Chapter 01 — Why paver patios fail
Almost never the pavers.
It is the base, the edge, or the water.
A paver patio that has sunk in the middle, lifted at a corner or grown weeds along every joint has rarely failed because of the paver. Pavers are concrete or stone; they are the most durable part of the assembly. What fails is underneath and around them.
There are three usual causes. A base that was too shallow or never properly compacted, so it consolidates unevenly under load. A missing or under-fixed edge restraint, which lets the outer courses creep outward and opens every joint behind them. Or water — either no fall designed into the surface, or nowhere for it to go once it gets there.
None of that is visible when the job is finished. Two patios can look identical on handover day and be completely different five years later. That is why this page spends more time on the excavation than on the pattern.

- Large-format paver fieldvisible in this frame
- Running-bond patternvisible in this frame
- Border course at the edgevisible in this frame
- Level change to the spavisible in this frame
- Fall set away from the wallvisible in this frame
In layers, not all at once
Base material is compacted in lifts rather than dumped and rolled once. A base compacted in one thick layer is dense on top and loose underneath.
Every open edge
Edge restraint holds the perimeter courses in place. Without it the field creeps outward under load and every joint behind it opens.
Away from the house
A patio is designed with a slope so water runs off it, and somewhere for that water to go. Flat looks right and drains nowhere.


























