How to Build a Ground-Level Deck

At UglyDeck, we are all about supporting our local DIYers. If you’re hoping to build a ground-level deck, we fully support you. To do so, we’ve broken down our tips and tricks to help you get the job done. 

If you need DIY deck help along the way, we’re always here for you. 

How to Build a Ground-Level Deck

The good news is building a ground-level deck is relatively straightforward. To help you get started, here are our general guidelines: 

1. Planning and Preparation

• Check local building deck construction codes and regulations.
• Select a flat area with good drainage and easy access to your house. 
• Plan the dimensions and shape of your deck based on your needs, preferences, and available space, as well as ventilation considerations. More on this later. 

2. Gather Materials and Tools

• Purchase pressure-treated lumber for the frame and decking boards, concrete blocks or deck blocks, galvanized screws or nails, gravel or crushed stone, and any additional materials for railings or stairs.
• You’ll need a circular saw, drill/driver, level, tape measure, framing square, shovel, wheelbarrow, and safety equipment like gloves and goggles.

3. Prepare the Site

• Get rid of any vegetation, rocks, or debris.
• Dig a shallow trench where the deck will go. Make sure it’s level and compact the soil.
• Place deck or concrete blocks in the trench to support the deck frame. Add gravel or crushed stone beneath each block for drainage.

4. Build the Frame

• Use string or stakes to outline the perimeter of the deck. Again, make sure the layout is square and level.
• Cut pressure-treated lumber to size for the joists and assemble them according to your deck plan.
• Secure the joists to the concrete or deck blocks using appropriate fasteners.

5. Install Decking Boards

• Start laying the decking boards perpendicular to the joists, leaving a small gap between each board for drainage and expansion.
• Use screws or nails to attach the decking boards to the joists, ensuring they are evenly spaced and flush.

6. Add Finishing Touches

• You can attach railing posts to the deck frame and install railing sections according to local building codes.
• Apply a weather-resistant stain or sealant to protect the wood.

7. Final Checks

• Check again the deck is level in all directions. Look for any loose connections or protruding fasteners.
• Once everything is secure and finished, it’s time to enjoy your new outdoor space!

Important Tips:

• Wear appropriate safety gear and follow safety guidelines when using power tools.
• Ground-level decks are susceptible to moisture and insects, so it is crucial to use pressure-treated lumber for the frame and decking.
• Proper drainage is essential to prevent water damage and rot. Ensure there’s adequate airflow beneath the deck.
• Maintain your deck by inspecting it regularly for signs of wear or damage. If you notice anything, take care of it immediately. 

With these steps in hand, you can successfully build a ground-level deck. Feeling unsure about any aspect of the construction process? Call the experts at UglyDeck, and we will jump in to help.

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How to Level a Deck on Uneven Ground

As you can see, leveling is an important step in the process for both safety and aesthetics. Here’s a step-by-step guide on how to level a deck on uneven ground:

1. Assess the extent of the unevenness and identify the high and low points of the ground where the deck will be built.
2. Decide on the height at which you want the deck to be level. This may involve considering the slope of the ground and any obstacles that need to be cleared.
3. Set corner posts or concrete piers at the desired height for the deck. Use a post level to ensure each post is plumb (perfectly vertical).

4. Tie a string line between the corner posts to establish a reference line for the height of the deck.

5. For each post or pier, dig a footing hole below the frost line or the depth recommended for your region. Footings should be level and at the desired height.

6. Install beams and joists between the corner posts. Ensure they’re level along the string line and spaced adequately according to your deck design.
7. Use shims between the beams and the posts or footings to adjust for minor height variations if necessary.

8. Once the framework is level, install the decking boards perpendicular to the joists, ensuring they’re also level and properly spaced.

9. Use a level to check the entire deck’s surface and adjust individual boards or sections as needed.

Tips:

• Use a transit or laser level for larger projects.
• Take your time during the process. You want your deck to be stable and safe to use! 

What Do You Put Under a Ground-Level Deck?

You want to consider what to put underneath your deck to encourage ground-level deck ventilation and drainage, prevent weed growth, and protect the area underneath. Here are some standard options we recommend:

• Gravel or Crushed Stone: One of the simplest and most cost-effective options is a layer of gravel or crushed stone beneath the deck. This provides good drainage and helps prevent weed growth.
• Landscaping Fabric: Before adding gravel or crushed stone, lay down landscaping fabric to help suppress weed growth and provide a barrier between the soil and the gravel.
• Patio Pavers or Concrete Pads: Another option is to install patio pavers or concrete pads beneath the deck. This solid surface helps prevent weed growth and makes it easier to access the area for maintenance.
• Deck Skirting: Deck skirting with wood, composite, lattice, or metal is a decorative option that can be installed around the deck’s perimeter to conceal underneath.
• Under-deck Drainage System: This is ideal for decks with a slight slope or where drainage is a concern. These systems typically consist of panels or troughs installed beneath the deck joists to catch and redirect water away.

• Leave It Alone: Some people leave the area under the deck as natural vegetation. However, doing so requires regular maintenance to prevent weed growth and ensure proper drainage.

Ultimately, what to put under a ground-level deck will depend on budget, aesthetic preferences, and practical considerations for your yard!

Why is Ground Level Deck Ventilation Important? 

Having enough ventilation under your deck can help control moisture, prevent decay and pest infestations, and maintain structural integrity. If your deck is less than 12” above ground level, you’ll want to leave an open perimeter to encourage air circulation! 

We Love Deck DIYers

At UglyDeck, we love to support our local DIYers. Take advantage of our expertise and guidance so you can start enjoying the deck of your dreams. 

Learn more about how we can support you!

Maintenance-Free Decking Supplies and Professional Assistance

Our expert Twin Cities deck builders and Chicagoland deck builders are here for you at every step of the way, from professional consultation to quality product recommendations.

Whether you are a DIY homeowner looking to install your own deck rails or you want to enlist the help of professionals, UglyDeck.com can help with any of your decking and railing needs.  We can assist the DIY homeowner with How to Build a Composite Deck.  We also have an award-winning UglyDeck DIY Academy available to customers who desire a high-quality finished project.

Contact us today, or visit one of our showrooms to talk with a member of our UglyDeck.com team about all your decking needs and goals!