Morristown

Helical piles in Morristown, Tennessee

Much of Tennessee sits on soluble rock. According to the U.S. Geological Survey, carbonate rocks underlie most of Middle Tennessee and large areas of East Tennessee, producing sinkholes, sinking streams and irregular bedrock surfaces. Clay-rich residual soils over that limestone can be soft in some spots and pinned on rock pinnacles in others, which leads to uneven settlement.

Frost is modest, and local jurisdictions set the value. Knoxville uses a 12-inch figure similar to Nashville's 12-inch minimum, and higher elevations may call for more, so confirm with the Morristown building department. In karst terrain an engineer may want borings before choosing pile locations. Typical uses include hillside decks, additions, and docks and boathouses on TVA lakes.

Helical pile companies serving Morristown

One company based in Morristown is listed.

• Herrco Foundation Solutions: Offers concrete lifting and repair, foundation jacking, crack repair and helical piers in Knoxville and East Tennessee.

Costs and what to ask

HomeGuide reports that helical piers cost about $2,000 to $4,000 each installed nationally, with about $3,000 typical. Tennessee projects vary with depth to rock, the number of piers and site access. See our helical pier cost guide for the main cost drivers. Questions to ask:

• How do you handle shallow or pinnacled limestone, and will borings be done first?
• What torque will confirm each pile, and will you provide the logs?
• Which shaft size and galvanizing are specified?
• Who pulls the permit, and what does the warranty cover?

Nearby listings include Knoxville and Maryville. See all Tennessee helical pile installers.