Fill and Base Material Delivered in Cortland, IL

Illinois Rock Supply handles gravel and aggregate delivery in Cortland, IL, and the material this market builds on is CA-6, also called road base or 3/4 dense grade. It is dense graded crushed limestone with the fines left in.

CA-6 goes under driveways, parking pads, shed and garage bases and trench backfill. Cortland sits in DeKalb County on the Northern Illinois till plains, where loamy prairie soils over dolomite make a compacted base course worth planning for.

Delivery to Cortland and the Surrounding Area

You order online, pick the material, and set the quantity by the ton or by the yard. Each product page has a calculator if you want to size the load before checkout.

Choose your delivery date at checkout and a dump truck tips the load on your site in Cortland. The truck tips it in one pile.

Illinois Rock Supply delivers across DeKalb County, including DeKalb, Sycamore, Sandwich, Genoa and Hinckley. If your project sits in Cortland or just outside it, choose the delivery date at checkout and the truck arrives with your material.

Materials for Cortland Projects

Raising grade and building pads start with fill, then a compacted base. That order matters on flat ground where water has nowhere to go.

For a building pad or a low spot, start with Fill Dirt to raise the grade before anything goes on top. Fill dirt is bulk fill for bringing a site up to level.

Then cap it with CA-6, the dense graded crushed limestone that carries the fines. CA-6 is the base course for driveways, parking pads and garage floors.

For a driveway surface, Driveway Gravel tops a compacted base or resurfaces an existing drive.

Clean stone has no fines, so it drains. Use CA-7 for bedding under pipe, drainage trenches, French drains and concrete flatwork.

For a patio or walkway, Lime Screenings bed pavers and flagstone. Walkway Gravel gives a finer, walkable path surface.

Ground and Conditions in Cortland

Across the Northern Illinois till plains, the ground runs to tight till with a high water table on the flat ground. Loamy prairie soils sit over dolomite.

That combination punishes an under-built base. Water that cannot drain away sits in the subgrade and works on whatever you put above it.

Spring rain and snowmelt on frozen ground push water across the surface. A base course over soft, saturated subgrade will not hold.

The working season here runs from the spring thaw into late fall and is a little shorter than downstate. Frozen ground stops compaction in the winter.

This part of the state sees repeated freeze and thaw and heavy frost action in unbound base and shallow footings. Frost depth is set by the local building department, about 42 inches across the northern counties, so plan footing depth with the county, not with a rule of thumb.

Order CA-6 and Base Material for Cortland

CA-6 is the base course that carries driveways, pads and shed floors in Cortland, and it is the material to start with when you raise grade. Add fill dirt below it and clean stone where water has to move.

Order online when you are ready and set your delivery date at checkout.