Paver Base vs. Sand: What Each Layer Actually Does

The difference between the compacted base and the sand setting bed under a paver patio, why both matter, and what happens if you skip one.

A paver patio has two very different layers underneath it, and confusing the two is one of the most common DIY mistakes — they are not interchangeable, and skipping either one shortens the life of the patio significantly.

Compacted base: the structure

The base layer (usually crushed stone or road base) is what actually carries the load and resists settling. It's spread in shallow lifts and mechanically compacted with a plate compactor, which is why ordering the compacted volume alone isn't enough — loose material compacts down by roughly 20%, so you need to order more than the final depth suggests.

Sand setting bed: the leveling layer

The thin sand layer on top of the base isn't structural at all — it's screeded perfectly flat with a straight edge so every paver sits at a consistent height. It's typically just 1 inch deep and is never compacted with a plate compactor, since that would disturb the flat surface you just created.

Size both layers for your own patio in the Paver / Patio Calculator.