cases, it may be necessary to build up the earth around them and compact it into a substantial berm that frames the edge pavers and gradually tapers into the surround- ing ground. Patio edges that remain above ground (to overcome sloped grades) are constructed over a short, mortared wall (built of block or stone with its first course recessed below grade). In this case, the edge pavers can be mortared onto the wall as a final course. The edging can simply be com- prised of the outer row of field pavers, a contrasting pattern of field pavers, or made of a different block or stone altogether. Three
edges of this patio were made of field pavers, but the side facing the uphill slope was finished with a row of taller edge pavers, installed to help divert runoff from the new patio surface. Joint sand is the key to provid- ing interlock between pavers and providing cushion between them that prevents paver-to-paver con- tact and chipping. The sand joint between pavers should be between 1/16 and 3/16 inch. Concrete sand that has coarse and angular particles is recommended over masonry sand, which has rounder, finer particles. The joints need to be completely full of sand to func- tion properly and promote interlock in the system.
WALKWAYS The paver walking paths were constructed in the same manner as the patios, but the ground beneath pitched away in different directions, which first required construction of a small drystack stone wall to retain the gravel base. The outer courses of the sidewalk pavers were mortared in place atop the drystack walls.
The project included three walk- ing paths, which were constructed much like the patio.
The exposed edges of the pavers will be buried by substantial landscaping so the patio surface will be just above ground level.
To accommodate the slope, a drystack stone wall was built to support the downhill side of the walkway, and the edge pavers were mortared onto the wall as the top course.