What Do They Use to Prepare a Backyard for Paving?

Excavation

• The first step in preparing a site for paving is to excavate. In addition to removing the top layer of grass and any root systems below the surface, the foundation should be at least 6 inches deep for a patio or walkway, and 12 inches for a driveway. If your budget allows, a rented excavator machine will do the majority of the digging, and a flat shovel will make straight, vertical cuts down the sides. Manual excavation requires a shovel and a good deal of physical effort.

Compaction

• Compacting the loose dirt at the bottom of the foundation, also known as the subsoil, removes excess moisture and air pockets from the ground. If you rent a compactor machine, start at the center of the site to familiarize yourself with the machine before compacting near the sides. Make three passes over the entire surface to make it as firm as possible. To compact the ground manually, use a hand tamper. This is a simple tool with a flat bottom that you pound against the surface until feels firm. You'll need to repeat this process for the gravel foundation.

Gravel

• Besides the pavers, gravel is one of the few materials you need to prepare a site for paving. Gravel foundations prevent the surface pavers from sinking into the ground and also block weeds from developing underneath. Use medium or 3/4-inch gravel with sharp, irregular shapes. These rocks wedge snugly together when compacted, leaving just enough space for moisture to seep through and to absorb ground tension so the surface won't crack.

Edge Restraints

• If you're not laying the pavers in mortar, edge restraints will keep the materials from moving out of place. Use flexible restraints if the edges are curved, and metal, timber or PVC strips for straight edges. Restraints should be installed directly over the gravel foundation against the inner walls. Hammer long 9- to 12-inch nail spikes through the edging to fasten it securely to the ground.