House Jacks2026-10-16T07:43:14-05:00

Fix Sagging Floors with House Jacks in Sioux Falls

Sagging, uneven or bouncy floors are often a sign that the support system beneath your home needs attention. As crawl space support posts settle and floor framing weakens over time, the right solution is more than simply lifting the floor; it requires restoring long-term structural support.

House jacks, also called crawl space jacks or floor support jacks, are engineered to strengthen and stabilize your home's floor support system. At Blackburn Foundation Repair, every repair begins with a thorough structural inspection to pinpoint what's causing the problem. Then we'll recommend a customized floor stabilization solution designed to support weakened floor joists, reinforce your crawl space and help protect your home for years to come.

What Are House Jacks?

House jacks are adjustable steel support posts that stabilize sagging floors by reinforcing weakened floor joists and beams from beneath your home. Installed in a crawl space or basement, they transfer structural loads to a stable foundation beneath your home.

Unlike temporary jack posts or wood supports, engineered house jacks are designed as a long-term structural repair. They help reduce floor movement, improve stability and, in many cases, lift sagging floors closer to their original position.

Every home is different, which is why the right repair starts with a thorough inspection. We'll assess your floor framing, crawl space conditions and structural supports to determine whether house jacks are the best solution for your home.

What Causes Crawl Space Structural Damage?

Crawl space structural damage often develops slowly as moisture, shifting soils and aging materials weaken the floor support system beneath your home. Excess humidity, poor drainage, freeze-thaw cycles and aging vented crawl spaces can all contribute to wood deterioration, settling support posts and unstable soil. Over time, these conditions may leave floor joists and beams without adequate support, resulting in sagging, uneven or bouncy floors.

Our Crawl Space Support Solution

Every sagging floor has an underlying cause, so every repair begins with a thorough structural inspection. If weakened floor supports turn out to be the source of the problem, we’ll recommend a permanent solution designed to stabilize your home’s floor system for the long term.

  • For stabilizing crawl spaces and sagging floors

    SmartJack® House Jack System

    The SmartJack® House Jack System is Blackburn Foundation Repair‘s engineered solution for stabilizing sagging floors and strengthening weakened crawl space support systems. Adjustable galvanized steel support posts sit on a stable base to provide permanent support beneath floor joists and beams, helping reduce floor movement while improving floor levelness.

    No two homes are the same, which is why every SmartJack® installation begins with a comprehensive structural inspection. We’ll evaluate your crawl space, floor framing and support system to determine the right placement and number of supports needed for lasting performance. What you get is a repair designed specifically for your home’s needs, not a one-size-fits-all fix.

    • Permanently stabilizes sagging, uneven floors
    • Reinforces weakened floor joists and beams
    • Adjustable design helps correct floor levelness
    • Heavy-duty galvanized steel resists corrosion
    • Installed on a stable, engineered base
    • Tailored to your home’s structural needs
    • Backed by Blackburn Foundation Repair‘s written warranty
How It Works

SmartJack® Installation Process

Here’s how we inspect, design and install a customized SmartJack® support system to stabilize sagging floors and strengthen your home’s crawl space.

Symptoms

Common Signs Your Home May Need a SmartJack® System

Sagging floors seldom improve on their own. When you notice changes in how your floors feel or other signs of structural movement, your crawl space support system may need attention. A professional inspection can uncover the underlying cause and determine whether SmartJack® is the right solution.

Common Signs Include:

  • Sloping or sagging floors
  • Springy or bouncy floors
  • Floors that feel soft or unstable
  • Squeaky floors that are getting worse
  • Gaps forming between floors and baseboards
  • Crawl space support posts that are leaning, rotting or failing
Benefits

Why homeowners choose Blackburn Foundation Repair for foundation piers

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What To Expect

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We’ll walk you through what we’re seeing in easy-to-understand language so you know the root cause of the issue, not just the symptoms.

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Frequently Asked Questions

How much do house jacks cost? 2026-10-02T09:45:48-05:00

The cost of installing house jacks varies based on your home’s size, the number of supports needed, crawl space accessibility and existing structural conditions. Since every repair is customized, there’s no one-size-fits-all price. A free professional inspection lets us provide an accurate recommendation and estimate for your home. 

How do I know if my home needs house jacks or another repair solution? 2026-10-02T09:45:21-05:00

The only way to know for sure is through a professional structural inspection. Sagging or uneven floors can result from several issues, including weakened floor framing, failing support posts, foundation settlement or moisture damage. We’ll identify the root cause and recommend the repair best suited to your home, not simply install a product. 

Will house jacks continue to be adjusted over time? 2026-10-02T09:44:55-05:00

SmartJack® support posts are adjustable, which allows for precise installation and, if needed, minor future adjustments. Depending on your home’s condition and repair plan, additional adjustments may be recommended as the structure settles and adapts to the new support system. 

How long does house jack installation take? 2026-10-02T09:44:27-05:00

Most house jack installations can be completed in one to two days, though larger or more complex projects may take longer. The timeline depends on the size of the crawl space, accessibility, the number of supports required and whether additional structural repairs are needed. Your inspector will explain what to expect before the work starts. 

Can house jacks level uneven floors? 2026-10-02T09:43:59-05:00

Often, yes. House jacks can help lift and stabilize sagging floors, improving floor levelness and reducing bounce. Every home is different, though, and the amount of correction depends on the condition of the framing, how long the floors have been sagging and the home’s overall structural condition. 

Are house jacks a permanent solution? 2026-10-02T09:43:26-05:00

Yes, they are. Professionally installed house jacks serve as a long-term structural repair, not a temporary fix. When set on a properly prepared base and paired with the appropriate repair plan, they deliver lasting support for weakened floor systems while addressing the underlying cause of the problem. 

How do house jacks fix sagging floors? 2026-10-02T09:42:40-05:00

House jacks stabilize sagging floors by transferring the weight of your home’s floor system to a stable, engineered base beneath the crawl space. This added support reinforces weakened joists and beams, helping cut down on floor movement and, in many cases, improving floor levelness. The system is customized to your home’s specific structural needs. 

What are house jacks? 2026-10-02T09:41:53-05:00

House jacks are adjustable steel support posts designed to strengthen weakened floor joists and beams from beneath your home. Set in a crawl space or basement, they provide permanent structural support where existing supports have settled or deteriorated. Professionally engineered house jacks help stabilize sagging floors and strengthen your home’s floor system for long-term performance. 

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