Support Jacks
Crawl Space Support
Lift Sagging and Sloping Floors from the Ground Up
Sagging or uneven floors are often a sign of problems hidden in the crawl space, such as shifting soil, excess moisture, wood rot, or inadequate support beneath floor joists. Over time, these issues can cause floors to dip, feel bouncy, or become unsafe. Crawl space support posts are designed to lift and stabilize sagging floor joists, helping restore strength and levelness to your floor system. When combined with proper crawl space moisture control and repairs, these supports address both the symptoms and underlying causes of floor sagging, protecting your home’s structure and comfort for the long term.
Does your crawl space need support?
Common Signs
There are a few signs that tell you your crawl space needs some additional support, which includes:
- Sloping, uneven floors
- Gaps along baseboards
- Cracks in interior walls or ceiling
- Doors and windows are sticking
- Sagging or damaged floor joists
- Floors are bouncy or springy
What is a SmartJack®?
SmartJack® is a crawl space support system designed to lift and stabilize sagging floors. Steel support posts are installed beneath floor joists and set on a solid base that transfers your home’s weight to stable soil. Once installed, the system can be adjusted to raise uneven floors back toward a level position.
Built to handle heavy loads, SmartJack® stabilizes and lifts failing floor systems for a long-term solution. Sagging or uneven floors are often caused by weak soils, excess moisture, or undersized supports in the crawl space. When paired with crawl space encapsulation, SmartJack® helps correct both the visible floor issues and the underlying conditions causing them.
The Strength of SmartJack®
Before & Afters
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After
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After
Sagging Floors Lifted Back to Stable
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After
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Basement Stabilized with Jacks
Common Questions
Frequently Asked Questions
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Support jacks function like car jacks — using leverage, a jack lifts and holds material above and dispurses the load downward through its base. In crawl spaces, where mid-span support beams can weaken and degrade over time from any number of issues, jacks are used to provide long-term strength to the structure.
SmartJack® crawl space supports are constructed from a galvanized, corrosion-resistant steel, each jack sports a load-bearing capacity of over 60,000 pounds. Our specialists will install secure footings and mountings for each jack, then adjust the jack heights until the beams are fully-supported. We don't just stop at support — under the proper circumstances, SmartJack® can level out sunken floors in your home by returning crawl space joists to their pre-damage positions.
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Yes, sagging floors can be fixed. In many homes, floor sagging is caused by weak soil, moisture issues, or inadequate support in the crawl space. By installing a permanent support system like SmartJack®, we can lift and stabilize sagging floor joists, helping restore strength, safety, and levelness to your floors.
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Sagging or sloping floors are often a sign that something beneath your home needs attention. In many cases, the issue starts in the crawl space, where excess moisture can weaken beams and floor joists over time. As this support system deteriorates, floors above can begin to slope or sink. By addressing moisture with a CleanSpace® crawl space liner and reinforcing floor joists with the SmartJack® support system, we can stabilize the structure and restore strength and stability to your floors.