Do You Need Foundation Piers?

What the decision actually hinges on

Piering is a structural intervention meant to transfer a foundation's load down to more stable soil or bedrock, bypassing the weaker soil that failed to support it originally. The decision to install piers should follow from a specific finding: that a section of foundation has settled, and that the cause is a loss of soil bearing capacity rather than something else, like normal seasonal movement or a cosmetic issue.

Piering does not correct every kind of foundation problem, and it is not typically the first step for movement that hasn't been confirmed as progressive settlement.

The test for whether piering is justified

• Documented, measurable settlement — elevation surveys or crack tracking show a section has moved down and is continuing to move, not just a single measurement taken once.
• A plausible cause tied to soil support — such as moisture-related soil change, poor compaction, or a drainage issue affecting that specific area.
• Movement severity that affects structural performance — cracking that compromises wall integrity, doors and windows that no longer function, or floor slopes beyond a level considered acceptable.
• Confirmation that the movement isn't primarily due to a fixable surface cause, like grading or gutter discharge, which should generally be corrected and monitored before assuming structural repair is required.

What piers do and do not fix

Piers stabilize a foundation section by transferring its load to deeper, more competent soil, and in some cases they can lift a settled section back toward its original elevation. What they do not do is address the moisture or drainage condition that caused the soil to lose support in the first place — if that root cause isn't corrected, nearby soil conditions can continue to change even after piering.

Piers also do not address cosmetic cracking unrelated to settlement, nor do they correct issues like basement wall bowing caused by lateral soil pressure, which is a different structural problem with different solutions.

Alternatives to consider first

These alternatives are appropriate when the evidence doesn't yet support a structural diagnosis, or when the movement is plausibly explained by a correctable surface condition.

• Drainage correction — regrading, gutter extensions, or a drain tile system — where movement appears linked to water accumulation rather than a persistent bearing failure.
• Continued monitoring — for movement that is minor, not clearly progressive, or recently noticed, a documented monitoring period can clarify whether intervention is actually needed.
• Addressing a specific point source, such as repairing a leaking pipe, before assuming structural correction is necessary.

The risk of piering an area that never settled

Installing piers where there is no genuine loss of soil support carries downsides beyond unnecessary cost. Piers change how load is carried through a foundation, and installing them in a section that was already stable does not improve outcomes and can, in some cases, introduce new stress points at the transition between piered and non-piered sections. This is part of why an accurate diagnosis matters more than treating piering as a default fix for any foundation crack or crawl space concern.

How the decision is typically confirmed

A structural inspection, sometimes supported by an engineer's review for more significant cases, is the usual path to confirming whether piering is warranted. This generally includes elevation measurements, an assessment of soil and drainage conditions around the affected area, and a review of the history and progression of movement.

Next step

If you're unsure whether your situation calls for piers, monitoring, or a drainage correction, a foundation inspection is the right starting point. From there, an estimate can lay out the recommended approach and what it would involve.