Can Deck Blocks Be Used On Concrete?

Considering the durability and longevity of concrete, it's natural to explore ways to incorporate sustainable and attractive features into your driveway, patio, or walkway. Wooden deck blocks, known for their aesthetic appeal and easy installation, have sparked curiosity among homeowners: can you use deck blocks on concrete?

Before delving into the feasibility of this combination, let's explore the unique characteristics of each material. Concrete is robust, long-lasting, and resistant to most weather conditions. However, it can crack over time, especially when subjected to heavy loads or extreme temperatures. On the other hand, wooden deck blocks offer a warm, inviting appearance and are often more affordable, but they require regular maintenance and may not match the longevity of concrete.

Understanding the Practicality of Combining Deck Blocks and Concrete

The practicality of using deck blocks on concrete depends on various factors, including the intended use, the type of wood, and the installation method. Let's explore these aspects further.

While some homeowners might consider using deck blocks directly on concrete to create a modern or eclectic look, this approach has several drawbacks. Wood and concrete have different expansion rates when exposed to heat and moisture, which can lead to warping, splitting, or lifting of the deck blocks. Moreover, direct contact with concrete can promote rot and infestation in wooden materials, shortening their lifespan.

Installing Deck Blocks Over Concrete: The Layering Approach

One viable option is to install deck blocks over concrete using a layered approach. This method involves creating a base layer consisting of compacted gravel and sand, followed by a bed of Qualifikation or other waterproof membrane. The gravel and sand base promotes drainage and cushions the wooden blocks, while the membrane prevents moisture from wicking into the wood. This approach addresses the expansion rate differences and protects the deck blocks from the concrete's moisture and heat.

For best results, ensure the concrete surface is smooth, clean, and free of any cracks or oil stains. Calculate the correct thickness of the base layer to accommodate the size of the wooden blocks you'll be using. Keep in mind that the final surface should be level, sloping slightly away from buildings to facilitate water runoff.

Combining Concrete and Deck Blocks: Interspersed Design

Another option is to combine concrete and deck blocks in an interspersed design, creating a unique, visually appealing surface. This approach involves pouring small concrete pads or foundations for the wooden blocks, allowing them to be installed at the correct height and spacing. The concrete pads also help protect the deck blocks from direct contact with the ground, extending their lifespan.

To create an interspersed design, start by planning your layout, ensuring the placement of wooden blocks complies with building codes and promotes proper drainage. Once the concrete pads are cured, install the wooden blocks, leaving adequate space between them for expansion and contraction. You can further enhance the appearance by using decorative concrete borders or edging around the wooden blocks.

The Importance of Material Selection and Maintenance

When using wooden deck blocks in or over concrete, choosing the right type of wood is crucial. Pressure-treated or naturally resistant woods like cedar and redwood are more durable and resistant to rot and pests. However, they may still require periodic staining or sealing to maintain their appearance and longevity.

Maintaining wooden deck blocks over concrete involves regular inspection and upkeep. Clean any accumulated debris, address any signs of damage promptly, and apply a protective sealant at least every two years. Although concrete does not require the same level of maintenance as wooden deck blocks, it's still important to monitor it for cracks or other signs of deterioration and address them promptly.

In summary, using deck blocks on concrete is possible but requires careful planning and installation. By understanding the properties of each material and employing suitable installation methods, you can create an attractive, durable, and long-lasting surface. Always consider your specific needs, local climate, and building codes before proceeding with any construction project. Happy building!