A bocce court fails from underneath

Quick answer: Dig 8 to 9 inches down. Lay landscape fabric, then 6 inches of compacted crushed stone, then 2 inches of stone screenings for the playing surface. Frame it with ground-contact treated timbers pinned down with rebar. If water can leave, the court survives winter. If it can't, nothing you build on top will matter.

Winter doesn't kill courts. Water does.

Cold alone doesn't hurt a bocce court. Wet soil does. It soaks up water, freezes, swells, thaws and settles unevenly. Do that ten times between December and March and your flat, fast court turns into a rolling pasture with a ridge down one side.

Most guides spend their words on the surface: which dust, which shell, how to rake it. That's the last two inches of the project. The other 90 percent is the hole.

So build the hole properly. Then the surface is easy.

Pick the spot and the size

Choose the driest ground you own. Not the corner where the lawn stays green in August, because that's the corner holding water. Stand there after a hard rain and look for puddles. If you find one, move over.

For size, 8 feet by 40 feet is a good first court. It's long enough for a real game, small enough to dig in a weekend, and it fits most side yards. If you've got the room, 10 by 60 is a common backyard size and plays better. Go narrower than 8 feet and the balls bounce off the boards more than they roll.

Keep it at least a few feet from the house foundation, and slope the ground so runoff heads away from the court and away from your neighbor's yard. Call 811 before you dig. It's free, and it beats finding the gas line with a shovel.

Dig it, and plan for the dirt

For an 8 by 40 court, dig 8 to 9 inches. That works out to about 8 cubic yards of dirt, close to forty wheelbarrow loads. Decide where it goes before you start. A low spot in the yard, a garden bed, or a neighbor who's been asking for fill.

Here's the part nobody mentions. Pitch the bottom of the hole, not the top of the court. Slope the dirt floor about 1/8 inch per foot toward a low corner or a side where water can run off. The stone base follows it, and the playing surface stays close to level. A court that visibly leans plays like a bad putting green.

If your soil is heavy clay, add a drainage option at the low end. A shallow trench filled with stone that runs out to daylight, or to a dry well, gives the water somewhere to go. Sandy soil that drains by itself can skip it.

Then tamp the dirt floor flat and firm. Walking on it isn't enough. Rent a plate compactor.

Lay the base like you mean it

Roll out landscape fabric over the dirt, overlapping seams by a foot. It keeps the clay from working up into your stone over the years.

Then the stone. Ask your local stone yard for crushed stone with fines in it, often sold as "3/4-inch minus" or crushed limestone. The sharp edges lock together when compacted. Rounded pea gravel doesn't, and it shifts under you like a beach.

Spread it in two lifts of 3 inches, not one deep pile. Compact each lift with the plate compactor, going over it in both directions. One thick layer only gets packed on top. You'll need roughly 8 tons of base for an 8 by 40 court. Have the yard confirm the number, because stone weight varies.

Check for level with a long straight board and a level. Fix low spots with stone now. Fixing them later means digging up your court.

One more thing about that compactor. Return it cleaner than you got it, with a full tank of gas. The rental guy will remember, and the next time you need something he'll find it for you.

The surface: two inches, and no more

Spread about 2 inches of stone screenings (limestone dust, sometimes sold as "screenings" or "chat") over the base. That's about 3 tons for this court. Rake it level, mist it with a hose until it's damp but not soupy, and compact it again. Do it in two thin passes if you can.

Damp is the trick. Dry dust won't pack and soaked dust turns to paste. It should hold a thumbprint without sticking to your hand.

If you want the traditional look and live where it's affordable, a top dressing of crushed oyster shell over the screenings is the classic surface. It's brighter, and it rolls a touch quicker. Screenings alone play fine and cost less. Start there. You can always add shell later.

Borders that stay put

Use 4x6 or 6x6 timbers rated for ground contact, set on the stone base so the bottom is below the finished surface and the top stands 6 to 8 inches above it. Lower than that and balls hop out. Pin each timber with 2-foot lengths of rebar driven through pre-drilled holes, every 4 feet or so.

Frost heave tries to lift anything that's sitting in wet soil. A timber sitting on drained stone and pinned with rebar has far less to grab onto. Stake the corners twice.

Leave the inside face smooth. Bocce players bank shots off the wall, and a rough board makes the game unfair.

Winter, and the first spring

Don't seal it under a tarp. A tight tarp traps moisture against the surface and sets you up for the exact freeze-thaw cycle you built the court to avoid. If you want to cover it, use something breathable, or just leave it open and keep the leaves off.

Skip the salt. It draws moisture and chews up the surface. If snow piles on, clear it with a plastic shovel and stop an inch above the surface. A metal blade will gouge it.

In April, expect some work. A court built this way still moves a little. Rake it level, mist it and run a water-filled lawn roller over it, or go over it again with the compactor if you borrowed one. It's an hour, not a weekend. That hour is what keeps the court fast for years.

Before you pour the first drink

Build it with someone. A son or a father-in-law moves stone faster than you'll want to admit, and a court you dug together gets played. If you want help getting a group together after, start the weekly game yourself, because nobody else will. And if the person you want out there's your dad, a three-hour game is the easiest way back to him there is.

If you're the type who likes a project with a finished object at the end, the case for sawdust on the floor applies to gravel dust too.

Expect to spend two weekends and a sore back. Then you'll own a court the neighbors drift over to watch, and in ten years it'll still be flat.