What is the minimum subgrade compaction required under concrete pavers?

The minimum subgrade compaction required under concrete pavers should be at least 95%. To ensure stability and prevent settling or shifting, a compaction level of 95% Standard Proctor Density is generally recommended for the subgrade. This level of compaction provides an adequate foundation that can support the weight of the concrete pavers and resist movement over time.

Compacting the subgrade to this level helps reduce the voids in the soil, which is essential for maintaining the integrity of the surface installed above. Additionally, this compaction adequately supports drainage and minimizes potential issues with erosion or heaving in colder climates.