Bentonite Clay vs Other Foundation Soils — What Makes Fort Collins Different

Fort Collins sits on some of the most expansive soil in the United States — Pierre Shale with high bentonite content. This makes foundation repair here fundamentally different from most other regions. Most of the enquiries we get from homeowners around Fort Collins, CO come in about bentonite vs other soils, and this page sets out how that work runs from the first call through to completion.

Fort Collins Bentonite vs Typical Soils

• Expansion rate: Bentonite expands 15x vs typical clay at 2-3x — dramatically more pressure on foundations
• Water absorption: Bentonite acts like a sponge — can hold water for weeks after snowmelt
• Freeze-thaw damage: Combined with 30+ freeze-thaw cycles per winter — multiplies foundation stress
• Pier depth required: Fort Collins typically needs piers driven 20-30 feet deep vs 10-15 feet in other regions