Gravel Driveway Options

Limestone Gravel

• Limestone gravel is a low-cost product that provides a good driveway that lasts for many years. The key to getting the most out of any rock drive is to have it drain properly. Drains need to be in place before the rock goes on the ground. Rock drives also last longer when installed in layers. Start with a layer of limestone that is rough-cut and about the size of baseballs. The rough edges do a better job of keeping the rocks from shifting over time than smooth stones. Place another layer of slightly smaller rough-cut limestone gravel on top of the base. For the top layer, use Number 57 limestone, which is about the size of a ping-pong ball. The surface of the limestone driveway needs to be slightly higher in the center to allow rainwater and snow to quickly flow away from the driveway. For safety's sake, you should install a lawn edging or mulch along the side of any rock drive to help prevent the lawnmower from hitting rocks as you mow.

Decomposed Granite

• While limestone is generally a gray color, other types of crushed stone give your driveway more curb appeal. Decomposed granite, or DG, is a favorite product that offers a number of color options. Because of its costs, DG is the top layer over a bed of less expensive limestone. Once it's on the surface, the DG is compacted in place. Heavy rains can disturb the surface, but you can simply rake the loosened DG back into place on the stone driveway and compact it again.

Recycled Asphalt Product

• Newer gravel driveway options include using recycled materials. Recycled asphalt product (RAP) is an example. This gravel-like mixture is a combination of crushed concrete, brick and asphalt taken from demolition sites. It can go over a limestone gravel base, and it drains well. Because it compacts well, a RAP driveway doesn't shift much during rainy weather.