Bulk Gravel Delivery to San Mateo, CA

California Rock Supply handles gravel and aggregate delivery in San Mateo, CA for two kinds of buyers: contractors running paver and flatwork crews, and homeowners rebuilding a patio or drive. Both usually start with Class 2 base, the standard California base material. Soils here change fast, from sandy ground near the shoreline to heavy clay in the hills, so the base under your flatwork has to suit the lot in front of you.

Ground and Conditions in San Mateo

A thin base shows itself the same way every time: pavers rock underfoot, joints open, and slab edges settle after a wet winter. Heavy clay soils that crack when dry and swell when wet are extensive in the Coast Range valleys and hills, and that movement travels straight up through anything laid on too little base.

The fix is a thicker compacted layer of Class 2 base, placed in lifts and compacted before the bedding sand or paver joints go in. Most rain falls from late fall to spring, much of it in a few large winter storms and atmospheric rivers. Water soaks into sandy ground quickly but sits on or runs off clay soils and slopes, so drainage matters as much as depth.

Hillside runoff and slides on steep slopes are a winter concern, and saturated clay is what holds jobs up. The dry season from late spring into fall is the main window for base, driveway and paver work. Summer fog near the shore is normal and does not stop a pour.

Materials for San Mateo Projects

Under pavers and flatwork, the bedding layer is where most projects are won or lost. A paver patio needs a compacted Class 2 base below and a thin, even bedding layer above it, and the two jobs call for different materials.

Class 2 Base, also called Class II base rock or base rock, is the standard base material for driveways, parking pads, and the compacted base under pavers, slabs and Stone Screenings paths. Caltrans specifies it as Class 2 aggregate base. Recycled base rock, made from Road Base or asphalt, does the same job under drives, patios and slabs, and Caltrans allows processed reclaimed asphalt and concrete in aggregate base.

For the bedding layer, Mason Sand is the usual choice under pavers and in paver joints, and for brick and block work. Washed Sand, also called concrete sand, handles leveling and bedding under slabs. Washed Sand is a coarser sand and fine gravel blend for leveling and bedding where you want more bite.

Where the surface is exposed rather than covered, Driveway Gravel tops a compacted Class 2 base on an existing drive. Stone Screenings, or DG, is a fine, firm-packing material for paths and patios laid over a compacted base. Walkway Gravel gives walkways and garden paths a finer, walkable surface.

Drainage is the other half of a patio job. Drain Rock goes into French drains, drywells and downspout runs, and 3/4" Drain Rock is clean stone with no fines, so water moves through it. RipRap, which Caltrans calls rock slope protection, armors slopes and culvert outlets against winter runoff.

Delivery to San Mateo and the Surrounding Area

Order online and pick your quantity by the ton or by the yard, whichever way you priced the job. If you are not sure how the two line up for your area and depth, the calculator sizes the load for you before you check out.

Then choose a delivery date at checkout and a dump truck brings the material to your site. Bulk loads go to driveways, side yards, and open pads where the truck can reach and dump safely, so it helps to know where you want the pile dropped before the truck arrives.

California Rock Supply delivers across San Mateo County, including Daly City, Redwood City, South San Francisco, San Bruno and Pacifica.

Questions San Mateo Buyers Ask

What gravel is best for a driveway in San Mateo?

Start with Class 2 base. It is the standard California base material, specified by Caltrans as Class 2 aggregate base, and it compacts into a stable layer that carries a drive. Top it with Driveway Gravel if you want an exposed surface. On clay ground, build the base thicker and make sure water has somewhere to go.

How much material will my project need?

It depends on the area you are covering and the depth you need, and the two are multiplied together. Use the calculator on the site to turn your measurements into tons or yards, then order that figure. If your ground is heavy clay, plan for more base depth than a sandy lot would need.

Size Your Load, Then Place Your Order

Work out your square footage and depth, run it through the calculator, and order the tonnage or yardage it gives you. Class 2 base, bedding sand and drainage stone all ship together. When your numbers are ready, place your order online and pick a delivery date that fits your schedule.