Seasonal Deck Maintainance: Cleaning Tips for Every Time of the Year

May 2, 2024


Composite deckings have emerged as a trendy alternative to traditional decks that combine the aesthetic appeal of wooden decks and the durability and strength of synthetic materials. While composite decking offers a more relaxed option for outdoor settings, it still needs regular maintenance to look pristine and sharp.

Maintaining a composite deck is not just a one-time task; it's an ongoing commitment that evolves with the changing seasons. As the weather shifts, so do your deck’s challenges, from battling pollen in the spring to warding off snow and ice in the winter. Let’s explore tips for cleaning composite decking each season.

Spring Cleaning

Springtime sees the release of copious amounts of pollen, which coats outdoor surfaces, including composite decks, in a yellowish layer. Sweep your deck surface with a soft-bristled broom, or use a leaf blower to dislodge pollen and debris. Use a garden hose to gently rinse away surface grime.

As temperatures rise and moisture levels increase, composite decks become prime breeding grounds for mold and mildew. If left unchecked, mold can increase, causing unsightly stains and compromising the deck’s structural integrity. Use a specialized cleaner formulated for composite materials to tackle mold and mildew growth.

Adequate ventilation is crucial for preventing mold growth on composite decks. Trim back overhanging branches and foliage to allow sunlight and air to reach the deck surface. Additionally, consider installing a deck ventilation system to promote air circulation beneath the deck boards.

Summer Maintenance

Cleaning composite decking comes with its own set of challenges during the summer. Increased foot traffic, exposure to harsh UV rays, and inevitable spills from food and beverages can affect your deck’s appearance and durability.

Exposure to excessive sunlight can cause fading, discoloration, and deterioration of the deck material over time. UV rays can break down the outer protective layer of the composite, making it more susceptible to damage. Consider applying a UV protectant sealant or stain to safeguard your deck from UV damage. These products provide additional protection from fading and discoloration caused by sunlight.

Food and beverage stains can attract pests and promote mold growth if not addressed promptly. You can use a mild detergent and water to spot clean minor stains. Consider using a specialized composite deck cleaner or a DIY solution such as vinegar and water for tougher stains.

Fall Prep

As the vibrant colors of autumn leaves begin to paint the landscape, shift your focus to preparing the composite decks for the colder months ahead. Fallen leaves can leave behind stains and accumulate in the deck’s crevices, promoting moisture retention and mold growth. Combat leaf stains by sweeping or gently power washing the deck surface regularly. Use a rake and a leaf blower to remove leaves between deck boards and tight spaces.

Before the arrival of winter:

  • Make sure you inspect your boards for damage.
  • Replace damaged boards, tighten loose fasteners, and apply epoxy or wood fillers to fill in cracks or holes.
  • Ensure that any repairs are made with compatible materials to maintain the deck’s integrity.

Consider applying a protective sealant to your deck to shield it from the elements as temperatures drop. A high-quality sealant can help repel moisture, prevent UV damage, and enhance the deck’s natural beauty.

Winter Cleaning

Winter poses unique challenges for composite decks, requiring proactive maintenance to shield them from snow, ice, and freezing temperatures. Promptly remove snow from your deck, as excessive weight can cause stress and potential structural damage. Avoid harsh chemicals on the compost deck, and use plastic shovels and warm water to remove residual snow.

Regularly sweep or blow debris off the deck to maintain cleanliness and airflow. Opt for salt alternatives like calcium chloride or potassium chloride to melt ice without damaging the deck material. Follow manufacturer instructions and apply sparingly to minimize the risk of damage.


Neglecting seasonal maintenance can result in unsightly stains, mold growth, and structural damage over time. By addressing each season’s specific challenges and implementing the composite deck cleaning strategies mentioned above, you can ensure your deck is maintained in pristine condition all year round.


Urban Splatter

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