Concrete Deck Blocks: A Comprehensive Guide to Installation, Maintenance, and Design

Concrete deck blocks offer a versatile and cost-effective solution for creating ground-level decks, patios, walkways, and even sheds. Unlike traditional decks that require complex framing and significant labor, concrete deck blocks provide a simpler, faster, and often more affordable alternative. This guide will explore everything you need to know about concrete deck blocks, from installation and maintenance to design ideas and considerations.

What are Concrete Deck Blocks?

Concrete deck blocks are pre-cast concrete units, typically square or rectangular, designed to support deck structures. They are generally used for low-to-the-ground decks, eliminating the need for extensive excavation and foundation work. These blocks provide a stable and level base for your deck surface, whether you choose to use wood, composite decking, or even pavers.

Benefits of Using Concrete Deck Blocks

• Cost-Effective: Concrete deck blocks are generally less expensive than traditional deck foundations. The reduced labor requirements also contribute to overall cost savings.
• Easy Installation: Setting up a deck with concrete deck blocks is a relatively straightforward process, often requiring only basic tools and minimal construction experience.
• Versatile: Concrete deck blocks can be used for various outdoor projects, including decks, patios, walkways, sheds, and even temporary structures.
• Durable: Made from concrete, these blocks are resistant to rot, insects, and weather damage, ensuring a long lifespan for your deck.
• Low Maintenance: Once installed, concrete deck blocks require minimal maintenance, making them a hassle-free option for homeowners.
• Environmentally Friendly: Using concrete deck blocks can reduce the amount of lumber needed for a deck, contributing to sustainable building practices.

Types of Concrete Deck Blocks

While the basic function remains the same, concrete deck blocks come in various shapes, sizes, and designs. Here’s a breakdown of some common types:

• Standard Deck Blocks: These are typically square or rectangular blocks with a flat top surface for supporting deck boards or joists.
• Pier Blocks: Pier blocks often have a recessed top designed to accommodate posts, providing a secure connection for taller decks or structures.
• Adjustable Deck Blocks: These blocks feature adjustable components that allow for leveling the deck surface, even on uneven ground.
• Decorative Deck Blocks: Some concrete deck blocks come with decorative patterns or textures, adding visual appeal to your deck.

Planning Your Deck with Concrete Deck Blocks

Before you start building, careful planning is essential. Here’s what to consider:

Determine the Size and Layout

Measure the area where you plan to build your deck and sketch out the desired layout. Consider the intended use of the deck and how much space you’ll need. Factor in any existing structures, such as trees or fences, that might affect the design.

Calculate the Number of Blocks Needed

Determine the spacing between your deck supports (joists). This will depend on the type of decking material you choose and the load-bearing capacity of the joists. Divide the total area of your deck by the area covered by each block to estimate the number of concrete deck blocks required. It’s always a good idea to order a few extra blocks to account for cuts or breakage.

Prepare the Site

Clear the area of any vegetation, debris, and topsoil. Level the ground as much as possible. Consider using a layer of gravel or crushed stone to improve drainage and prevent settling. Compacting the soil is also crucial to ensure a stable base for your concrete deck blocks.

Choose Your Decking Material

Select the decking material that best suits your needs and budget. Wood is a classic choice, offering natural beauty and warmth. Composite decking is a low-maintenance alternative that resists rot and fading. Pavers can also be used to create a unique and durable deck surface. [See also: Composite Decking vs. Wood: A Comprehensive Comparison]

Installing Concrete Deck Blocks: Step-by-Step Guide

Here’s a general overview of the installation process. Always refer to the manufacturer’s instructions for specific recommendations.

Step 1: Mark the Block Locations

Use stakes and string to mark the locations where you’ll place the concrete deck blocks. Ensure that the blocks are evenly spaced and aligned according to your planned layout.

Step 2: Level Each Block

Dig a shallow hole at each block location and place the block in the hole. Use a level to ensure that the block is perfectly level. Add or remove soil as needed to achieve a level surface. For adjustable concrete deck blocks, follow the manufacturer’s instructions to adjust the height.

