The residential hardscaping market has exploded, and the single-direction gasoline plate compactor is the absolute backbone of that industry. When laying an interlocking paver patio or a retaining wall, the visual finish is only as good as the subbase beneath it. If you don't achieve maximum density in your crushed aggregate base, the pavers will inevitably settle, rut, and shift after the first winter freeze-thaw cycle.
The most common mistake I see DIYers and rookie contractors make is ignoring the "rule of lifts." They will dump 250 mm [approx. 10 inches] of crushed concrete or gravel into an excavation and try to run a lightweight 60 kg [approx. 132 lbs] plate over the top. The dynamic force of a small plate only penetrates about 75 mm to 100 mm [approx. 3 to 4 inches]. The top looks solid, but the bottom remains completely loose. For proper base prep, you must spread the aggregate in thin lifts—no more than 100 mm [approx. 4 inches] at a time—and run the compactor in overlapping passes until the machine's pitch changes from a dull thud to a sharp, ringing "crack," signaling that the stone has achieved refusal.
Once the base is locked in and the pavers are laid on their 1-inch sand bedding, the plate compactor comes out one last time. But you cannot run raw steel over decorative paving stones; it will crush the textures and leave massive white scuff marks. We attach a heavy-duty polyurethane paving pad to the bottom of the base plate. This thick rubber mat dampens the harsh impact of the steel while still allowing the high-frequency vibration to travel through the pavers, driving the polymeric joint sand deep into the crevices and locking the entire patio together into a monolithic structure.
