What's under a Weldon Spring driveway
Clayey subsoils with high shrink-swell potential are common on St. Charles County uplands, and they move as they wet and dry. Freeze-thaw winters add to it. Crushed rock in the base is what holds a surface steady, so we dig out weak material, compact rock in lifts and grade so water leaves quickly.
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 Weldon Spring estimate is sized to the soil, the traffic and the drainage on your property.