Aggregate Base Course (1.5″ Minus, Non-Spec, Subbase)

Aggregate Base Course, Non-Spec, Subbase, 1.5” Minus

Aggregate Base Course in a 1.5" minus size range is a blend of crushed stone, gravel, and fines, designed for use as a foundational layer beneath roads, driveways, and concrete slabs. The "non-spec" attribute means this material is not produced to meet strict state or DOT specifications, making it a cost-effective choice for projects where certified gradation is not required. As a subbase, it provides essential support and load distribution for overlying surfaces.




The 1.5" minus sizing indicates that the largest particles are 1.5 inches in diameter, with smaller particles and fines filling the gaps. This gradation allows for excellent compaction and stability, reducing the risk of settling or shifting over time. Common applications include residential driveways, parking pads, walkways, and as a subbase for patios or light commercial projects. While non-spec material may contain more fines and occasional oversized pieces, it offers good drainage and compaction at a lower price point, making it ideal for budget-conscious builds where strict material standards are not necessary.