Helical Piles

A foundation needs solid ground beneath it, and sometimes that ground sits many feet down, past soil too weak to build on. Helical piles reach that depth by turning a steel shaft with helical plates into the ground, like a large screw, until it reaches soil strong enough to carry the load. Engineers and foundation contractors use them to support new construction or to underpin an existing structure that has settled.

Problems Helical Piles Solve

A foundation resting on weak soil doesn't fix itself. Helical piles are one way engineers reach past that soil to something solid.

Foundations settling because the soil beneath them can't carry the building's weight

New construction planned on a site where the upper soil layers are too weak or loose to build on directly

Additions or heavier loads placed on an existing foundation that wasn't designed to carry them

Structures near water, marsh, or fill soil, where deep bearing capacity is hard to find close to the surface

Key Signs You Need Helical Piles

These are the general conditions engineers look for before specifying helical piles.

Cracks in a foundation wall that keep growing, especially stair-step cracks in block or brick

Doors and windows that stick or won't close square anymore

A visible tilt or lean in a porch, deck, or addition

Soil reports showing weak or loose soil near the surface, with better bearing soil only reached at depth

A new structure planned for a site with known fill soil, marsh, or a history of settlement nearby

An existing foundation repair that has failed before and settled again

Benefits of Helical Piles

Why engineers reach for helical piles when soil near the surface can't carry the load.

Reaches deep, load-bearing soil layers. A helical pile is turned down through weak upper soil until its plates sit in soil strong enough to carry the structure's weight.

Installation crews aren't digging an open trench next to the structure. Turning a shaft into the ground is a smaller footprint than open excavation, which lowers the safety risk that comes with working in and around an open pit.

Installs with a compact rig, so tight or low-access sites stay workable.

Can be installed and tested for capacity in a single site visit, without a multi-day cure time.

Capacity is checked using the installation torque itself. As the shaft turns into the ground, the resistance it meets correlates to how much load the soil at that depth can carry, so the pile's capacity is checked as it goes in, not guessed at afterward.

Why Choose Helical Piles?

Helical piles are the right call when a structure needs a deep, mechanically anchored foundation element, one that reaches past weak surface soil to bearing soil at depth, and where installation access allows a rig to turn the shaft into the ground. They fit new construction on marginal soil, additions that add load to an existing foundation, and underpinning where a fast, torque-verified capacity check matters.

They are not the right tool where the actual problem is a void or loose, ungraded soil rather than a genuine lack of deep bearing capacity. In that case, Void Filling or Soil Stabilization solves the real problem directly, without adding a structural pile the site may not need. Helical piles also are not a fit where site access can't support a drill rig or mini excavator with a rotary head; a smaller-footprint injection method is the better starting point there.

Helical piles are often installed alongside grade beams or new footings on the same project, since the piles carry the load down to bearing soil while the beam or footing spreads that connection across the structure above.