Step 3: Install the Deck Frame

Once all the blocks are in place and level, install the deck frame on top of the blocks. Secure the frame to the blocks using appropriate fasteners, such as screws or construction adhesive. Ensure that the frame is square and properly supported.

Step 4: Install the Decking Material

Attach the decking material to the frame using screws or nails. Follow the manufacturer’s instructions for spacing and fastening. Be sure to leave adequate gaps between the boards for expansion and contraction.

Maintaining Your Concrete Deck Block Deck

Concrete deck blocks require minimal maintenance, but regular inspections can help prolong the life of your deck.

• Inspect for Cracks: Check the blocks for any cracks or damage. Repair any cracks promptly to prevent further deterioration.
• Clean Regularly: Remove dirt, debris, and algae from the blocks using a brush and mild detergent.
• Re-Level if Necessary: Over time, the blocks may settle, causing the deck to become uneven. Re-level the blocks as needed to maintain a level surface. Adjustable concrete deck blocks make this process easier.
• Protect from Moisture: While concrete is durable, excessive moisture can lead to spalling (surface flaking). Consider applying a concrete sealer to protect the blocks from water damage.

Design Ideas for Concrete Deck Block Decks

Concrete deck blocks offer a blank canvas for creating a variety of deck designs. Here are a few ideas to inspire you:

• Simple Ground-Level Deck: Create a basic rectangular deck for outdoor seating and dining.
• Multi-Level Deck: Use concrete deck blocks to create a multi-level deck with different areas for lounging, cooking, and entertaining.
• Patio Extension: Extend your existing patio with a deck built on concrete deck blocks.
• Walkway: Use concrete deck blocks to create a walkway through your garden or to connect different areas of your yard.
• Shed Foundation: Provide a stable and level foundation for your shed using concrete deck blocks.

Troubleshooting Common Problems

Here are some common problems you might encounter and how to address them:

• Uneven Deck: This is usually caused by settling of the concrete deck blocks. Re-level the blocks as needed.
• Wobbly Deck: Ensure that the deck frame is properly secured to the blocks. Add additional support if necessary.
• Cracked Blocks: Replace any cracked or damaged blocks to maintain the structural integrity of the deck.
• Water Pooling: Improve drainage by adding gravel or crushed stone around the blocks. Consider applying a concrete sealer to protect the blocks from water damage.

Cost Considerations

The cost of building a deck with concrete deck blocks will vary depending on the size of the deck, the type of blocks used, and the decking material chosen. However, it’s generally less expensive than building a traditional deck with a concrete foundation. Here’s a breakdown of potential costs:

• Concrete Deck Blocks: $5 – $20 per block
• Decking Material: $2 – $15 per square foot (depending on the material)
• Framing Lumber: $1 – $3 per linear foot
• Fasteners: $20 – $50
• Tools: Variable (depending on what tools you already own)

Labor costs will also vary depending on whether you hire a contractor or do the work yourself.

Are Concrete Deck Blocks Right for You?

Concrete deck blocks are a great option for homeowners who want a cost-effective, easy-to-install, and durable deck. However, they may not be suitable for all situations. Consider the following factors before making a decision:

• Ground Conditions: Concrete deck blocks are best suited for relatively level ground. If your yard is sloped or uneven, you may need to do some excavation and leveling before installing the blocks.
• Deck Height: Concrete deck blocks are typically used for low-to-the-ground decks. If you want a taller deck, you’ll need to use pier blocks or a traditional foundation.
• Building Codes: Check your local building codes to ensure that your deck complies with all regulations.

Conclusion

Concrete deck blocks provide a practical and affordable solution for creating outdoor living spaces. With proper planning and installation, you can build a beautiful and durable deck that will last for years to come. By understanding the benefits, types, installation process, and maintenance requirements of concrete deck blocks, you can make an informed decision and create the perfect outdoor oasis for your home.