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Sagging & Sinking Crawl Space Floor Repairs in the Southeast

We recommend installing the SmartJack® System, which uses adjustable heavy duty steel crawl space jack posts. These posts install quickly in a home and provide the best solution for restoring stability to your floors and crawl sapce.

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Structural Sagging Floor Solutions for Crawl Spaces

Crawl space floor inspection

SmartJack® support installation

Joist and beam reinforcement

Floor leveling and stabilization

Secondary damage correction

Crawl space encapsulation

Wood rot and mold remediation

Understanding Sagging Floors

Sagging floors in homes built over crawl spaces occur when the support system beneath the main level flooring (including support posts, girders, and floor joists) weakens or settles. This leads to noticeable dips, bounces, or unevenness in the floors upstairs, and can cause doors to stick, windows to bind, and cracks to appear in drywall. Unlike concrete slab issues, sagging floors in crawl space homes often indicate problems with the wooden structural elements and the supports beneath them.

Sagging Floors
Cantey Foundation Specialists

Signs to Look Out For!

Weak or Rotting Floor Joists and Beams
High humidity and moisture in crawl spaces can lead to wood rot, mold, and mildew, which weaken wooden floor joists and support beams. This deterioration causes the wood to lose its strength and sag under the weight of the floor above.
Uncontrolled moisture in a crawl space, often from poor drainage, plumbing leaks, or lack of a vapor barrier, contributes to wood rot and allows for fungal growth that damages wooden structural components.
These organisms thrive in damp environments and directly feed on and break down wood, severely compromising its structural integrity.
Existing support posts (often concrete blocks or wooden posts) may settle or sink into the soil if the soil beneath them is weak, poorly compacted, or has experienced changes in moisture content.
Sometimes, the original construction may have had too few support posts, or the spans between supports were too wide for the load, leading to gradual sagging over time.
Termites and other wood-boring insects can significantly damage floor joists and beams, leading to structural weakening and sagging.

Common Issues from Sagging Floors

Uneven or Sloping Floors

The most obvious sign is a floor that is no longer level, with noticeable dips or slopes.

Bouncy or Spongy Floors

Floors that feel weak, "bouncy," or spongy when walked upon.

Cracked Drywall or Plaster

Cracks appearing in interior walls or ceilings, particularly in corners or around door and window frames, as the house settles unevenly.

Sticking Doors and Windows

Doors that jam or don't latch properly, and windows that are difficult to open or close, due to shifted framing.

Gaps

Gaps between the floor and interior walls.

Visible Sagging in Crawl Space

Beams or joists in the crawl space that are visibly bending or sagging.

Musty Odors

A persistent musty smell emanating from the crawl space, indicating high humidity and potential mold or wood rot.

Increased Energy Bills

Sagging floors can sometimes indicate an unsealed crawl space, leading to energy loss.

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The Best Solution For The Problem

The SmartJack® Crawl Space Support System For permanently stabilizing and lifting sagging floors in crawl spaces, we primarily use the SmartJack® Crawl Space Support System.

SmartJack® Crawl Space Support System

  • The SmartJack® system consists of heavy-duty, galvanized steel support jacks that are installed directly beneath sagging floor joists or beams in your crawl space.
  • These adjustable jacks connect to a pre-cast concrete footing or solid engineered fill that extends to stable load-bearing soil, ensuring long-term stability.
  • They are designed to permanently lift and stabilize sagging floors, and can be adjusted over time to fine-tune the leveling of the floor above.
  • Made from corrosion-resistant steel, the SmartJack® system is built to last and provides a stable alternative to unreliable concrete block piers.

Our Process for Repairing Sagging Floors

Thorough Crawl Space Inspection

Our crawl space repair specialists conduct a detailed inspection of your crawl space, identifying the cause of the sagging floors, assessing the condition of joists, beams, and existing supports, and checking for moisture, mold, or wood rot.

01

Customized Repair Plan

Based on the inspection, we design a tailored solution. This plan will specify the optimal placement and number of SmartJack® supports needed, along with recommendations for any necessary wood repair, replacement, or crawl space encapsulation.

02

Site Preparation

In the crawl space, a stable footing is prepared beneath each proposed SmartJack® location. This may involve excavating and pouring a small concrete footing or creating a solid engineered fill.

