Correct Depth for Dig Out When Installing Artificial Turf: A DIY Guide

If you’re a DIY enthusiast preparing to install artificial turf, getting the base preparation right is essential for a successful, long-lasting installation. One of the most critical steps is determining the correct depth for the dig-out, which ensures proper drainage, stability, and a natural look. Here’s everything you need to know about how deep to dig for artificial turf and how to create an optimal sub-base.

How Deep to Dig for Artificial Turf Installation

For most artificial grass installations, digging to a depth of around 4 inches is ideal. This allows enough room for the base material, which provides the necessary stability and drainage for your turf. A depth of 4 inches strikes the perfect balance between being deep enough for a solid foundation and shallow enough to avoid major underground utility issues.

If you’re concerned about gas lines or other underground utilities, remember that most gas lines are buried between 18 and 24 inches. This depth means you’re unlikely to disturb them, but for added safety, you can call Blue Stakes, a free utility marking service. They’ll locate and mark any underground lines so you can dig with confidence.

Ground Preparation for Artificial Turf: Creating a Stable Base

Proper ground preparation is essential to prevent issues like sinking, pooling, or an uneven surface. Here’s a quick guide to creating an effective base:

 

1. 1. Remove Existing Turf and Debris: Begin by clearing any existing grass, rocks, or debris from the area where you plan to install the turf.

1. 1. Dig Out to the Right Depth: Dig down to about 4 inches, which is the optimal artificial grass installation depth for most projects. This depth provides enough room for a compacted base and infill, ensuring your turf stays even and well-drained over time.

1. 1. Add Base Material: After digging to the ideal depth, add 2 to 3 inches of a high-quality base material, ideally Blended Barrow, or 2.5 inches of ¾-inch gravel followed by 1.5 inches of crushed fines. This layer creates a firm foundation that supports the turf and prevents sinking.

1. 1. Compact the Base Material: Compacting the base material is crucial. Use a plate compactor to press the gravel firmly into place, creating a stable sub-base for your artificial grass.

Using a Gravel Calculator for Base Material

Once you know the depth of your artificial turf sub-base, you can estimate how much base material you’ll need. A gravel calculator is a handy tool that allows you to enter the dimensions of your turf area and your desired depth to get an accurate material estimate. These are easy to find online, like this one. This step ensures you buy the right amount of base material, saving you both time and money.