Woven Stabilization Fabric

So you've decided to build a gravel driveway in place of the one you have now. It takes some work and time, but the result can be a pleasant surprise — just follow the necessary steps and line up all the materials you'll need first.

You'll want geotextile road fabric — also called driveway fabric — to create a supportive base layer for a more stable surface that resists ruts and potholes.

Preparing The Surface For Your Driveway

Before anything else, prep the surface by removing debris such as rocks and stumps that could tear the fabric. Then level the surface without creating a trench that will hold water — if you have an area that holds water, use a pipe or drain to carry it away.

Place the fabric directly on the prepared surface, rolling it out flat and keeping creases and folds down. Where needed, overlap the fabric by 1 to 3 inches and use pins or staples to hold it in place; you can also use dirt or other heavy material to anchor it before the rock goes on.

Place the gravel and compact it in 6- to 8-inch lifts. A dump truck or loader can be driven over the fabric without damaging it — just avoid quick stops or turns. The best approach is to dump the stone onto the fabric and then push it out, which protects the fabric underneath. Aim to create a slight crown so water drains to the sides of the driveway.

What Kind Of Rocks Should Be Used?

The rock should be crushed and angular, about one inch in diameter, with no more than 10% dust. Limestone is a good choice, though other stone will work if you prefer.

A good option is Dense Grade Aggregate (DGA), also called crusher run. The advantage of building over fabric is that you won't need stone larger than one inch — just be sure to avoid round stones, which won't lock together.

Mistakes To Avoid When Building A Gravel Driveway

If the extra maintenance of a gravel driveway isn't a problem for you, it costs a great deal less than a paved driveway and can last just as long. If this is your first time, here are the mistakes to avoid:

Stay Away From Soft, Spongy Ground

Don't spread gravel over soft ground. Soil loaded with leaves, grass, roots, weeds, or other debris makes a spongy surface that leads to problems down the road. Strip the topsoil and get down to firm ground — it creates a more stable, dependable bed (and you can reuse the topsoil elsewhere).

Poor Drainage

If the driveway isn't correctly leveled, drainage becomes an issue. An unleveled driveway lets water erode and damage the surface — you end up with a mud hole as silt from below works up into the gravel, loosening it, killing the friction, and causing weakening and separation.

Prevent The Gravel From Moving

To keep gravel from migrating, a gravel-paver product can be used to prevent rutting and provide a very stable surface. Gravel pavers come in many shapes and sizes in either plastic or heavy-duty geotextile. Another good option is adding sides to the driveway — wood, or a retaining wall of brick or concrete block — to keep material from spreading beyond the driveway's edges.

Avoid The Wrong Size And Shape Of Gravel

The base layer of gravel should be at least 3 to 4 inches in diameter, or you'll get shifting and sinking when you drive over it. Fragments must be angular with sharp edges; rounded rock can't lock into place. Sharp-edged fragments together are as solid as a single large rock. Top-layer gravel shouldn't be larger than a golf ball, and the total thickness of the driveway, across the different gravel sizes, should be around 12 inches.

Compact Each Layer Properly

The driveway is built from several layers of gravel, and each one must be compacted properly or the surface won't keep its shape. Keep each layer around 4 inches thick, with fragments smaller than the layer below, and tamp each one down with a hand-operated machine or roller.