Permeable base rock and regular base rock serve very different purposes. Contractors, engineers, and architects need to know which to specify for strength, drainage, and compliance. This article breaks down Caltrans standards, structural performance, and practical applications to help you choose the right base material for projects across Marin, Napa, Sonoma, and Solano counties.

Discover why drain rock is one of the most versatile materials for landscaping and construction across Marin, Napa, Sonoma, and Solano. From French drains and driveways to erosion control and decorative creek beds, North Bay Materials delivers the right size rock straight to your project site.