What is the minimum aggregate base thickness required for installing concrete pavers for walks?

The minimum aggregate base thickness required for installing concrete pavers for walks is critical for ensuring proper load distribution, structural stability, and drainage. An aggregate base of 4 inches is generally recommended because it provides a stable foundation that helps prevent settling or shifting of the pavers once installed. This thickness allows for adequate compaction, which is necessary to support both the weight of the pavers and any foot traffic they will bear.

Additionally, a 4-inch base creates room for effective drainage, reducing the risk of water pooling or incorrectly permeating the surface, which can lead to erosion or destabilization over time. The choice of this thickness balances the need for strength and stability with practical considerations in material availability and labor.

Thinner bases, such as 2 inches, may not provide adequate support and can lead to the pavers sinking or cracking, while a 6 or 8-inch base may be unnecessarily excessive for standard walkways unless specific soil or traffic conditions warrant additional depth. Thus, the recommendation of 4 inches ensures a reliable, long-lasting installation of concrete pavers for walks.