Installing synthetic turf requires more than just rolling out artificial grass. The base layers beneath it determine how well the surface drains, how long it lasts, and how comfortable it feels underfoot. Understanding what to lay under synthetic turf ensures that your installation is stable, safe, and durable for years to come.
A properly prepared base is crucial because synthetic turf is not just placed on bare soil. The base supports the turf system, prevents shifting, allows drainage, and helps maintain evenness. Without a stable foundation, the turf could develop bumps, depressions, or poor water flow over time.
For homeowners, sports facilities, or commercial spaces, a well-prepared sub-base also contributes to a natural appearance and better performance. It helps the turf resist compaction and provides a cushioned feel underfoot.
When preparing to lay synthetic turf, several layers are typically required. Each one plays a specific role in the overall performance of the installation.
The subgrade is the existing ground surface that must be leveled and compacted. All vegetation, roots, and debris should be removed. It’s essential to ensure the area has a slight slope for proper water runoff. The soil should be firmly compacted using a plate compactor to prevent settling.
A weed barrier prevents grass or weeds from growing up through the synthetic turf. It also adds a layer of protection against soil movement. For most residential or landscape applications, a durable geotextile fabric works well. It should be permeable enough to allow water drainage while blocking plant growth.
This is the structural foundation of the turf system. Crushed granite, limestone, or decomposed granite is typically used. The base material should be between 2 to 4 inches thick, depending on use. It must be compacted evenly to create a stable, level surface that promotes good drainage.
Recommended materials:
3/4” crushed rock for strong stability
3/8” decomposed granite for fine leveling
Avoid sand-only bases for heavy-use areas, as they can shift over time
A thin layer of fine crushed rock or sand (about 0.5 inch thick) is added to smooth the surface before turf installation. This layer allows for minor adjustments and provides a soft, uniform bed for the turf backing to rest on.
For installations in areas with heavy rainfall or poor natural drainage, a drainage mat or additional geotextile layer can be placed under the base. It enhances vertical water flow and prevents water pooling.
Shock pads are commonly used in playgrounds, sports fields, or pet zones. They provide added cushioning, safety, and resilience. The pad also helps absorb impact and can slightly improve the thermal comfort of the surface on hot days.
Excavate the area to remove topsoil (around 3–4 inches deep).
Compact the subgrade to achieve a firm base.
Lay the weed barrier fabric across the surface.
Add and compact crushed stone or gravel evenly across the entire area.
Apply a thin leveling layer of fine material to smooth out irregularities.
Install optional drainage or shock layers depending on use.
Roll out the synthetic turf and secure it after checking the surface for evenness.
Skipping Compaction: A loose base will cause dips and wrinkles. Always compact thoroughly at each stage.
Using Poor Drainage Material: Avoid fine sand or clay-based soil, as they retain water and cause puddling.
Ignoring Weed Barrier: Without a barrier, weeds can penetrate through seams or edges.
Neglecting Edge Support: Install bender boards or concrete curbing to keep the turf firmly in place.
Uneven Base Thickness: Inconsistent depth leads to visible unevenness once the turf is laid.
After installation, maintaining the integrity of your turf base helps prolong the life of the entire system. Avoid placing heavy objects in one area for long periods, and inspect for drainage problems after heavy rain. If the turf develops unevenness, lifting and re-leveling the surface may be necessary in rare cases.
Selecting a high-quality turf product ensures that your base preparation efforts are worthwhile. CMGRASS offers professional-grade synthetic turf solutions suitable for residential lawns, sports fields, and commercial projects. Their products are designed for durability, drainage efficiency, and natural appearance, making them an excellent choice for professional installations.
What you lay under synthetic turf determines how it performs above. A solid combination of compacted subgrade, drainage-friendly base material, weed barrier, and optional padding creates a smooth, resilient, and long-lasting artificial lawn. Whether for a backyard, rooftop, or sports facility, proper groundwork ensures your synthetic turf remains beautiful and functional for many years.
Previous:
Mobile Phone:
Wechart:
Contact Now