The Pitfalls of Placing Composite Decking Directly on Ground or Concrete Patios

Composite decking has revolutionized the outdoor living space, offering a low-maintenance alternative to traditional wood decks. Its durability, resistance to rot, and aesthetic appeal make it a popular choice for homeowners looking to enhance their outdoor spaces. However, despite its versatility, laying composite decking directly on the ground or concrete patios might seem like a convenient shortcut, but it comes with its own set of pitfalls and drawbacks.

  1. Moisture and Drainage Issues: One of the primary concerns when installing composite decking directly on the ground or concrete is moisture retention. Ground moisture can seep into the boards, leading to mold, mildew, and rot over time. Concrete patios, while seemingly solid, can also trap moisture, especially if not properly sealed. Without adequate airflow beneath the decking, moisture becomes trapped, creating an environment conducive to rot and decay.
  2. Uneven Surface and Stability: Ground surfaces are rarely perfectly level, and concrete patios may have slight imperfections. Placing composite decking directly on such surfaces can result in an uneven deck, compromising its structural integrity and stability. Over time, this unevenness can lead to sagging, warping, and even structural failure, posing safety hazards for anyone using the deck.
  3. Limited Air Circulation: Composite decking needs proper air circulation to prevent moisture buildup and promote drying. When laid directly on the ground or concrete, airflow beneath the boards is restricted, inhibiting evaporation and exacerbating moisture-related issues. Proper ventilation is essential for maintaining the longevity and performance of composite decking.
  4. Increased Risk of Pest Infestation: Ground-level decking is more susceptible to pest infestation compared to elevated decks. Insects, rodents, and other pests can easily access and nest beneath the decking, causing damage and creating unsanitary conditions. Elevating the decking above ground level reduces the risk of pest infestation and facilitates inspection and maintenance.
  5. Voided Warranty and Reduced Lifespan: Most composite decking manufacturers explicitly state in their installation guidelines that decking should not be installed directly on the ground or concrete. Failure to adhere to these guidelines can void the warranty, leaving homeowners liable for any damage or defects. Moreover, decking installed in such manner is likely to have a significantly shorter lifespan compared to properly installed decking.

While it may be tempting to take shortcuts when installing composite decking, placing it directly on the ground or concrete patios is a decision filled with risks and consequences. To ensure the longevity, stability, and performance of your composite deck, it’s essential to follow manufacturer guidelines and best practices for installation. Investing time and effort into proper installation methods will pay off in the long run, providing you with a beautiful and durable outdoor living space for years to come.


About Outback Deck, Inc.

Outback Deck, Inc. brings inspiration to outdoor living spaces. We believe if you have an outdoor space, you should WANT to spend time in it.  Our commitment to providing the best customer experience and creating outstanding value in your new deck or porch is unmatched in the industry.  For more information, please visit  life happens out back

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