To build a gravel driveway, lay out the route, strip the topsoil, firm up the subgrade, add fabric where the soil is soft, then build a compacted base of larger crushed stone and finish with smaller surface stone shaped into a crown. The drainage on both sides decides how long it lasts.
Step one: plan the route and the entrance
Walk the route before anything is dug. Stay on higher ground where you can and avoid low spots that hold water. Make it wide enough for the vehicles that will use it, including delivery trucks, and plan a turnaround so nobody backs out onto the road.
Where the drive meets the road, the office that maintains that road decides on the entrance. That may be the township, the county or the state. Ask them about the entrance and any culvert before you start. Our gravel driveway cost guide covers culverts and permits in more detail.
Before digging, call JULIE at 811 so buried utility lines are marked.
Step two: strip the topsoil
Topsoil is great for grass and poor for carrying weight. It is soft, full of organic matter and holds water. Rock laid on top of it sinks in, mixes with it and turns to mud in the first wet spring.
So the topsoil comes off along the whole route and a little past the edges. Stockpile it nearby rather than hauling it away. You will want it later to dress the shoulders and seed the ditches.
Skipping this step is a common reason a new gravel drive goes soft. It also explains why some drives seem to swallow a load of rock every year.
Step three: shape and firm the subgrade
With the topsoil off, the ground underneath is the real foundation of the drive. Shape it so it already has the crown and slope the finished drive will have. Water should leave the subgrade the same way it will leave the surface.
Then compact it. A roller packs the soil, and a loaded truck driven slowly over it shows where it is still soft. Soft spots get dug out and filled with better material instead of being covered over.
A firm subgrade is what lets the stone above it do its job. Rock on top of a soft spot will rut and pothole no matter how much you add.
Step four: fabric where the ground is soft
A woven geotextile fabric laid over the subgrade separates the stone from the soil. On heavy, wet clay, it keeps the base rock from being pushed down into the mud over time.
Not every drive needs it. On firm, well-drained ground, a good base can go straight onto the compacted subgrade. On soft ground, low stretches or spots that stay wet, fabric is a small extra that protects the stone you paid for.
Lay it flat, overlap the seams, and keep traffic off it until stone covers it. Running a truck on bare fabric can tear it and defeat the purpose.
Step five: base stone, then surface stone
The base is the backbone of the drive. It is crushed stone with a mix of sizes and fines, so it locks together when it is packed. Spread it in layers, not one deep dump, and compact each layer before the next goes on.
How thick the base should be depends on the soil and the traffic. A drive for a car on firm ground needs less than one carrying grain trucks over clay. Ask the quarry or your contractor what suits your ground.
The surface layer is a smaller crushed stone that packs into a smooth driving surface. Angular crushed stone locks together. Round gravel rolls under tires and drifts, so it is a poor choice for the driving surface.
Step six: crown and ditches
A finished drive should be higher in the middle than at the edges. That crown sheds rain to both sides instead of letting it run down the wheel tracks. Water running down the middle is what carves ruts and washes stone away.
Water shed off the drive needs somewhere to go. Shallow ditches or swales along the sides carry it away. Where water has to cross under the drive, a culvert sized for the flow goes in.
Seed the ditches and shoulders with the stockpiled topsoil so they hold. Then keep the crown as the years go by. Our gravel driveway repair guide explains how to restore it when it flattens out.
Who builds a gravel driveway
Gravel drives are usually built by an excavating or dirt work contractor, because most of the job is earthwork and drainage. The rock is the easy part.
We build new gravel drives from layout to finished crown, including the culvert where the drive crosses the road ditch. We also rebuild old drives that lost their base. See our gravel driveway installation and repair page, or driveway installation in Ottawa.
Call James at (815) 240-9065 or send the route, a few photos and what will drive on it through the contact form.
The Short Version
- Strip the topsoil first; rock laid on topsoil sinks and turns to mud.
- A shaped, compacted subgrade is the real foundation of the drive.
- Use fabric on soft or wet clay to keep stone out of the soil.
- Build the base in packed layers of crushed stone, then add a smaller surface stone.
- A crown and side ditches keep water off the drive and stop ruts.
Quick Answers
How thick should a gravel driveway be?
It depends on the soil underneath and what drives on it. Soft clay and heavy trucks call for a deeper base than firm ground and cars. Base stone goes on in packed layers, with a thinner surface layer on top.
Do I need fabric under a gravel driveway?
On soft, wet or clay ground it helps a lot, because it keeps the base stone from sinking into the soil. On firm, well-drained ground, a good compacted base can often go straight on the subgrade.
Can I put gravel right on top of grass?
It is a common shortcut, and it rarely holds up. The grass and topsoil rot and soften under the rock, and the stone sinks in. Stripping the topsoil first is what makes a gravel drive last.
What is the right kind of gravel for a driveway base?
Crushed stone with a mix of sizes and fines, which packs tight. Quarries name their products differently, so tell the quarry it is for a driveway base and ask what they recommend for your soil.
See our driveway & dirt work service or call (815) 240-9065.