Road Base Rock Gravel 3/4"minus Virgin (Class II Base, Road Pack, Virgin Base)

Road Base Rock, also known as Class II Base, 3/4" Base Rock, Road Pack, or Virgin Base, is a compactable crushed aggregate used to create strong, stable foundations for construction and landscaping projects. This material is a blend of crushed rock and fines (dust) that compacts tightly to form a solid, load-bearing base layer.

Common Uses

• Driveways and parking areas

• Paver and patio base

• Base for concrete and asphalt

• ADU foundations

• Roads, pathways, and access roads

• Site prep and ground stabilization

Road base is widely used because it compacts well, resists shifting, and provides long-term durability.

Material Specs

• Type: Crushed aggregate with fines

• Size: 3/4” minus gravel (includes rock + dust)

• Color: Gray (may vary by quarry)

• Feature: Designed for compaction

The fines act as a binder, allowing the material to lock together and harden when compacted.

Installation Tips

• Install in 2–4 inch layers

• Compact each layer

• Lightly wet before compacting

Most projects require 3–4 inches of compacted base.

Delivery Information

• Sold in bulk only (no bags)

• Delivered by dump truck

• For bulk volume discounts use the quote request form

Load Sizes:

• Small truck: 5–7 cubic yards

• Large truck: 17–20 cubic yards

We deliver road base rock gravel across: Marin, Sonoma, Alameda, Contra Costa, Solano, San Francisco, and San Mateo counties.

Frequently Asked Questions – Road Base 3/4" Rock

What is Virgin Base Rock Road Gravel made of?

Road base is made from crushed stone mixed with fines (dust). This combination allows the material to compact tightly, creating a strong and stable base for construction and landscaping projects.

What does "Class II Base" mean?

Class II Base is a specification used in construction that refers to a graded aggregate mix designed for compaction and structural support. It’s commonly used under roads, driveways, pavers and concrete.

What size is Road Base Rock?

Road base is typically 3/4” minus, meaning it contains:

• Rocks up to 3/4 inch

• Smaller aggregate

• Fine dust

This mix is what allows it to lock together and compact properly.

How much road base do I need?

Coverage depends on depth:

• 1 cubic yard covers approximate:

  • 150 sq ft at 2” depth

  • 100 sq ft at 3” depth

  • 75 sq ft at 4” depth

Most projects require 3–4 inches of compacted base.

Does Road Base need to be compacted?

Yes — compaction is critical.

For best results:

• Install in layers (2–4 inches at a time)

• Use a plate compactor or roller

• Lightly wet the material before compacting

This creates a solid, long-lasting surface.

Can I use Virgin Road Base for Driveways?

Yes — road base is one of the best materials for driveways.

It provides:

• Excellent compaction

• Load-bearing strength

• Resistance to ruts and potholes

What is the difference between Virgin Road Base and Gravel?

• Road Base: Contains fines → compacts solid

• Gravel: Typically clean rock → does not compact as tightly

Road base is used for foundation, while gravel is often used for surface or decoration.

Does Road Base get muddy?

When properly compacted, road base forms a firm surface that resists mud. However, before compaction or during heavy rain, it may appear muddy due to the fines.

Can Road Base be used under pavers or concrete?

Yes — it is commonly used as a base layer under pavers, patios, concrete slabs and under ADU's to prevent settling and cracking.

How is Virgin Road Base Rock delivered?

• Delivered in bulk via dump truck

• No bags or small quantities

• Dumped in one pile at your location