Why does the base matter so much on sandy, wet ground?
Pavers rarely fail because of the paver. They fail because of what is under it. In South Florida sand, a weak base can settle, wash out in heavy rain or shift under a car.
A sound installation usually runs in this order: dig out the top layer, compact the soil, lay and compact a crushed rock base, spread a thin bedding layer of sand, set the pavers, fit edge restraints and sweep in joint sand. Crushed limerock and other crushed aggregates are both used locally.
Palm and oak roots, buried irrigation lines and a high water table all affect how deep to dig and where water exits. A driveway needs a thicker base than a patio. Ask any contractor what base depth and material they plan to use, and why. A vague answer is a warning sign.
