1/4 Minus Delivery for Duvall, WA

If you are building a pad or raising grade on a Duvall lot, you need fill and sub-base that will hold up under a wet Puget Sound lowland winter.

Washington Rock Supply sells gravel and aggregate delivery in Duvall, WA by the ton, including 5/8 minus, the crushed surfacing top course this market uses as its default surfacing rock.

Order online, pick your quantity, and a dump truck tips the load on site.

Delivery to Duvall and the Surrounding Area

Everything is ordered online. You choose your material, set the quantity by the ton or by the yard, and pick a delivery date at checkout.

Each product page has a calculator if you want to size the load before you commit.

A dump truck arrives and tips the material in one pile. Where that pile lands is up to you, so plan your access before the truck shows up.

Washington Rock Supply delivers bulk material across King County, including Seattle, Bellevue, Kent, Renton and Federal Way.

Materials for Duvall Projects

Fill and sub-base do the heavy lifting on most Duvall jobs. The order usually splits into a structural layer below and a surfacing layer on top.

Raising Grade and Building Pads

Fill Dirt, also called common borrow, is the material for raising grade, backfilling over-excavations and building up low spots before a granular course goes down. It is the base of the build, not the finish.

Above that goes a structural course. 1 1/4 Minus, or crushed surfacing base course, carries load and stays workable on soft wet ground because it has a larger top size and fewer fines than the surfacing rock.

Then the top course: 5/8 Minus, also called crushed surfacing top course or CSTC. It is crushed rock with the fines left in, so it packs hard and sheds water instead of soaking it up.

That is what makes it the default for driveways, parking pads, shed slabs and shop slabs here.

What to Order by Project

• Driveway: 1 1/4 minus as the base course, then 5/8 minus on top.
• Patio or paver bed: crusher dust for the setting bed, with 3/8 clean in the joints.
• Drain or French drain: drain rock, a washed 7/8 clean stone that keeps its voids.
• Path or side yard: Walkway Gravel, a 1/4 minus that packs down tight underfoot.
• Soft ground or a wet corner: 1 1/4 minus below, so the base carries the load.

Drainage and Bedding Stone

Where water needs to move, the fines have to come out. Drain Rock, sold as 7/8 clean or washed rock, goes in footing drains, French drains and infiltration trenches.

3/4" Crushed Stone is the washed counterpart for trench backfill, pipe surround and under-slab drainage.

Stone Screenings, also called crusher dust or 3/8 minus, is a minus product, so it compacts rather than drains. It is the bedding and joint material for pavers and flagstone.

Ground and Conditions in Duvall

Duvall sits on Puget Sound lowland ground, and that ground sets your base. Across the region, glacial ice left a dense till cap over sand and, deeper down, silt and clay.

Water that soaks through the loose upper soil reaches the till and stops.

That perched water sits close to the surface all winter instead of draining away. A base built without accounting for it will soften from below, no matter how well the top course was placed.

The practical answer is to take the water sideways to daylight. Footing drains and washed drain rock do much of that work, which is why a clean stone belongs in the ground under a Duvall build and not just around the perimeter.

The wet season runs October through April. In that window, exposed soil has to be stabilized within two days under the state stormwater manual for western Washington, against seven days in summer.

Base, paving and paver work is best scheduled for the dry months. Winter work needs the grade kept covered.

Mild wet winters mean saturation is what softens a base here rather than frost, and a drive that was firm in August can rut in February.

Order 5/8 Minus for Your Duvall Job

For driveways, parking pads and shop slabs in Duvall, 5/8 minus is the surfacing course that packs hard and sheds water. Pair it with 1 1/4 minus below and fill dirt where the grade needs lifting.

Washington Rock Supply delivers bulk gravel, stone, sand and soil across King County. Choose your material and quantity online and place your order.