Foundation Repair · Service

Push piers, and the lift they promise you

These are driven down using your house as the thing to push against. The same mechanism that makes them work is the reason "we'll get it back to level" is a claim to examine rather than accept.

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In short

What is push pier installation?

A push pier is a steel tube driven vertically into the ground by a hydraulic ram that pushes against a bracket fixed to your foundation — meaning the weight of the building is what the ram reacts against. Sections are added until the pier meets material capable of carrying the load. That reaction requirement is why the method suits heavier structures, and it is also why any lift comes from pressurising the installed piers rather than from jacking the house independently.

Triggers

Signs you need push pier installation

A masonry or full-height house with a corner or section that has settled measurably below the rest
A settlement pattern that an elevation survey shows to be one-directional rather than seasonal back-and-forth
Exterior stair-step separation in brickwork concentrated toward one end of a wall
A foundation wall where the top has dropped relative to the framing, leaving gaps under the sill or at the header
An engineer's report calling for underpinning to competent bearing beneath a building with substantial dead load
Settlement continuing after drainage and any water source has already been corrected
A previous repair attempt at shallower depth that has since moved again

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The job

How push pier installation actually works

Check that the structure can serve as reaction

The hydraulic ram pushes the pier down by pushing up against the building. If the structure above the bracket does not weigh enough, the house starts to move before the pier reaches competent material and the installation cannot develop the resistance it needs.

Watch for: The method being proposed for a porch, a deck, a sunroom or a light single-storey addition. Those are the classic cases where reaction runs out — helical piers exist largely because of this constraint.
Assess the footing that will carry the bracket

The bracket clamps to the foundation and everything passes through that connection. Excavation exposes the footing so its size, condition and reinforcement can be judged before anything is loaded through it.

Watch for: Brackets fitted to spalling, undersized or previously repaired concrete without comment. The pier can be perfect and the connection can still be the weak point, and it is buried again within hours.
Drive the pier, watching resistance build

Sections are pushed in sequence and the hydraulic pressure required to advance them is monitored. Rising pressure that holds indicates the pier is entering material with capacity, which is what the installation is chasing.

Watch for: Refusal on an obstruction being read as reaching bearing. Old debris, a buried foundation or a cobble layer can stop a pier convincingly at a depth that will not hold under sustained load. Ask how the crew distinguishes the two, and what they do when it happens.
Decide, in writing, between stabilisation and lift

Stabilisation transfers the load to the pier at the building's current position and aims to stop further movement. Lift attempts to recover some of what was lost by pressurising the piers to raise the structure. These are different objectives, with different risks and different definitions of success.

Watch for: A contract that says "lift to maximum practical recovery" or similar. That phrase means whatever the crew decides on the day, and it leaves you with no basis to say the outcome fell short.
If lifting, do it across the piers together and slowly

Lift is applied progressively across the pier group rather than driven hard at one location, because a building raised unevenly is being distorted rather than restored. Progress is monitored against the elevation survey as it happens.

Watch for: Fast lift at one corner to produce a visible result. It closes a gap somewhere and opens a new one elsewhere, and the second one appears after the crew has gone.
Expect the building to object to being moved back

Everything above has spent years accommodating the settled position. Raising it can reopen previously closed cracks, disturb rigid supply and drain connections, and change how doors and windows sit. That is inherent to lifting, not to bad workmanship — the full inventory is on the foundation leveling page.

Watch for: Being told lift carries no risk to finishes. It always carries some. What varies is how much, and whether anyone told you beforehand.
Lock off, backfill and reinstate

Once the target is met, the connection is secured so the load stays on the piers, excavations are backfilled and compacted, and disturbed surfaces are made good.

Watch for: Backfill dumped loose into deep excavations. It settles into a trench along the wall that channels surface water toward the foundation — undoing the drainage that keeps the repair from being tested again.
Close out with measurements and a location record

A repeat elevation survey documents what was actually achieved against the agreed target, and a layout drawing records where each pier sits. Both belong in your file with the contract.

Watch for: A verbal "we got most of it back". Without a closing survey, the difference between the target and the result is a matter of opinion, and opinion is not something a warranty responds to.

Money

What does push pier installation cost?

Driven pier work is generally priced per pier plus mobilisation, so the specified count and the depth reached dominate the total. Attempting lift rather than stabilising adds monitoring time on site, and repairing finishes disturbed by that lift is usually a separate cost.

See the full push pier installation cost guide — by material, size and region →

Straight answer

When push pier installation is the wrong call

Everyone else ranking for this is paid when you say yes. Here's when you shouldn't.

