove any stains and residual mold and mildew.

Step 6

Rinse the area with clean water.


Avoid getting vinegar into nearby flower beds as it will raise the acidity of the soil. Laundry detergent is another alternative to baking soda and vinegar.


Melynda Sorrels

Melynda Sorrels spent 10 years in the military working in different capacities of the medical field, including dental assisting, health services administration, decontamination and urgent medical care. Awarded the National Guardsman’s Medal for Lifesaving efforts in 2002, Sorrels was also a nominee for a Red Cross Award and a certified EMT-B for four years.