If there’s one place a project succeeds or fails, it’s here.

Base

Download the Build It Right™ Project Guide

Build It Right™ Stage 1

Patios that sink. Pavers that shift. Stone that cracks. Weeds pushing through decorative rock. Nine times out of ten, the material isn’t the problem. The base is. At American Stone we say it all the time: Stone doesn’t fail. Prep does.

The base is what supports everything above it. When it’s done right, your project stays level, drains correctly, and holds up through seasons of weather and use. When it’s skipped or rushed, problems show up quickly.

That’s why Build It Right™ always starts with Base.

Why Base Matters (The Science)

Stone and landscape materials behave differently than most building materials.

They move. Temperature changes, soil moisture, freeze-thaw cycles, and ground settling all affect what happens underneath your project. In Utah and across the Mountain West and Pacific Northwest, freeze-thaw cycles are especially important.
Water expands when it freezes. If water gets trapped under your patio or pathway, it can push materials upward and cause uneven settling when temperatures warm again.

A properly built base solves this by distributing weight evenly, allowing drainage, reducing soil movement and creating a stable surface for installation.Think of the base like the suspension system in a truck. You may never see it once the project is finished, but it’s doing the work that keeps everything performing the way it should.

The Four Key Elements of a Proper Base

Building the right base doesn’t require complicated engineering, but it does require understanding the key steps.

1. Excavation

Every project starts with removing enough soil to allow room for base materials. The depth depends on soil conditions, project load, material thickness and the climate conditions.
 

Typical patio installations require 6–12 inches of base material beneath the surface layer. Projects with heavier loads or softer soils may require deeper excavation.

2. Compaction

Loose soil shifts. Compacted soil stabilizes.
 

Compaction is one of the most important steps in the process and one of the most commonly skipped. Base materials should be installed in layers and compacted between lifts to prevent settling later.
 

This is where proper tools matter.

3. Drainage

Water needs somewhere to go.
 

A properly graded base ensures water flows away from structures and prevents pooling underneath surface materials. Even a small slope can make a big difference in long-term performance.

4. Separation Layers

Weed barriers and stabilization fabrics can help prevent soil mixing and reduce maintenance. In xeriscape projects, this step helps keep decorative rock clean and prevents sinking.

Planning Your Base Materials

Before starting your project, it helps to plan your base materials carefully. The Build It Right Project Guide walks you through this step by helping you calculate excavation area, base depth, the correct base material, the sand or leveling layers, and any additional stabilization materials.
 

Planning these quantities early prevents delays and ensures you have everything needed when installation begins.

Explore Base Materials

The right base materials depend on the type of project you’re building. Common base materials include:

Road Base

Compacted aggregate designed to create strong structural support for patios, pavers, and walkways.

Sand

Used as a leveling layer for certain surface materials.

Gravel & Drainage Stone

Helps improve drainage and prevent water buildup beneath surfaces.

Weed Barrier & Stabilization Fabrics

Keeps materials separated and reduces long-term maintenance.

Don’t Forget the Tools

The best base materials still need the right tools to perform properly. Compaction equipment, leveling tools, and installation supplies make the process faster and more precise. At American Stone we carry the tools and installation products professionals rely on every day.
 

If you’re unsure what tools you’ll need, our team can help you plan the installation before you start.

How American Stone Helps

We’ve helped thousands of contractors, landscapers, and homeowners build projects that last. Because we work with stone from the quarry all the way to the finished project, we understand how materials behave in the real world.

Our team can help you:

  • calculate base materials
  • plan excavation depths
  • select the right aggregates
  • prepare for installation

When you start with the right base, the rest of the project becomes much easier.

Plan Your Project

The Build It Right™ Project Guide helps you walk through each stage of your project, starting with base preparation. Download the planner to calculate materials and map out your project before you begin.

Download the Build It Right™ Project Guide

Once your base is prepared, it’s time to choose the main material that defines your project.

Next Stage: Surface