What's under a Biehle driveway
Eastern Perry County is karst, with caves, sinkholes, springs and losing streams tying surface runoff straight into shallow groundwater. Water moves in ways you cannot always see, and soft spots show up where it collects. We look at drainage before thickness, dig out what is soft, and compact rock in layers.
When you compare bids, ask each contractor for three numbers in writing: the compacted asphalt thickness, the base depth, and what happens to the water. Those three decide how long the surface lasts.
Compacted asphaltTypically 2 to 3 in. for a car drive
Stone baseTypically 4 to 8 in., compacted
Drive on itUsually 2 to 3 days, longer in heat
First sealcoatTypically 6 to 12 months after paving
Typical ranges. Your Biehle estimate is sized to the soil, the traffic and the drainage on your property.