GRAVEL PAVERS We actually use three sizes of gravel when installing a gravel roads. The first layer of gravel pavers should consist of baseball size rocks, which are often called #3 Gravel Stone have used many applications in construction. These stones structure a solid establishment for your driveway and ensure good drainage to pull the water away.This foundation layer also keeps the smaller rock from disappearing into the soil and prevents the spread of gravel and keeps the gravel from moving. You’ll install approximately a 4 inch layer of this aggregate of one or more minerals or rock. When you begin laying the rock you should smaller each layer with a rolling machine prior to applying the following layer. All this if seems like a lot of work, consider hiring professional services. Installing a gravel driveway is a big task for the average homeowners, but a professional with the right equipment can complete the job in a few days than expected time.