The sub base is a critical component for any type of artificial grass installation. In fact, the success of any installation largely depends on the foundation set by the subbase. Without it, it won’t take long for issues to come up with synthetic turf, from unpleasant smells to pooling water and, in extreme cases, turf failure. It also makes synthetic yard maintenance difficult.
So, what is a sub-base is? And what common types do we use for our own installations here at Santa Rosa Artificial Grass? We invite you to send us your questions if you have more after reading this.
What Is a Sub Base?
The sub base is the layer of compacted material installed before placing synthetic grass on top. It provides a stable, porous surface for draining water away from the artificial turf backing. Without a properly prepared sub base, you risk problems down the road like an uneven lawn or standing water.
Common Types of Sub Base for Artificial Grass
For artificial grass in front yards and backyards, common sub base materials are crushed stone, compacted soil, or sand. Each has pros and cons to weigh when deciding which works best for your project and site conditions.
Crushed Stone
Crushed stone is a popular choice recommended for its excellent drainage and stability. Angular stones with sharp edges compact tightly to form a rigid, porous layer that allows water to quickly pass through. Standard crushed stone sizes used are 3⁄4-inch or smaller aggregates like limestone or granite.
The downside of stone is mainly the cost and labor to install 6+ inches of material. Transporting and spreading the heavy material requires machinery and expertise, making crushed stone the most expensive sub base option. However, properly graded and compacted stone prevents erosion and provides ideal artificial grass support for d
Sand
Washed concrete sand makes an affordable, easy-to-install sub base. The fine grains compact firmly and drain well, while the smoother grains provide moderately good turf backing support. Install 4-6 inches of sand, depending on site conditions and project requirements.
Drawbacks to sand include potential erosion issues on sloped sites and less stability than stone. Additionally, sandy soils prevalent in Santa Rosa can blend with a sand sub base over time. This compromises compaction and increases the risk of funny spots or divots forming under the turf.
Compacted Soil/Dirt
Using and amending your native soil is the most budget-friendly sub base option. This method involves loosening, grading and compacting the top 5+ inches of soil to create a densely-packed earthen layer. Some projects may require tilling in additives like sand or gravel to achieve proper soil structure, stability, and drainage.
The main disadvantages with compacted soil involve uncertainty. Native soils vary tremendously, making consistent compaction and stability difficult. Localized dry spots or shifting soil can spell disaster for above-ground lawns. Additionally, light or sandy sites lack the firmness required for support over many years.
Get a Free Consultation
As local synthetic turf specialists, we’ve successfully installed hundreds of custom lawns in Santa Rosa and the surrounding wine country. We understand how critical proper sub base preparation is for durable, functional outdoor grass.
To determine the best sub base option for your unique space and needs, contact us today to schedule a free design consultation and quote. Discover why year after year, Santa Rosa homeowners and property managers choose us for beautiful, hassle-free artificial grass. Dial 408-723-4954 or send us a message to speak with one of our experts and get your project started on the right foot.
