Remove furniture and plants from the Trex composite deck.
Wipe loose mold from the deck with old rags. Place the rags in a plastic trash bag. Put the trash bag into an outside trash receptacle.
Sweep the deck free of debris and dirt with a broom.
Mix 3/4 cup of bleach into a gallon bucket of water. Dip a sponge into the bleach solution and apply to the mold on the deck. Saturate the mold with the bleach. Allow the bleach to remain on the mold for five minutes, giving it time to kill the fungus.
Scrub the mold with a scrub brush. Rinse the mold and the bleach from the deck with the garden hose or buckets of water. Ensure the bleach is completely rinsed from the deck. Allow the deck to dry before replacing the furniture.
Things You Will Need
- Trash bag
- Trash receptacle
- Scrub brush
- Cover grass or other vegetation near the deck when using the bleach solution.