Walkway Gravel: Paths Laid Between the Thaw and the Freeze

A path is one of the few yard jobs where the weather decides the schedule rather than the budget. Spread this material while the ground under it is still coming out of frost and the surface settles unevenly for the rest of the year. Wait until the subgrade has drained, and the same load compacts into something that stays flat. In most of the state that means late spring through to the first hard freeze, and further north, in the Northwoods and along the Lake Superior shore, the opening comes later and closes sooner.

Reading the 3/8 inch spec before you order a path surface

The listing gives three things, and each one changes how the path behaves.

• Size: 3/8 inch. Small enough to walk on comfortably, large enough not to track indoors the way a dust-fine material does.
• Grading: a graded mix of stone sizes. The smaller pieces settle into the gaps between the larger ones, so the surface knits rather than shifting underfoot.
• Type: crushed stone. Broken faces lock against each other. That is the difference between a path that holds its shape and one that scatters into the grass.

What the spec does not say is that it is a surfacing material. It finishes the top of a build. It is not the part that carries weight.

A use-by-use table: where it finishes the job and where it only tops it

The bottom two rows are worth reading twice. At 3/8 inch this material makes a tidy surface, but a pad or a drive needs a load-bearing layer beneath it or the surface goes to ruts in the first wet spell.

Paths over Driftless silt, Northwoods till and lake-country sand

• Silt loam on the Driftless ridges and coulees holds water and softens as frost leaves. Paths on a grade there need a cross fall and something solid at the downhill edge.
• Northwoods till runs stony and sandy on the rises and turns to peat and muck in the hollows. Route a path around the hollows rather than filling them.
• Central Sands outwash drains almost as fast as you can pour water on it, so the problem is not drainage but the sand working its way up into the gravel. A separation layer fixes that.
• Red clay on the Lake Superior plain and the lake clays around Green Bay and Lake Winnebago stay wet. Expect a path there to need a compacted layer below the surfacing.
• Frost heave is the constant. A path is allowed to move a little; what it must not do is trap water where it can sit and freeze under a stepping stone.

Working the numbers for a fire pit ring, a pole barn pad and a short drive

Square feet times depth in inches divided by 12 gives cubic feet. Divide by 27 for cubic yards. The site publishes roughly 2,800 lb per cubic yard for driveway and walkway gravel, or 1.40 tons per yard, so yards times 1.4 gives tons. Hypothetical examples:

• Fire pit surround, a ring 16 ft across with a 5 ft pit in the middle, at 3 inches. Area = 3.14 x (8 x 8) minus 3.14 x (2.5 x 2.5) = 201 minus 20 = 181 sq ft. 181 x 0.25 = 45.3 cubic feet. Divided by 27 = 1.7 cubic yards, or about 2.4 tons.
• Pole barn pad top dressing, 30 ft by 40 ft at 2 inches: 1,200 sq ft x 0.167 = 200 cubic feet. Divided by 27 = 7.4 cubic yards, or about 10.4 tons.
• Single-car drive surfacing, 10 ft by 70 ft at 2 inches: 700 sq ft x 0.167 = 117 cubic feet. Divided by 27 = 4.3 cubic yards, or about 6.0 tons.

Those depths are for the surfacing only. The base under the last two is a separate order. Put the numbers through the Gravel Calculator if you want them checked.

What to have sorted before the truck turns in

• Pick the drop before delivery day, on firm ground, close to the work and clear of soft lawn and low branches.
• Delivery is arranged at checkout by ZIP code, so have the address and the access details straight when you order.
• Have the edging in before the stone arrives. Loose 3/8 inch material without an edge migrates into the lawn.
• Keep the pile off anything you care about. A tipped load leaves a mark, and fine gravel works itself into turf.
• Have the wheelbarrow, rake and plate compactor lined up before the load lands. Spreading while the material is loose and slightly damp is much easier than breaking up a pile that has sat through a week of rain.

Set the quantity and the delivery date on this page, or send the measurements through the contact form if you want a second pair of eyes on them first.