The Complete Guide to Artificial Turf Sub-Base Installation in Sacramento

Why the Sub-Base Matters More Than the Turf

Ask any experienced artificial turf installer what causes premature failure and the answer is almost always the same: the sub-base. Not the turf product. Not the infill. The sub-base. Seams that lift after two years. Surfaces that develop low spots and puddles. Edges that buckle in heat. In almost every case, these problems trace back to inadequate sub-base preparation — skipped entirely, done with the wrong materials, or installed at insufficient depth.

Step 1: Soil Assessment and Drainage Planning

Before anything is excavated, we assess your existing soil conditions. Sacramento soils vary dramatically by neighborhood. Some areas have naturally good drainage and stable sub-soils. Others — particularly in Natomas, Elk Grove, and parts of Rancho Cordova — sit on heavy clay that holds water and shifts seasonally. This assessment determines excavation depth, drainage flow direction, and whether additional drainage infrastructure is needed.

Step 2: Excavation

We excavate to the appropriate depth for your application — typically 3 to 4 inches for standard residential installations, deeper for clay soil or poor natural drainage. All excavated material is removed from site. Installers who skip proper excavation — laying turf over existing soil with minimal preparation — are setting up early failure.

Step 3: Grading and Slope Engineering

Proper grading is the single most critical technical step in the entire installation. The excavated area must be graded to direct water flow away from structures and toward appropriate drainage points. Flat spots and low points will collect water, creating boggy areas and accelerating infill breakdown. Our crews use grade stakes and levels to ensure consistent, engineered drainage slope across the entire installation area.

Step 4: Class II Road Base Installation and Compaction

Class II road base — crushed aggregate used in road construction — is the structural foundation of a quality turf installation. We install it at appropriate depth then compact to 95% compaction using plate compactors. This prevents the surface from developing soft spots and depressions over time.

Step 5: Decomposed Granite and Weed Barrier

A decomposed granite topping layer provides the final drainage medium and smooth surface for turf installation. A commercial-grade geotextile weed barrier goes down immediately before turf — a heavy-duty permeable membrane, not cheap landscape fabric.