How to Build a Floating Stone Deck Over Grass or Dirt
A floating stone deck is a great way to create a practical outdoor living space that looks stylish but doesn't need heavy foundations or complicated construction. Instead of being fixed with concrete footings, a floating deck sits on a system of supports that rest directly on the ground. By using a proven pedestal and framing solution like the Outdoor Floor System®, you can achieve a professional-quality installation that looks great, drains properly, and remains stable over time.
Floating stone decks are popular because they are easier and faster to build than traditional decks, while still looking sleek and professional. In this guide, we talk you through the step-by-step process of building one, so you can create a solid and attractive outdoor space for entertaining, dining, or relaxing.
Why Choose a Floating Stone Deck
The biggest reason that people choose to go with a floating deck is the convenience, as they can be built over almost any existing ground surface. They don't require excavation or pouring concrete, meaning they avoid a lot of the time-consuming and expensive steps that a permanent installation would involve.
Floating decks are also very flexible, because you can easily change the size or even completely relocate them if you change your mind. When paired with the Outdoor Floor System®, you can also install them over uneven ground surfaces or sloped areas, because the system sits on supports that are adjustable.
Stone pavers make an especially good surface choice for floating decks. They are durable, weather-resistant, and available in a wide range of styles, from natural stone to porcelain. With proper installation, you’ll end up with a surface that not only looks great but can also handle heavy use year after year.
Planning and Preparation
As with any outdoor flooring project, good planning is essential. Start by measuring the area where you want the deck. Decide on the exact size and shape, and think about how the space will be used. Will it be a dining area with a table and chairs, or more of a lounge space with outdoor sofas?
Next, check the ground conditions. While floating decks don’t require foundations, the ground does need to be relatively stable. Very soft or loose soil may need to be compacted before installation. It’s also best to remove any thick grass or weeds, as these can interfere with the supports.
Finally, make sure you have enough clearance for drainage. One of the benefits of using pedestals or risers is that water can flow freely beneath the pavers. This prevents pooling and helps protect the materials over time.
Materials and Tools
For a floating stone deck, you’ll need the following materials:
- Stone or porcelain pavers
- Pedestal supports or risers (adjustable ones are best for uneven ground)
- Edge restraints or perimeter containment to keep the surface secure
The tools you’ll need include a tape measure, chalk line, level, rubber mallet, saw with a diamond blade for cutting pavers, and protective gear such as gloves and safety glasses. Having everything ready before you start helps make the installation process smoother.
Step One: Preparing the Ground
The first step is to prepare the surface where the deck will sit. Begin by clearing away grass, weeds, and any loose debris. If the ground is soft or uneven, you can compact it using a hand tamper or plate compactor. Having a solid and stable base is important as it prevents the supports from sinking or shifting in the ground over time.
If you want some extra stability, you can also place a layer of gravel or crushed stone over the soil. This is particularly good as it also helps with drainage while providing a firm foundation for the pedestal system.
Step Two: Setting Up the Pedestal Supports
Once the ground is ready, you should lay out the pedestal supports in a grid pattern according to the size of your pavers. For example, if you are using 24-inch by 24-inch pavers, your pedestals should be spaced every 24 inches in both directions.
With the Outdoor Floor System®, adjustable pedestals allow you to create a perfectly level surface even on uneven soil. Choose one corner of the planned deck to start at and work outward. As you go along, adjust the height of each pedestal so the tops are level, compensating for any unevenness in the ground. Having a spirit level to hand is useful here to make sure that you are staying consistent as you go along.
Step Three: Placing the Pavers
One of the biggest advantages of using the Outdoor Floor System® is its structural panels, which sit on top of the pedestals to form a rigid grid. These panels lock into place and distribute the load evenly, providing a secure platform for stone pavers or tiles.
Work methodically in rows so that you avoid leaving gaps or exposed supports. Take your time with this step, as accuracy here will give you a deck that feels solid and looks aligned.
Step Four: Cutting and Fitting Edges
Most outdoor spaces won’t measure out perfectly to the size of your pavers, so you’ll probably need to cut some to fit along the edges. Measure carefully, then use a saw with a diamond blade to make clean cuts. Always wear protective gear while cutting.
Place cut pavers along the perimeter, where they will be contained by edge restraints. Taking care at this stage makes a big difference to the finished appearance of your deck.
Step Five: Securing the Perimeter
To prevent pavers from shifting over time, it’s important to secure the perimeter of the deck. Depending on your setup, you may use edge restraints that anchor into the soil or raised edging elements that lock the pavers in place.
A neat edge also improves the overall look of the deck. It frames the surface, gives it definition, and helps it blend seamlessly with the surrounding landscape.
Step Six: Final Checks and Finishing Touches
Once all of the pavers are in place and the perimeter is secure, walk across the deck to check for stability. There should be no rocking or movement underfoot. If any paver feels loose, adjust the pedestal heights until it sits firmly.
Step back and review the alignment of the deck. Rows should look straight, and spacing between pavers should be consistent. Small adjustments now will make a big difference to the end result.
When everything is secure, you can start adding finishing touches. Outdoor furniture, planters, and lighting will bring the space to life, turning it into a comfortable and inviting outdoor room.
Maintenance Tips
A floating stone deck requires very little maintenance, but it’s still worth giving it some attention now and then. Sweep the surface regularly to keep it free of leaves, dirt, and debris. Wash with water and mild detergent if needed to keep the pavers looking fresh.
Once a year, check the pedestal system to make sure it’s still level and stable. If any areas have shifted due to soil movement or settling, you can easily adjust the pedestals to bring them back in line. Since the pavers can be lifted individually, access for adjustments or repairs is straightforward.
Safety Considerations
As with any building project, it’s important to work safely. Lifting and cutting pavers can be heavy and hazardous, so wear protective gloves, glasses, and sturdy footwear. Always use tools according to manufacturer guidelines.
If the deck is raised significantly above ground level, you may also want to install railings or edging for added safety.
Conclusion
Building a floating stone deck over grass or dirt is a practical way to transform your outdoor space without complex construction. By using the Outdoor Floor System, you can achieve a stable, level surface that drains properly and looks as polished as a permanent installation.
Whether you’re aiming for a simple patio area or a fully furnished outdoor living room, a floating stone deck is a flexible and stylish solution that can be tailored to suit your needs.
