Gravel to Asphalt Conversion in Oshkosh, WI

A gravel to asphalt conversion turns a stone driveway into a paved one. Around Oshkosh this is common on lake lots along Lake Butte des Morts and Lake Winnebago, on rural properties in the surrounding towns and on older city homes with gravel parking pads or alley drives. Gravel is cheap to install, but it ruts, washes out, gets plowed into the lawn every winter and needs regular regrading. Blacktop ends most of that.

Can the old gravel be the base?

Sometimes. Clean crushed stone that is several inches deep and firm can be regraded, topped up and compacted as the base for the new asphalt, which saves material and hauling. But on clay ground, years of rain and traffic often push clay up into the stone, especially in the tire tracks and low spots. That mixed layer does not drain or support well. We dig test holes at the estimate to see what you have, and we quote reusing, supplementing or replacing the stone accordingly.

Drainage on long drives

A gravel drive lets some water soak through. Blacktop does not, so a long paved drive collects runoff along its whole length. We plan where water will cross or leave the drive: a slight crown so water sheds to both sides, shoulders or ditches to carry it, and sometimes a culvert where the drive crosses a low spot or roadside ditch.

Edges without curbs

Rural and lake-lot drives rarely have curbs, so the asphalt edge is exposed to tires, plows and runoff. We taper the edge, extend the stone base past it and backfill with soil so the edge is supported.

Width, turnarounds and parking

Conversions are a good time to adjust layout: a wider spot near the garage, a turnaround so you are not backing onto a county road, or a pad for a boat or camper. Each added square foot adds cost, so we quote options separately.

Road approaches

Where a rural drive meets a town or county road, the approach and any culvert under it may fall under that road authority's rules. We check before planning approach changes.

Timing a conversion

Gravel drives are easiest to evaluate in late spring, when soft spots and washouts from the thaw are still visible. We pave once the base has dried, usually from late May into fall, so the stone can be compacted properly and the hot mix keeps its heat long enough to roll.