
The perimeter of most brick paver installations need a whole paving stone on the outside frame to better secure the diamond cut pieces of the pattern. Cut pieces will definitely sink or move if left on the outside edge of paving stones. Also, the paver edge restraint, whether plastic pvc or cement bead, will perform better.
The second sign of this paver patio installation being installed by an inexperience landscaper is the rolling down of the paving stones on the outside edges. All too often, landscaping crews do not prep far enough out from the outside edges of the interlocking brick pavers. Therefore, the outside edges will settle or "roll down" from the rest of the paving stones since the paver base material past the edges was not prepped or even installed.
For brick walkways, 4-5" minimum prep is needed past the edges of the interlocking pavers. Paver Patios minimum prep is 8"-10" and Paver Driveways 10-12" prep of base material past the edges of the paving stones. This will not only help prevent the ever noticeable edge "roll down" by inexperienced brick paver contractors but also give your paver edge restraint the proper base to be installed upon.
When getting estimates on your interlocking brick paver or retaining wall installations, make sure you do some research on the experience of the brick paver contractor you are hiring. Not all landscapers are inexperienced in installing paving stones, but a majority just add this service to their expanded repertoire. Brick paver specialists and experts will perform all the major detail work and prep that will insure a long-term success of performance & appearance.