Types of Underpinning

Save

Underpinning refers to the process or art of repairing the existing foundation of a building or structure. Underpinning is commonly referred to as foundation repair and there are several types. In order to choose the proper underpinning method, examine and understand the architecture of the existing structure, the foundation supports and the exact problem with the foundation.

Function

  • Underpinning, or repairing a foundation, is necessary in situations in which the existing foundation is unable to support the weight of the structure or is not stable enough. Also, when nearby construction and excavation has affected the soil support system of the existing foundation, underpinning is also necessary. Additional causes for underpinning include changes in the function of the structure and weight supported by the structure.

Types

  • Several underpinning methods repair and provide support for an existing foundation. The types include various systems of piers and piles, such as bracket piles, helical piers, screw piles, hand-dug piers, jacked piles and mini-piles. The types of piers and piles differ according to the installation process, other materials used for underpinning and the layout of the piers or piles.

Process

  • Before underpinning, foundation technicians must set up a temporary support system so they can work safely underneath the existing structure and foundation. They make temporary support with steel beams inserted at angles underneath the edges of the foundation. Once the support system is in place, technicians drill, dig holes under the structure, and construct the new support system or foundation. When the underpinning is complete, the final step involves removing the temporary support system.

Significance

  • During the underpinning process, the piles and piers are built to extend to stable soil, or soil resistant to compacting and settling, so the repaired foundation nor the structure it supports should not move.

Considerations

  • Underpinning is expensive, regardless of the type, often more than $5,000 for materials and work, depending upon the type of underpinning.

References

Promoted By Zergnet

Comments

Resources

You May Also Like

  • Types of House Foundations

    Homes in the United States are usually built directly on a slab foundation or over a crawl space or basement.

  • What Is Underpinning?

    Underpinning is a technique used in construction to reinforce or strengthen an existing building's foundation. The process can be accomplished in a...

  • How to Repair Holes in Mobile Home Skirting

    For the millions of people who live in mobile homes, the idea of finding a hole in their mobile home skirting is...

  • How to Underpin a Mobile Home

    Underpinning and skirting are often seen as synonyms when referring to mobile home applications. While some underpinning can double as skirting, it...

  • How do I Underpin a Cement Wall Foundation?

    One method of repairing differential settlement of a cement wall foundation is underpinning. Although expensive, underpinning provides a new, permanent foundation for...

  • Types of Mobile Home Skirting

    Mobile-home skirting is barrier that extends from the bottom of the mobile home to the ground. It works to cover the mobile...

  • Sinkhole Repair Methods

    Sinkholes are subsidences or collapses in the earth's surface, usually caused by natural geological processes, but also sometimes caused or hastened by...

Related Searches

Check It Out

22 DIY Ways to Update Your Home on a Small Budget

M
Is DIY in your DNA? Become part of our maker community.
Submit Your Work!