3/8 Clean for Patios in Cathlamet, WA

Washington Rock Supply handles gravel and aggregate delivery in Cathlamet, WA, from 5/8 minus for drives and pads to washed stone for bedding and drainage. Orders go in online and a dump truck tips the load on your site.

This part of Wahkiakum County sits on river terrace silt and gravel, ground that holds water instead of shedding it. That shapes what you put under a patio as much as what you put on top of it.

Ground and Conditions in Cathlamet

Across the Lower Columbia, Chehalis valley and the Willapa Hills, the fine-grained terrace and hill soils hold water rather than shedding it. Winter storms back the rivers up, and pads and drives sit wet longer than the calendar suggests.

A thin base shows that first. Flatwork laid on too little stone rocks and settles, and the joints open as the ground moves under it.

The fix is a free-draining course under the bedding, so water leaves instead of sitting in the fines. A minus product compacts and holds, while a clean or washed stone keeps its voids and lets water pass.

The working season runs October to April on the same wet-weather rule as the rest of western Washington, with two days the limit on exposed unworked soil. Grading in the river valleys is planned around the winter flood season as much as around the rain.

Winters here are mild and wet, with only shallow frost. Ground that softens in Cathlamet softens because it is full of water, not because it froze and thawed.

Materials for Cathlamet Projects

Bedding under pavers and flatwork is where the material choice shows. The setting bed and the joint stone decide whether a patio stays flat or works loose in the first wet season.

Stone Screenings, also called crusher dust or 3/8 minus, is the standard bedding for pavers and flagstone. It is a minus product, so it compacts rather than drains, which is what a setting bed needs.

3/8" Crushed Stone is the washed, fines-free counterpart. It goes in permeable paver joints and small drain runs where you want water to move instead of the stone locking up tight.

Walkway Gravel, or 1/4 minus, is the fine end of the minus range and packs down tight underfoot. It suits garden paths, side yards and firm walking surfaces around a patio.

5/8 Minus is the Washington default surfacing course and the local name for crushed surfacing top course, or CSTC. The fines stay in, so it packs hard and sheds water instead of soaking it up, which makes it the surface for driveways, parking pads and shed or shop slabs.

Under that surface, 1 1/4 Minus is the structural course, also called crushed surfacing base course or CSBC. It has a larger top size and fewer fines, so it carries load and stays workable on soft wet ground.

Drain Rock, also called 7/8 clean or washed rock, has no fines, so it keeps its voids where water perches on the ground. It suits footing drains, French drains and infiltration trenches.

Washed Sand goes into concrete mixes, paver setting beds and pipe bedding. It is washed to take the silt out, which matters on a site working through the wet season.

Delivery to Cathlamet and the Surrounding Area

Quantities are ordered by the ton or by the yard, whichever suits how you planned the job. Each product page has a calculator, so you can size the load before you check out.

Pick a delivery date at checkout and a dump truck tips the load in one pile on your site. The driver does not spread or place it, so plan where that pile should sit before the truck arrives.

Washington Rock Supply delivers across Wahkiakum County, including Rosburg, Grays River and Skamokawa. If your site is out past the valley floor, order the material you need in the quantity you need it.

Order Bedding and Base Material for Cathlamet

Size your load with the calculator on the product page, then order by the ton or the yard and pick a delivery date. Washington Rock Supply delivers bulk gravel, stone, sand and soil across Cathlamet and Wahkiakum County.