How to Properly Install Synthetic Turf Over Existing Grass

Laying artificial grass directly on top of a real lawn is a popular choice for homeowners seeking a low-maintenance lawn, but it requires careful preparation to ensure durability and water flow. A common misconception they can simply place the turf over the existing lawn, but this will lead to problems like poor drainage, bumpy terrain, and premature wear. The right approach involves removing the existing grass and building a level substrate.

First, eliminate all existing grass and 熊本 人工芝 施工 roots using a power sod remover or a sharp spade to take out both sod and underlying rhizomes. It is critical to remove at least two to three inches of soil along with the grass to establish a smooth, even base. Failing to fully remove vegetation will cause it to break down gradually, leading to depressions and an patchy surface.

Once the old grass is gone, slope the ground to ensure water drains clear of structures. Use a rake and leveling tool or a spirit level to verify the gradient. A slight grade of one to two percent is perfect for runoff. After grading, press the base with a hand tamper or power compactor to minimize subsidence.

Next, lay down a layer of crushed stone or gravel, typically 3–4" in depth. This layer provides drainage and a solid substrate. Apply consistently and tamp it down firmly. Then install a 1" topping of clean, graded sand on top of the gravel. This finer material helps produce a level bed for the turf and allows for better infill distribution.

When preparing to place the turf, install an edge restraint around the perimeter of the area. This keeps the edges secure over time and delivers a polished appearance. Roll out the turf making sure it is aligned properly and pulled taut to avoid wrinkles. Use a utility knife to shape around obstacles, leaving a slight margin if needed for post-installation cleanup.

Fasten with turf tacks every six to eight inches along the edges and seams. If you have combined panels, use seaming tape and adhesive to create seamless connections. Once the turf is in place, spread an even layer of infill—usually crushed quartz or EPDM pellets—over the surface. Use a broom or power broom to push infill into the blades. This step enhances stability, helps the blades stand upright, and extends lifespan.

Finish by lightly spraying with water to settle the infill and wash away particles. Avoid heavy foot traffic for the first one to two days to let everything settle properly. Ongoing care such as brushing the fibers and removing debris will keep your synthetic lawn looking fresh and functional for years. Proper installation is the key to a durable beautiful synthetic turf that demands almost no effort.