How to install artificial grass on soil
To install artificial grass on soil, you must first excavate the area, lay down a base of crushed stone and sand for drainage, compact it thoroughly, and then install the artificial turf. Proper preparation prevents settling and ensures longevity.
Installing artificial grass directly onto soil is a common and effective method, provided you prepare the ground properly. This process ensures a stable foundation, good drainage, and a long-lasting, natural-looking lawn. Skipping essential prep steps will lead to a sunken, uneven surface and potential drainage issues down the line.
The key to a successful installation is creating a well-draining base layer. This typically involves excavation, followed by layers of crushed stone and sand, all compacted to create a firm surface that mimics the feel of natural soil but offers superior stability and drainage. You’ll need basic landscaping tools and some patience, but the result is a low-maintenance, beautiful lawn.
Excavate the installation area
Begin by marking the perimeter of the area where you’ll install the artificial grass. Use stakes and string to create clean lines. You then need to excavate the soil within this perimeter. The depth of excavation depends on the thickness of your artificial grass and the type of base material you plan to use. A common depth is between 3 to 4 inches (7.6 to 10 cm). This depth accounts for the drainage layer and ensures the final artificial grass surface is level with surrounding hardscapes, like patios or walkways, preventing tripping hazards.
Use a shovel for smaller areas or a sod cutter for larger lawns. Aim for a consistent depth across the entire area. Once excavated, remove all grass, roots, weeds, and large stones. This step is critical because any organic material left behind will decompose, leading to settling and unevenness in your artificial turf over time.
Install a weed barrier
Before adding any base material, lay down a layer of landscape fabric or a specialized weed barrier. This fabric prevents weeds from growing up through the artificial grass and also helps to stabilize the soil base. Ensure the fabric overlaps by at least 6 inches (15 cm) and extends slightly up the edges of the excavated area. You can secure it with landscape staples to keep it in place.
Add and compact the crushed stone base
The first layer of your base will be crushed stone, typically 3/4-inch (1.9 cm) minus gravel. This material provides excellent drainage and structural integrity. Spread an even layer of crushed stone, about 2 to 3 inches (5 to 7.6 cm) deep, across the entire excavated area. Use a rake to level the stone as much as possible.
After spreading the stone, it’s crucial to compact it thoroughly. You can use a hand tamper for small areas or rent a plate compactor for larger lawns. Compact the stone in layers, no more than 1-2 inches (2.5-5 cm) at a time, to achieve maximum density. A well-compacted base prevents the ground from settling later, which is essential for a smooth artificial lawn.
Add and compact the sand layer
On top of the compacted crushed stone, add a layer of coarse sand, about 1 inch (2.5 cm) deep. This sand layer fills in the gaps between the stones, creating a smoother surface for the artificial turf and providing additional stability. Level the sand using a screed board or a long, straight piece of lumber.
Lightly mist the sand with water and then compact it again using the hand tamper or plate compactor. This compaction is vital to ensure the sand layer doesn’t shift or settle after the turf is installed. A final pass with a rake will smooth out any imperfections before laying the turf.
Lay and secure the artificial grass
Carefully unroll the artificial grass over the prepared base. Allow the turf to relax in the sun for a few hours before cutting; this makes it more pliable and easier to work with. Trim the edges using a sharp utility knife, following the contours of your installation area. Cut from the back of the turf for a cleaner edge.
Once the turf is cut to size, secure it to the ground. For soil installations, you can use U-shaped landscape spikes driven through the turf backing and into the compacted base, spaced about every 4 to 6 inches (10 to 15 cm) along the edges and seams. If you have a perimeter edge (like concrete or wood), you can adhere the turf using a strong outdoor adhesive specifically designed for artificial grass.
Infill the artificial grass
After securing the turf, you’ll need to add infill. This is typically a granular material like silica sand or specialized artificial turf infill. The infill helps to weigh down the turf, keep the blades standing upright, and protect the backing from UV damage. Spread the infill evenly over the surface using a broadcast spreader or a stiff brush.
Rake the infill into the turf blades to distribute it evenly. You may need to repeat this process a couple of times to ensure the infill reaches the base of the turf fibers. A power broom can also be used to help work the infill down and brush up the blades for a more natural look. The amount of infill needed will vary depending on the type of turf you’ve chosen.
Final brushing and clean-up
The final step is to brush the artificial grass blades upright. Use a stiff-bristled broom or a power broom to brush against the natural lie of the blades. This creates a lush, uniform appearance. Once you’ve finished brushing, clean up any excess infill or debris from the surrounding areas. Your new artificial lawn is now ready for use.
Common mistakes during artificial grass installation on soil
| Step/Tool | Typical Mistake | How to Avoid It |
|---|---|---|
| Excavation Depth | Not digging deep enough | Excavate at least 3-4 inches (7.6-10 cm) to accommodate base layers and ensure a flush finish with surrounding surfaces. |
| Weed Barrier | Skipping the weed barrier | Always install a high-quality landscape fabric to prevent weed growth and stabilize the base. |
| Compaction | Insufficient compaction of base layers | Compact the crushed stone and sand layers thoroughly using a plate compactor or hand tamper to prevent future settling. |
| Infill Application | Uneven or insufficient infill | Apply infill evenly and rake it thoroughly into the turf fibers to ensure proper blade support and longevity. |
FAQ
How long does artificial grass last when installed on soil?
When installed correctly with proper base preparation and infill, artificial grass can last between 10 to 15 years, sometimes even longer, depending on the quality of the turf and the climate conditions.
Can I install artificial grass over existing grass?
While you can technically lay artificial grass over existing grass, it’s highly discouraged. The organic material will decompose, leading to an uneven surface, odors, and potential pest issues. It’s always best to remove existing grass and prepare the soil base.
How do I handle drainage with artificial grass on soil?
The crushed stone and sand base layers are designed to facilitate drainage. Ensure the area has a slight slope away from structures, and the base materials are compacted to allow water to pass through the turf and into the ground.
