3/8 Clean for Patios in Mountlake Terrace, WA

Order gravel and aggregate delivery in Mountlake Terrace, WA, by the ton or the yard. Washington Rock Supply sells bulk 5/8 minus, washed stone, sand and soil online, then sends a dump truck to your site.

Ground here is glacial till capped over sand. Water perches on the dense layer below and sits through the wet months, so what you put under a paver patio matters as much as the pavers.

Ground and Conditions in Mountlake Terrace

Across the Puget Sound lowland, the ground is glacial till with a dense lower zone crews call hardpan. Rain soaks the loose upper soil, hits that layer and stops.

The perched water table then sits close to the surface all winter. Water has to move sideways to daylight, or it works its way up under anything you build.

A thin bedding course over a soft, saturated subgrade shows the problem fast. The surface rocks, joints open, and pavers settle unevenly by spring.

The fix is a base that carries load and a drainage path that keeps water off it. That means a compacting minus course below and washed stone where water needs to move.

The wet season runs October through April. Exposed soil in western Washington has to be stabilized within two days in that window, against seven days in summer.

Schedule base, paving and paver work for the dry months. Winter work means keeping the grade covered between stages.

Winters here are mild and wet, so the ground seldom freezes deep. Saturation, not frost, is what softens a base, and a patio that was firm in August can shift by February.

Materials for Mountlake Terrace Projects

Bedding is where a paver patio is won. The layer under the pavers sets the surface, and the layer under that keeps it there.

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

Sweep the same material into the joints after setting.

Below the bedding, build the structural course from 1 1/4 Minus, the crushed surfacing base course, or CSBC. Larger top size and fewer fines than 5/8 minus, so it carries load and stays workable on soft wet ground.

Where a washed, fines-free stone is wanted instead, use 3/8" Crushed Stone. It drains instead of compacting, so it suits permeable paver joints and small drain runs.

For the top course on a driveway or parking pad, 5/8 Minus is the Washington default, also called crushed surfacing top course, or CSTC. The fines stay in, so it packs hard and sheds water instead of soaking it up.

Take water sideways with Drain Rock, also called 7/8 clean. It is washed with no fines, so it keeps its voids where perched water sits on till.

Use it in footing drains, French drains and infiltration trenches.

Delivery to Mountlake Terrace and the Surrounding Area

Order online and choose your quantity by the ton or by the yard. Each product page has a calculator to size the load.

Pick a delivery date at checkout. A dump truck tips the load in one pile on site, and that is the whole of it.

Mountlake Terrace sits in Snohomish County, and delivery covers the county. That includes Everett, Marysville, Edmonds, Lynnwood and Lake Stevens.

Order Your Patio Materials Online

Work out your quantity on the product page calculator, then place the order and pick a delivery date. Washington Rock Supply tips bulk 5/8 minus, crusher dust, drain rock and washed stone at your Mountlake Terrace site.

Start with the material you need and order it online.