The structure is too light to react against. Porches, decks, sunrooms and many additions cannot supply the resistance the method depends on. Choosing it anyway means either an incomplete installation or a lifted porch, and neither is what you paid for.
You are buying it for the lift alone. If the objective is cosmetic — a door that latches, a gap closed — weigh that against reopening finishes elsewhere in the house. Stabilisation with cosmetic repair afterwards is sometimes the better trade.
Movement is seasonal rather than progressive. A house riding a shrink-swell cycle and returning each year is not settling one way. Piers installed at one point in that cycle fix the position the house happened to be in that week.
The cause is still active and untreated. A running under-slab leak, an unaddressed drainage failure, or erosion beside the footing all continue after installation. Underpinning reaches past the affected soil, but the surrounding conditions still get to keep working on your house.
The wall is moving inward rather than downward. Lateral soil pressure is a different failure mode entirely, and vertical support does not resist it. See bowing wall repair.
No independent measurement supports the pier count. Counts should trace to an elevation survey and a load assessment. If the only justification is a walk-around, you are pricing somebody's judgement without seeing the working.

Your options

Types of push pier installation

Driven vs screwed underpinning

The head-to-head comparison, including the reaction constraint in detail.

Bracket and pier hardware

The components and their published specifications.

Stabilisation only

Load transferred at the current position, with cosmetic repair handled separately.

Partial elevation recovery

An agreed, measured amount of lift with a written tolerance rather than an open promise.

Helical piers for light structures

Where there is not enough building weight to push against.

Compare foundation repair options side by side →

Before you sign

What to check when hiring for push pier installation

Is my structure heavy enough to serve as reaction at every proposed location?

The precondition for the whole method. Locations along a light wing or a single-storey section are where this quietly fails.
Is the contract for stabilisation or for lift, and what target is written down?

The most consequential sentence in the agreement. A named target with a tolerance is checkable; "maximum practical" is not.
How will you tell competent bearing from an obstruction?

A pier stopped on buried debris looks successful during installation and fails later. The answer should describe pressure behaviour over time, not just a number reached.
Who repairs finishes disturbed by lifting, and is that in this price?

Lift moves plaster, tile, trim and sometimes pipework. Establish ownership of that work before it exists, not while standing in the room looking at it.
Will you check plumbing connections after lifting?

Rigid drain and supply lines crossing the foundation are the things least able to accommodate movement, and a slow leak created by lift can go unnoticed for months.
What is your procedure if a pier does not achieve the required resistance?

Tells you whether additional depth is inside the price, and whether the crew has a defined response or improvises.
How long has this company operated under this name, and who honours the warranty if it changes?

A lifetime transferable warranty is only as durable as the entity behind it. Ask about ownership changes, whether obligations pass on a sale of the business, and what documentation you would need to produce years from now.

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Local pros

Push Pier Installation near you

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Related work

Often done at the same time

Helical Pier Installation

The screwed alternative, with a torque record

Foundation Leveling

How much can be recovered, and what it breaks

Slab Foundation Repair

What to rule out before underpinning a slab

Foundation Inspection

Independent measurement behind the pier count

All foundation repair services →

FAQ

Push Pier Installation — questions people ask

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Can push piers really lift a house back to level?

They can raise a structure, and sometimes recover a useful part of what was lost. Full recovery is a different claim. The building has cured, cracked and settled into its current geometry, so material that moved is not always able to move back, and pushing harder to force it is how damage happens. Treat any recovery as a target with a tolerance rather than a guaranteed outcome.

Why does my house need to be heavy enough?

Because the ram that drives the pier down is pushing up against your foundation at the same time. That upward force has to be resisted by the weight above the bracket. Where the structure is light, the building begins to rise before the pier has reached ground capable of carrying it, so the installation stops short of doing its job while appearing to have finished.

Is lifting ever a bad idea even when it is possible?

Yes, and this is the part that rarely appears in a sales conversation. Lift reopens cracks that closed, stresses rigid pipework crossing the foundation, can loosen tile and masonry, and changes door and window geometry that had reached equilibrium. Where the settlement is old and stable, stabilising at the current position and repairing the visible damage is often the lower-risk purchase.

How do I know the piers reached solid ground?

Driven installations are judged on the hydraulic pressure required to advance the pier and how that pressure behaves as the pier is held. Ask for the installation record per location and ask specifically how obstructions were ruled out, because a pier resting on buried rubble produces convincing readings on the day and settles afterwards.

How long does a push pier project take?

Exterior work on a limited number of locations is often a matter of days, with excavation and reinstatement accounting for much of it. Projects grow when access is tight, when lift is attempted and monitored slowly, when interior locations require flooring removal, or when piers have to be advanced further than the base scope assumed.

Will I need to do this again?

The intent is that the load now bears on material well below the soil that caused the problem, so recurrence at those locations should be unlikely. What piers do not do is treat the cause. If drainage, a leak or erosion is still working on the site, movement can appear elsewhere along the foundation — and that is generally not what a pier warranty responds to.