03

SmartJack® Installation

The galvanized steel SmartJack® supports are assembled and installed on the prepared footings beneath the sagging girders or joists.

04

Floor Stabilization & Lifting

Once installed, the SmartJack® supports are carefully adjusted to provide immediate stabilization to the floor system and, in many cases, can gently lift the sagging floors back toward their original level position.

05

Wood Repair/Replacement (if needed)

If wood rot or extensive damage is present, our team will perform necessary wood sistering, reinforcement, or replacement of joists and beams to restore full structural integrity.

06

Crawl Space Encapsulation (recommended)

To prevent future moisture issues and wood deterioration, we highly recommend combining the structural repair with a full crawl space encapsulation system, including a vapor barrier, dehumidifier, and proper drainage.

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Why Choose Cantey for Sagging Floor Repairs?

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Specialized Expertise

We are specialists in crawl space structural repair, with in-depth knowledge of causes and effective solutions for sagging floors.

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Permanent & Reliable Solutions

Our SmartJack® system offers a permanent, adjustable, and warrantied solution for floor stabilization, unlike temporary fixes.

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Comprehensive Approach

We address not only the symptom (sagging floors) but also the root causes like moisture, wood rot, or inadequate support, ensuring a lasting fix.

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Patented Supportworks Products

We utilize the industry-leading SmartJack® system, designed and manufactured by Supportworks, ensuring high quality and proven performance.

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Highly Trained Professionals

Our crews are expertly trained and certified in the installation of the SmartJack® system and wood repair techniques.

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Restored Floor Stability

Eliminates unevenness, bounces, and dips, making your floors feel solid and secure again.

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Prevents Further Structural Damage

Stabilizes the entire floor system, preventing future cracks in walls, sticking doors, and other signs of structural stress.

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Durable & Long-Lasting

The galvanized steel SmartJack® system is built to last and comes with a strong warranty, providing long-term peace of mind.

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Adjustable for Precision

SmartJack® supports are adjustable, allowing for precise leveling and future fine-tuning if needed.

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Benefits of Our Sagging Floor Solutions

Restored Floor Stability & Levelness

Eliminates unevenness, bounces, and dips, making your floors feel solid and secure again.

Prevents Further Structural Damage

Stabilizes the entire floor system, preventing future cracks in walls, sticking doors, and other signs of structural stress.

Increases Home Value

A stable, level floor system enhances the structural integrity and market value of your home.

Durable & Long-Lasting

The galvanized steel SmartJack® system is built to last and comes with a strong warranty, providing long-term peace of mind.

Adjustable for Precision

SmartJack® supports are adjustable, allowing for precise leveling and future fine-tuning if needed.

Improved Indoor Air Quality (with encapsulation)

By addressing moisture and mold, combining with encapsulation can significantly improve the air quality in your home.

Pest Deterrent

Repairing and encapsulating the crawl space can help deter pests that thrive in damp, unstable environments.

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Ask about our financing options

Cantey Foundation Specialists offers flexible, easy to understand financing options for homeowners. During our in-house visit, your specialist will help you find the financing options that work for YOU!

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Fixed

Rate

12.99% for 120mos

6 Mos

No Interest

No Payments

12 Mos

No Interest

With Min Payments

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What causes floors to sag in a crawl space?

Sagging floors are typically caused by weak or rotting wood floor joists and beams due to moisture, settling or inadequate support posts, or insufficient original support for the floor system.

If you notice significant dips, a bouncy feel, sticking doors and windows, or cracks in your interior walls, it’s likely a serious issue that warrants a professional inspection. Visible sagging or wood rot in the crawl space are definitive signs.
Yes, the SmartJack® system is designed to be a permanent solution. Its heavy-duty steel construction and stable footings ensure long-term support for your floors, and it comes with a strong warranty.
In many cases, yes. The SmartJack® supports are adjustable and can be used to gently and gradually lift sagging floors back towards their original, level position.
Absolutely. Addressing moisture and wood rot is crucial for a complete and lasting repair. We offer wood repair/replacement and comprehensive crawl space encapsulation and dehumidification services to protect your home’s structure from future damage.

frequently asked questions about sagging floors

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