Negatives of a Rock Driveway

Encroachment

• Wayward grass and weeds are a hassle for every type of driveway, but an unpaved surface is especially vulnerable to encroachment. Pulling weeds that grow through the sides and surface is tedious and difficult. One of the best ways to combat encroachment is to lay down geotextile fabric over the bottom of the sub-base during installation. For an existing driveway, spray weed killer over the weeds and install edging over a gravel base to prevent underground roots from spreading beneath the driveway.

Drainage Issues

• Even a well-laid rock driveway is subject to drainage issues. Once the ground gets waterlogged, the base rocks sink and dips form in the surface, which lead to puddles and erosion. An underground drainpipe beneath the driveway or along the sides will help carry excess water away toward the street. In addition, plan to regularly rake the surface gravel into a crown so water naturally flows to the sides.

Containing Rocks

• A common problem with all rock driveways is displacement. The pressure of faster moving, heavy vehicles can scatter surface rocks into the surrounding lawn, creating messy edges and potential hassles when mowing. A simple way to maintain clean edges on a loose rock driveway is to install strong edge restraints. Use landscape timbers or medium-size field stones to accentuate the natural look while sitting high enough to contain dislodged rocks.

Replenishment

• Where paved driveways require a fresh coat of sealant every few years, rock driveways call for replenishment every year or two. Small rocks break down into dust over time while weather and use wear down larger stones. Plan to keep the surface 1 to 2 inches above ground level so water flows off the sides. Spread new layers of rocks with a spreader truck if the driveway is long, or dump the gravel in piles and rake it into place.