What Folsom ground means for concrete driveways
Decomposed granite and rocky subgrade in the foothill transition, with cut-and-fill lots throughout.
Driveways near the American and Sacramento river corridors sit on sandy alluvium that drains well and compacts predictably. Move east toward Rancho Cordova, south to Elk Grove or north to Antelope and expansive clay takes over. The same slab detail is not appropriate in both places, which is why we look at the ground before quoting a section rather than after.
- Cut-and-fill lots can have very different bearing conditions within a single backyard.
- Grade changes drive retaining wall, step and terraced patio work more than in valley-floor cities.
- Rocky subgrade affects excavation method and schedule on footing work.
- Historic district work near Sutter Street carries additional review considerations.
