Buying Bulk Aggregate in Texas, Question by Question

Most people arrive here with the same job. A drive or a ranch road has rutted out after a week of rain, the ground under it is clay that has been moving all year, and the question is what to put down and how much of it. The answers below run in the order the decisions actually come: material first, then tonnage, then the order and the truck, then what happens once the pile is on the ground.

Black gumbo, caliche or sand: what the ground decides for you

Does the soil under the job change what I should order?

More than anything else does. Expansive clay across the Blackland Prairie and much of north and central Texas shrinks and swells with the season, so a thin base cracks and a shallow trench holds water instead of shedding it. On that ground, depth and drainage carry the job. The Hill Country gives you limestone close to the surface and thin soil over it, so there is less to dig out but also less forgiveness in the grade. Gulf Coast and Piney Woods ground holds moisture, which pushes the answer toward more open stone and better fall. Freeze-thaw is not the failure mode here, whatever a national guide tells you; water and clay movement are.

Which stone drains, and which stone makes a base?

Base materials are graded from large pieces down to fines, so everything interlocks and the layer stiffens under a roller. Flex Base at one inch minus and crusher run at three-quarter inch minus are both in that family. Drainage materials are the opposite: single-sized and washed, so the voids between pieces stay open and water can travel. #57 Limestone, #67 Stone and drain rock do that work. Putting a base material in a French drain gives you a plug, and putting clean stone under a pad gives you a layer that never sets up.

The fines are the whole distinction. They are the dust and small particles that fill the gaps between larger pieces, so material with fines compacts, sheds water off the surface and holds a shape, while washed material has had them taken out and lets water pass straight through. Shed the water, or carry it. On the specification side, base material is written up locally as flexible base under TxDOT Item 247, by type and grade, with Grade 1 and Grade 2 the common commercial grades. That is how the material is described in this state, not a certification held here, so a job built to a drawing gets its specification matched against the size and grading on the product listing.

Are topsoil, garden soil and fill dirt interchangeable?

No, and this is the most expensive mix-up on the list. Screened topsoil is a balanced sand, silt and clay mix for lawns, sod and bed prep. Garden soil is enriched with compost for raised planters and vegetable beds, where you want organic matter. Fill dirt has minimal organic content on purpose, because it is for building ground up and compacting, and organic material in a fill layer keeps settling for years. Fill the hole with fill dirt, cap the top few inches with screened topsoil, and plant into that.

Flex base thickness, and why a Texas drive wants more of it

How deep should a base be for a car compared with a loaded truck?

Depth follows the heaviest thing that will cross it, not the average. A car turnaround and a loaded truck route are different builds, and on clay the difference widens, because a thin layer over ground that moves will telegraph every soft spot. Work to a finished compacted depth rather than a loose one, and where trailers, feed trucks or equipment will use the route, build the base section deeper and the drainage fall steeper. Each product page lists the depths that suit the job it is meant for.

Fabric, slopes and the week after the pile lands

Does landscape fabric belong under the material?

It depends what the layer is for. Under a decorative bed, a path or a dry creek, fabric keeps rounded stone from working down into clay and keeps weeds from coming up through it, which is worth the effort. Under rip rap on a bank, fabric is standard practice, because it stops the soil washing out from between the stones. Under a compacted base carrying traffic, it is usually left out, since the layer is meant to lock into the prepared subgrade rather than float on it. Fabric is not a product on this site, so source it locally if the job calls for it.

How do I keep gravel from moving down a slope?

Three things: edging, size and water. Hold the edges with something solid so the material has a lip to sit behind. Use angular stone rather than rounded, because crushed faces lock together and pea gravel rolls. Then deal with the water, because on a slope it is runoff rather than footfall that empties a path. Flash runoff after a high-intensity storm is what moves material here, so give the water a route across or around the slope, and on a bank that is actively cutting back, step up to heavier stone rather than adding more of the light stuff.

Is leftover material worth keeping?

Usually yes, if it is stone or gravel, which will keep indefinitely on a tarp or a spare corner of hard standing and is worth having for the first ruts and washouts after a storm. Soil and mulch are different, since both degrade and compact in a pile, so plan to use them within the season. If you are short rather than over, place a second order or ask through the contact form rather than stretching the layer thin, because a base built under depth fails at the thinnest point first.

Two things this page no longer answers are answered better a click away. Ton against yard, how much a layer loses under a roller, and what a cubic yard of each product weighs are all in the material calculator. What the truck needs to reach a ranch entrance, what should be ready before it arrives, and what checkout settles are in the delivery access notes.

How does clay under a driveway change the base I should order?