Excelsior Springs

Helical piles in Excelsior Springs, Missouri

Excelsior Springs is in Clay County, north of Kansas City, in one of the country's major karst states. The Missouri Department of Natural Resources has identified about 16,000 sinkholes, formed where groundwater dissolves limestone and dolomite, and clay soils that shrink and swell add to the movement.

Missouri has no statewide frost depth for site-built homes. The state's frost depth map for manufactured homes runs from 12 to 25 inches, and Kansas City area codes commonly call for 30 to 36 inches, so confirm locally.

Helical pile companies serving Excelsior Springs

One company in our directory is based in Excelsior Springs.

• KC Pier Foundation and Waterproofing: repairs foundations and waterproofs basements in Kansas City and Wichita; ask which foundation systems it installs before booking.

Costs and what to ask

The Missouri guide cites HomeGuide, which puts a typical installed helical pier at about $2,000 to $4,000. Missouri costs vary with depth to bearing, pier count, and access around the house. For more, see our helical pier cost guide.

A written estimate in Excelsior Springs should list pier count, target torque, engineering and permit fees, and how extra depth is billed. Given karst and shrink-swell clay, ask to see how the contractor reached those assumptions, and keep every record after the job is finished.

• Who is the engineer of record, and did the design account for karst and shrink-swell clay?
• Will you record installation torque for every pile and give me the logs?
• What shaft size and galvanizing or corrosion protection do you use for Excelsior Springs conditions?
• Who pulls the Excelsior Springs permit, and what warranty covers the work?

For wider coverage, see Missouri helical pile installers.