Underpinning
Underpinning a structure is the process of installing piles under existing footings, walls, and slabs to reinforce the foundation.
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What Is The Purpose Of Underpinning?
All of the foundation technologies we provide, including helical piles, helical micropiles, micropiles, large diameter piles, and driven piles, can be utilized to underpin existing structures. TerraCana has the knowledge and experience to know which technology is the most appropriate for your underpinning project.
- Prevent settlement and sinking of an existing foundation.
- Provide support for an existing building or structure during the construction of another.
- Installation of new foundation inside existing building to support new equipment or buildouts.
- Building an addition on top of the existing building.
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Residential Underpinning Process
01
Consultation
TerraCana works with architects and engineers preparing specifications for new homes. We also offer visual inspections and estimates to homeowners who suspect they have foundation problems. These homeowners are often worried and have many questions. How serious are the warning signs? What are the options for repairing the damage? What costs are involved? How intrusive is the work? Our goal is to remove all mystery from the process, so you can feel reassured knowing that you have a reliable foundation.
02
Design
Once you’ve settled on the right approach for your new construction or repair, TerraCana will do all the design work needed to get started. Our in-house engineering team prepares detailed drawings that include the materials to be used.
03
Installation
When an existing structure has settled or needs additional load capacity, helical piles can be installed with minimal disruption to the building and its occupants. TerraCana installed piles inside a fully operational brewery in Surrey, working within inches of existing equipment without halting production.
04
Repair
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FAQs
What is the purpose of underpinning?
Underpinning is used to strengthen or extend the foundation of an existing building so it can carry additional load or transfer load to a deeper, more stable soil layer. It is typically needed when a building’s original foundation is insufficient for new loading conditions, when adjacent excavation threatens foundation stability, or when the supporting soil has deteriorated or settled.
Does underpinning increase house value?
Underpinning that corrects foundation problems and provides verified structural stability can positively affect a property’s value and marketability because it gives buyers and insurers confidence in the building’s structural condition. The value impact depends on the nature of the original problem, the quality of the underpinning work, and whether engineering documentation is provided.
What is an example of underpinning?
Do I need a structural engineer for underpinning?
Yes. Underpinning involves modifying the load path of an existing structure and must be designed by a licensed structural and geotechnical engineer. The engineer will assess the existing foundation, determine the required solution, and provide stamped drawings.
What are the risks of underpinning?
The primary risks of underpinning are settlement of the existing structure if the work is not carefully sequenced, and damage to adjacent structures if ground movement occurs. These risks are managed through proper engineering design, staged construction sequencing, monitoring of the structure during installation, and using experienced contractors who understand the geotechnical conditions at the site.
Is it worth it to repair the foundation?
Yes, in the vast majority of cases, foundation repair is worth the investment. A compromised foundation affects the structural integrity of the entire building and can lead to progressive damage to walls, floors, and framing over time. Addressing foundation issues early is almost always less expensive than delaying repair. Documented foundation repairs also protect property value and are required disclosure items in real estate transactions.
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