Artificial grass term

What is class ii road base?

Class II road base usually refers to a graded aggregate base meeting a particular public-agency or local specification. The exact term is regional; a supplier or installer should identify the governing specification rather than relying on the label alone.

Also called: Class 2 aggregate base, Class II base, road base

A specification matters more than the regional label: gradation and compaction determine how the base behaves.

Why it matters

A recognized specification can make aggregate more comparable, but highway material requirements do not automatically determine the best residential turf assembly. Site drainage and finish requirements still govern.

How it is used

Specified aggregate is placed, moisture-conditioned, graded, and compacted. In California, Caltrans distinguishes aggregate-base classes and provides requirements for public works; local turf proposals may use the phrase more loosely.

The money question

How can it affect project cost?

Material availability, hauling, depth, excavation, access, and compaction drive cost. A formal specification may improve consistency but does not create a universal price.

Common mistakes

Assuming Class II means the same specification nationwide
Confusing loose depth with compacted depth
Treating a road specification as a complete turf drainage design

Questions to ask an installer or supplier

Which agency or supplier specification defines this material?
What compacted depth and density are intended?
How will the final grade and drainage be verified?

Sources and review

Editorially reviewed July 18, 2026. General educational guidance; verify product claims and site conditions for your project.

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