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What Kind of Gravel Should I Put on a Sloped Driveway?

By Julie Christensen ; Updated September 21, 2017
Check with local zoning laws to determine the depth of gravel required.

Gravel makes an attractive, inexpensive material for driveways, especially in rural areas. A sloped driveway creates some special challenges, though, because the gravel can become unstable due to erosion, mud or traffic. Select gravel that has sharp, rather than round edges. The sharp edges become knitted together to form a stable surface, while round bits of rock tend to slip and slide more.

Step 1

Build the driveway on hard, compacted earth. Soft, soggy earth makes a poor foundation for a driveway. Ensure that the middle of the driveway is slightly higher than the edges so water drains efficiently. If the driveway is very sloped or curving, build ditches a few feet from the driveway to drain water.

Step 2

Lay sheets of heavy-duty landscaping fabric over the soil to keep the dirt from mixing with the gravel. This may not be practical on long driveways.

Step 3

Lay a 6- to 8-inch layer of crushed, baseball-sized stone on the driveway. This stone may be referred to as #3 stone, depending on the quarry. Rake it to smooth it. Compact the stone with a mechanical roller or tamper.

Step 4

Add 4 inches of slightly smaller rock, such as #57 gravel, to the driveway. This rock should be about the size of a ping-pong ball. Level it and compact it, as well. Apply a final 4-inch layer of small, crushed rock, known as crusher run gravel.

 

Things You Will Need

  • Shovel
  • Heavy-duty landscaping fabric
  • Crushed, baseball-sized stone, or #3 stone
  • Rake
  • Mechanical roller
  • Crushed ping-pong ball-sized stone, or #57 stone
  • Small gravel, or crusher run gravel

Tips

  • Check local zoning requirements for specific information for your area. Some communities require driveways with a positive slope of 10 percent or greater to be paved from the road to a distance of 60 feet from it.
  • Gravel will erode quickly on a sloped driveway. Rake the gravel occasionally to repair bare spots, and add more gravel when bare spots become numerous.

About the Author

 

Julie Christensen is a food writer, caterer, and mom-chef. She's the creator of MarmaladeMom.org, dedicated to family fun and delicious food, and released a book titled "More Than Pot Roast: Fast, Fresh Slow Cooker Recipes."