2A Modified and Bulk Aggregates for Allentown, PA

Rain and snowmelt come off the steep ridge slopes and run into the valleys around Allentown. That runoff finds every low spot, every wet drive and every soggy yard. Pennsylvania Rock Supply delivers gravel and aggregate in Allentown, PA, and drainage stone is the place to start. 2A modified handles the base. Clean washed stone handles the water.

Materials for Allentown Projects

Water is the first problem here, so start with stone that lets it move. Clean stone has no fines, so water passes straight through instead of pooling. Use it in French drains, drywells and downspout runs. Then build the base on top with 2A modified.

Coarsest to finest, here is what each size does on an Allentown job.

2B stone is the workhorse for drainage. Pennsylvania yards also call it 2B clean stone or 3/4 inch clean stone. Buyers who ask for #57 Stone want the same clean stone under a different number.

For tighter work, #67 Stone is a slightly smaller clean stone for drainage and concrete. #8 Crushed Stone, sold locally as 1B, is the half inch and down chip for walkways and decorative topping.

2A modified is the standard Pennsylvania base stone. It is crushed stone with the fines left in, so it compacts hard under a drive or a patio. Buyers who ask for Crusher Run usually want the same job done. For a finished surface, Driveway Gravel tops a compacted base, and Walkway Gravel gives paths a finer, walkable finish.

Delivery to Allentown and the Surrounding Area

Order online and pick the quantity by the ton or by the yard. If you are unsure how much the job takes, size the load with the calculator before you check out. Then choose your delivery date at checkout.

A dump truck delivers bulk material to your site. Point out where you want the pile dropped so the load lands close to the work and does not block the drive.

Pennsylvania Rock Supply covers Allentown and the rest of Lehigh County, including Whitehall, Emmaus, Breinigsville, Catasauqua and Slatington.

Ground and Conditions in Allentown

Timing drives everything here. Base, driveway and paver work runs from spring, once the ground has thawed and dried, into late fall. Base stone should not go down on frozen, soft or muddy ground. It will not compact, and it will move later.

This part of the state sits on folded bedrock: sandstone ridges with thin, stony soils, and valleys floored by shale or by limestone and dolomite that weather to clay. Clay holds water, and a base laid over wet clay fails.

In the limestone and dolomite valleys, runoff concentrated from roofs, gutters and drives can open sinkholes. Route that water away from the house with clean stone and a proper drain line.

Cold winters bring repeated freeze-thaw cycles that heave and break up a thin base or one that holds water. Frost depth is commonly about 36 inches, set by each municipality. That is why drainage under the base matters as much as the base itself.

Questions About Gravel and Delivery in Allentown

Do you deliver 2A modified to Allentown, PA?

Yes. Pennsylvania Rock Supply delivers 2A modified and other bulk aggregates to Allentown and the surrounding Lehigh County area, including Whitehall, Emmaus, Breinigsville, Catasauqua and Slatington. You order online, choose your quantity by the ton or yard, and pick a delivery date at checkout. A dump truck then brings the load to your site.

What gravel is best for a driveway in Allentown?

Start with 2A modified. It is crushed stone with the fines left in, so it compacts hard and carries traffic. In wet spots, put clean 2B stone underneath to move water away from the base. Top the compacted base with driveway gravel for the finished surface. Skip clean stone alone as a wearing course, since it stays loose under tires.

Order 2A Modified and Drainage Stone in Allentown

Pennsylvania Rock Supply delivers bulk gravel, washed stone, sand and soil across Allentown and Lehigh County. Pick your material, size the load with the calculator, and choose a delivery date at checkout. Order online when your site is ready.