If you're getting quotes for foundation repair in Utah, two words are going to come up: helical piers and push piers. They're the two most common deep-foundation repair methods, and they sound interchangeable in sales pitches. They're not. Each has a place, and the right choice depends on your specific situation more than on which one a particular repair company prefers.
Push piers (resistance piers)
A push pier is a steel pipe that's hydraulically pressed into the ground using the weight of the house as the resistance force. The piers are driven section by section until they hit a load-bearing layer (usually competent soil or bedrock), then the house is transferred onto the piers via bracket connections at the foundation.
Strengths:
- Drives to actual load-bearing capacity (you know when you've hit something firm)
- Can reach deep load-bearing layers
- Often the right choice for heavier structures
Limitations:
- Requires the structure to provide reaction force — won't work for very light structures
- Installation can introduce point loads on the existing foundation
- May require excavation around the foundation for bracket installation
Helical piers
A helical pier is a steel shaft with helical (screw-like) plates welded near the bottom. It's screwed into the ground using a hydraulic torque drive — no pushing on the structure required. The capacity is verified by torque (more torque means denser soil means more capacity).
Strengths:
- Doesn't depend on the structure for installation force, so good for lighter structures (decks, porches, additions)
- Can be installed before the structure exists (great for new construction in poor soils)
- Predictable capacity from torque correlation
- Less excavation in many cases
- Works well in soils where push piers struggle
Limitations:
- Capacity depends on soil at the helix elevation, which is shallower than where push piers end up
- Less effective in very dense or rocky soils (the helix can\'t advance)
- Requires specialized equipment
Which is right for Utah soils?
Honest answer: it depends. Different parts of the Wasatch Front have different soil profiles, and the right pier depends on your specific soils, your specific structure, and what you're trying to fix.
- Bench expansive clay: Often well-suited to either, but helicals can be more efficient because the load-bearing layer is sometimes shallower than it looks.
- Valley alluvium: Both work. Push piers can be more efficient if you need to go deep.
- Hooper / west-side alluvial pockets: Helicals are often a better fit because of the variability and the lighter loads on rural-residential structures.
- Lighter additions and decks: Helicals win almost every time because push piers need a heavy reaction.
Why sales pitches mislead
Many foundation repair companies specialize in one or the other (it's the equipment they own and the people they've trained). When you call them, they'll recommend whatever they sell. That's not necessarily dishonest — they genuinely believe in their method — but it means the recommendation isn't independent.
An engineer who designs the repair is independent. We don't sell piers. We design what your specific structure needs, write the spec, and let you bid it out to qualified contractors of either type. Often the bids come back lower than the original sales-driven quote, because the contractors are competing against a defined scope rather than upselling.
What we'd do
- Site visit to evaluate the actual problem ($350-$500)
- Determine whether piers are even the right answer (they often aren't — sometimes the fix is drainage, grading, or a simpler repair)
- If piers are warranted, design the repair plan with pier locations, capacity requirements, and installation specs
- You bid the work to qualified contractors
Total engineering scope for a typical residential repair plan is $1,500-$3,000. The savings versus going straight to a sales-driven quote are often more than the engineering cost.