What Is A Foundation Underpinning?

Our installation department is certified to perform installations for all the different types of foundations out there. A foundation underpinning pad is essentially a concrete pad that is installed underneath the footing of your foundation to add structural support to a specific section, which has become weakened over time.

A home or foundation inspection will reveal any issues that require foundation underpinning.

These underpinning pads are extremely efficient at reinforcing a specific area without replacing the entire foundation.

As you may know, significant earth movement or soil erosion is a frequent cause of foundation damage, and the installation of underpinning pads is a far more cost-effective alternative to foundation replacement.

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Why Do I Need Foundation Underpinning?

Underpinning is the process of strengthening and stabilizing the foundation of an existing building or other structure. Foundation underpinning may be necessary for a variety of reasons.

California Foundation Works provides cost-effective solutions for settlement problems due to unstable soils and shifting foundations.

foundation underpinning

Foundation underpinning and column support strengthen and stabilize the existing structure. Foundations that sit in shallow soil are often susceptible to various issues due to natural soil breakdown.

Foundations underpinning can correct instability issues when columns are placed in problem soils, subjected to extreme moisture conditions, or lack proper drainage. Other benefits include stabilization of soils near excavations and building foundations that prevent undermining of footings.

When correctly designed and installed underpinning provides support for the structure along with eliminating settlement issues.

Some causes of a settlement are: Inadequate Footings, Improper Soil Compaction, Damaged and Leaking Underground Utilities, Decaying of Organic Material and Extreme Hydration or Evaporation of Soils

Process Of Foundation Underpinning

Major foundation underpinning is typically done in the A-B slot method. For example, every other 5′ section of the foundation is underpinned (A), and subsequently, the other 5′ sections (B) are underpinned. This method is used to eliminate or minimize the need for shoring.

Underpinning is accomplished by extending the foundation in depth or in breadth so it either rests on a more supportive soil stratum or distributes its load across a greater area.
Underpinning pads are generally used when the loads from the foundations need to be transferred to stable soils at considerable depths.

Underpinning pads may either be augured or driven steel cased, and are normally between 12-36 square feet. Each foundation underpinning retrofit is a unique situation and will be designed by a professional structural engineer.

arrow_greenAfter a thorough assessment, one of our foundation repair experts will provide you with a free*, no-obligation quote.


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