How to Put a Foundation Under an Existing House?

How to Put a Foundation Under an Existing House?

Putting a new foundation under an existing house is a common practice for addressing deteriorated or compromised foundations. Whether it’s due to age, deterioration, settlement, or the use of outdated construction materials, a new foundation may be necessary to ensure the stability and structural integrity of the house. The process of adding a new foundation can vary depending on the type of existing foundation – raised or slab-on-grade.

For raised foundations, the house is shored up temporarily while the old footing is removed and a new footing is constructed using rebar and concrete. Slab-on-grade foundations may require a sister footing to be installed underneath the old foundation. It’s crucial to assess the condition of the existing foundation and determine the extent of work needed before proceeding.

The duration and cost of the project will depend on the size of the house and the specific requirements. On average, the cost for adding a new foundation to an average-sized home can range from $75,000 to $100,000. To ensure the best course of action, it is essential to consult with professionals who specialize in foundation work.

Key Takeaways:

• Adding a new foundation to an existing house is possible and common.
• The process varies depending on the type of existing foundation.
• Raised foundations require temporary shoring up and construction of a new footing.
• Slab-on-grade foundations may need a sister footing underneath the old foundation.
• Consult with professionals to assess the existing foundation and determine the best approach.

Why should foundations be strengthened?

Foundations play a crucial role in the stability and structural integrity of homes. Strengthening foundations is essential to ensure the longevity of a house and prevent further deterioration or settlement. Older homes, constructed using outdated building practices and materials, may not meet current standards, compromising the foundation’s strength.

One common method of strengthening foundations is through underpinning, which involves providing additional support and stability to the existing foundation. Underpinning can address structural issues caused by an unstable or weakened foundation, such as uneven floors or cracks in walls. By reinforcing the foundation, underpinning helps prevent further damage and maintains the structural integrity of the house.

House Leveling and Foundation Repair

In addition to underpinning, house leveling and foundation repair may be necessary to address existing issues. Over time, foundations can shift or settle, resulting in an uneven or sagging house. House leveling involves lifting the house and adjusting the foundation to restore it to its original position. This process can correct issues such as sloping floors and sticking doors or windows.

Foundation repair focuses on addressing specific problems, such as cracks or leaks, to prevent further damage. Repairs can include sealing cracks, reinforcing weak areas, and waterproofing the foundation. By addressing these issues promptly, homeowners can prevent more severe problems down the line and maintain the value of their property.

Summary

Strengthening foundations is crucial for the stability and longevity of homes. Through methods like underpinning, house leveling, and foundation repair, existing issues can be addressed, preventing further deterioration and ensuring the structural integrity of the house. Consultation with professionals who specialize in foundation work is essential to assess the condition of the foundation and determine the best course of action for strengthening it.

Can you put a new foundation under a home?

Yes, it is absolutely possible to add a new foundation to an existing home. Whether your house has a raised foundation or a slab-on-grade, the old foundation can be replaced with a new one that provides stability and structural integrity.

If you have a raised foundation, the process involves temporarily shoring up the house to support the structure while the old footing is removed. A new footing is then constructed using rebar and concrete. The new foundation can be built in sections or all at once, depending on the stability of the house during construction.

For homes with a slab-on-grade foundation, a sister footing may need to be installed underneath the existing foundation. This helps reinforce and strengthen the structure, ensuring its long-term stability.

When adding a new foundation, it is crucial to consult with professionals who specialize in foundation work. They have the expertise and experience to assess your specific situation and determine the best approach for your home. Factors such as the size of your house and any specific requirements will influence the duration and cost of the project.