The best base for artificial turf is four inches of crushed granite, compacted in layers, over a weed barrier on graded soil. This sub-base controls drainage, prevents settling, and determines whether your turf lasts five years or 20.
We’ve installed over 10,000 artificial turf projects across Texas and Florida, so we’ve seen firsthand where installations succeed or fail. The base layer makes the difference every time.
Quick Answer About the Base for Artificial Turf
A proper base for artificial turf has three layers: graded native soil, geotextile weed barrier, and four inches of compacted crushed granite. Skip any layer, and you’ll deal with drainage problems, uneven surfaces, and a turf replacement in two to three years. Get a free estimate to find out what your yard needs.
Why the Base for Artificial Turf Matters
The turf you see is about half the equation. The base you don’t see determines drainage, stability, and lifespan.
A solid base for artificial turf prevents the surface from sinking or developing low spots. The sub-base creates the drainage path that moves water away from the surface, and a level base holds up for 15–20 years.
We’ve ripped out plenty of failed installations from other companies. The turf itself was fine. The base was the problem every time: not enough depth, wrong material, or poor compaction.
The Three Layers Under Artificial Turf
Layer One: Graded Native Soil
Excavate four inches of existing grass and soil. Grade the exposed ground to slope at a 1–2% grade away from structures so water has somewhere to go. Compact the graded soil with a plate compactor.
In Texas, clay soils expand and contract with moisture, so proper grading prevents water from pooling under the base. In Florida, sandy soils drain faster but still need grading to direct water away from your home.
Layer Two: Geotextile Weed Barrier
Lay commercial-grade geotextile fabric over the compacted soil. This barrier stops weeds from growing through the turf and separates the soil from the base material.
A weed barrier isn’t optional. Without one, weeds push through within months, and soil migrates into the crushed granite, which blocks drainage over time.
Layer Three: Four-Inch Crushed Granite Sub-Base
The crushed granite sub-base is the backbone of every high-quality artificial turf installation. We use four inches of crushed granite, compacted in lifts (two inches at a time) with a plate compactor.
Crushed granite compacts into a firm, stable surface. The angular particles lock together and hold firm, which means your turf stays flat and level underfoot for years. Water passes through the gaps between particles and drains into the soil below.
Some companies use two inches to cut costs. That’s a mistake you’ll pay for in two to three years when the turf starts settling, developing low spots, and holding water. Learn more about artificial grass drainage and why it matters for your yard.
Best Sub-Base Material for Artificial Turf
Not all base materials perform the same.
We recommend crushed granite for residential installations in Texas and Florida. Crushed granite handles heat expansion, heavy rainfall, and long-term performance demands better than alternatives, so your turf stays stable through every season. Decomposed granite is an acceptable substitute.
Sand alone is never a good sub-base. Sand doesn’t compact into a stable surface and moves underfoot.
Some installers mix sand into their base to save money. The result is a soft, uneven surface within months.
How the Base for Artificial Turf Affects Drainage
Drainage is where the base either proves its worth or falls apart.
Our Triflow™ Backing drains 900+ inches of liquid per hour, so your yard clears standing water in minutes, not hours. If the base below can’t handle that volume, you’ll have puddles, standing water, and eventually mold and odor problems.
Four inches of crushed granite with proper grading handles Texas thunderstorms dumping two to four inches per hour and Florida’s 50+ inches of annual rainfall.
A good artificial grass installation process starts with the base for artificial turf. The rest of the installation depends on getting the base right.
When the Base for Artificial Turf Goes Wrong
We’ve seen every base failure across our 10,000+ installations: settling and low spots from insufficient depth, standing water from poor grading, turf wrinkles from loose base material, and edge lifting from inadequate compaction.
Budget installations typically use two inches of base material instead of four. The homeowner saves a few hundred dollars upfront and pays $10,000–$20,000 for a full reinstallation within a few years. The right base for artificial turf costs more on day one and saves you from doing the job twice.
Our installations include a four-inch crushed granite base and Triflow Backing that drains 900+ inches of liquid per hour. We use PFAS-free, 100% lead-free turf, so your family and pets play on a safe surface. Every residential project comes with a 15-year warranty, and that warranty wouldn’t be possible if we cut corners on the base.
Infill and the Layers on Top of Artificial Turf
After the base and turf are in place, artificial turf infill is the final layer. Infill keeps turf blades standing upright, adds weight to hold the turf in place, and creates a natural feel underfoot.
Silica sand works for most residential yards. For pet owners, OptiFILL+ is the better choice for odor and bacterial control. Pair OptiFILL+ with our Microguard® antimicrobial coating, which reduces bacteria by 99%, so your yard stays clean and odor-free.
Your artificial grass maintenance routine is tied to how well the base was built. Proper drainage means less cleaning, less odor, and less work for you.
Frequently Asked Questions About the Base for Artificial Turf
How deep should the base be for artificial turf?
Four inches of compacted crushed granite is the standard for residential installations in Texas and Florida. Less than four inches leads to settling and drainage problems.
Can you lay artificial turf on dirt?
Laying artificial turf on bare dirt won’t work. Dirt moves with moisture, compacts unevenly, and won’t drain properly. Always install a weed barrier and a compacted crushed granite sub-base.
What is the cheapest base for artificial turf?
Decomposed granite costs less than crushed granite and works for light-use areas. Don’t use sand alone, and never skip the base entirely. The cheapest option long-term is getting the base right the first time, not paying for a full reinstallation when the turf fails early.
How long does it take to install the base?
Most residential base installations take one day. The full artificial turf installation, including base work, turf, and infill, takes two to four days.
Does the base need to be replaced when you replace the turf?
A properly built base can last through multiple turf replacements. If the original base was done right, you can install new turf on top of the existing sub-base with minor touch-ups.
Is crushed granite or decomposed granite better for turf?
Crushed granite compacts tighter and drains more consistently than decomposed granite. We use crushed granite on most projects in Dallas, Houston, Austin, San Antonio, Tampa, and Sarasota.
Build Your Yard on the Right Base for Artificial Turf
We’ve installed over 10,000 artificial turf yards in Texas and Florida. Every one of those projects started with a four-inch crushed granite base, compacted right, graded right, and built to drain.
David Turner, our owner, personally oversees every installation, so you know the base under your turf meets the same standard we’d put under our own. That’s why we back our work with a 15-year warranty.
Get a free estimate for your artificial turf project, or call us at (469) 940-7737. We’ll show you what a proper base for artificial turf looks like and why it makes the difference between turf that lasts five years and turf that lasts 20.