Traditional Block Paving

Design Patterns

• Traditional paving blocks come in rectangular shapes of different sizes with the same thickness. Large and small blocks of various earthy colors can be arranged like a geometric puzzle to create visual interest. A few classic patterns to consider for uniform blocks include circle designs and arches, a running bond pattern, herringbone and basket-weave. Try out different patterns by dry-laying them over your site, or use an interlocking block pattern with precut shapes and beveled sides that lock together.

Foundation

• Paving blocks are thicker and larger than bricks, pavers and other materials, so it takes a thicker base to support them. The crushed rock foundation should be 6 to 8 inches thick for a patio or path, and 10 to 12 inches for a driveway. Compact the subsoil first, and then pour in and compact the foundation. The irregularly shaped crushed rocks wedge together into a firm surface when compacted. Rocks will absorb tension when the ground freezes and enable underground moisture to escape. Once the rocks are level, top the foundation with an inch of coarse sand to grip the bottoms of the blocks.

Installation

• Installing block paving is similar to dry-laying bricks and tiles. Always place the blocks on the sand rather than sliding them in place. Butt the blocks up against each other in your planned pattern, beginning at one edge. After each row or section, set a plank over the top and walk on top of it to apply even pressure so the blocks sit level.

Maintenance

• In addition to aesthetics and versatility, paving blocks are chosen for their durability. Well-laid block paving can last for many years, and there are a few steps you can take to extend their longevity. Edging restraints such as timber and metal should be installed in the ground against the perimeter of the blocks to keep them from shifting and to deter encroaching plants. Fill the fine joints between the blocks and restraints with sand to cushion them. Wait a few weeks after installing the surface for the white chalky substance on top of the stones or bricks to wear away, and then seal the surface to protect it from water damage.