Why the base matters in Ladue
Upland soils across the county formed mostly in loess, and the St. Louis County soil survey says local roads on many of them need adequate base material plus ditches and culverts because of low strength and frost action. Freeze-thaw winters push anything that stays wet. We keep water off the subgrade and compact the rock base 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 Ladue estimate is sized to the soil, the traffic and the drainage on your property.