How to Prevent Mold & Mildew on Patios and Decks

Mold and mildew love damp, shaded surfaces—and patios and decks are common places for growth to take hold. Left untreated, they can make your outdoor areas slippery, unattractive, and even shorten the lifespan of the materials.
The good news is that with the right care and a few preventative steps, you can keep mold and mildew under control all year long.
Mildew and mold feed on moisture and organic material like leaves, dirt, and wood fibers. Once they take hold, they can cause discoloration, foul smells, and even damage to wood or composite surfaces. Worse, mold can create a slippery surface that’s dangerous for anyone walking across it.
Once the excess oil is absorbed, use a heavy-duty degreaser or dish soap mixed with warm water. Apply it directly onto the stain and scrub using a stiff-bristle brush. Let it sit for about 15 minutes to break down the oil.
Sweep your patio or deck regularly to remove leaves, dirt, and debris that trap moisture. The less buildup, the less opportunity for mold to grow.
Standing water is a mold magnet. Make sure water drains properly off your deck or patio and away from your home. Consider adding drainage solutions or leveling trouble spots.
Overhanging trees and shrubs can block sunlight and increase moisture. Trim them back to improve airflow and reduce the amount of organic debris falling onto your surfaces.
Some sealers and wood treatments include mold-resistant additives. These create a protective barrier that slows down the growth of mildew and helps maintain your deck’s appearance.
Professional soft washing or pressure washing removes mold, mildew, and algae effectively—especially in hard-to-reach areas. Regular service helps prevent regrowth and keeps your space looking fresh.
With a little maintenance and the occasional professional cleaning from Victoria Spray Kleen, your patio or deck can stay mold-free, safe, and beautiful year-round. Don’t wait until it’s a problem—prevent it before it starts.